Emerson Dixell XM660K Wiring diagram

1592023220 XM660K_XM670K GB r5.4 2021.09.01 XM660K - XM670K 1/9
CONTROLLERS FOR MULTIPLEXED CABINETS
XM660K- XM670K
-MANUAL FOR THE SW REL. 5. 4d -
1. GENERAL WARNING
1.1 PLEASE READ BEFORE USING THIS MANUAL
•This manual is part of the product and should be kept near the instrument for easy and quick
reference.
•The instrument shall not be used for purposes different from those described hereunder. It cannot
be used as a safety device.
•Check the application limits before proceeding.
•Dixell Srl reserves the right to change the composition of its products, even without notice, ensuring
the same and unchanged functionality.
1.2 SAFETY PRECAUTIONS
•Check the supply voltage is correct before connecting the instrument.
•Do not expose to water or moisture: use the controller only within the operating limits avoiding
sudden temperature changes with high atmospheric humidity to prevent formation of condensation
•Warning: disconnect all electrical connections before any kind of maintenance.
•Fit the probe where it is not accessible by the End User. The instrument must not be opened.
•In case of failure or faulty operation send the instrument back to the distributor or to “Dixell S.r.l.”
(see address) with a detailed description of the fault.
•Consider the maximum current which can be applied to each relay (see Technical Data).
•Ensure that the wires for probes, loads and the power supply are separated and far enough from
each other, without crossing or intertwining.
•In case of applications in industrial environments, the use of mains filters (our mod. FT1) in parallel
with inductive loads could be useful.
2. BEFORE PROCEEDING
2.1 CHECK THE SW REL. OF THE XM660K, XM670K
1. Look at the SW rel. printed on the label of the controller.
2. If the SW release is 5.4 proceed with this manual otherwise contact Dixell to get the right manual.
3. GENERAL DESCRIPTION
The XM660K/XM670K/ are high level microprocessor based controllers for multiplexed cabinets suitable
for applications on medium or low temperature. It can be inserted in a LAN of up to 8 different sections
which can operate, depending on the programming, as stand alone controllers or following the commands
coming from the other sections. The XM660K/XM670K are provided with respectively 4 and 6 relay
outputs to control the solenoid valve, defrost - which can be either electrical or hot gas - the evaporator
fans, the lights, an auxiliary output (XM670K) and an alarm output (XM670K). The devices are also
provided with four probe inputs, one for temperature control, one to control the defrost end temperature
of the evaporator, the third for the display and the fourth can be used for application with virtual probe or
for inlet/outlet air temperature measurement. Finally, the XM660K/XM670K are equipped with the three
digital inputs (free contact) fully configurable by parameters.
The instruments are equipped with the HOTKEY connector that permits to be programmed in a simple
way. Direct serial output RS485 ModBUS-RTU compatible permits a simple XWEB interfacing. RTC are
available as options. The HOTKEY connector can be used to connect X-REP display (Depending on the
model).
4. INSTALLATION AND MOUNTING
This device can operate without any user interface, but normal application is with Dixell CX660 or CH660
keyboard.
CX660
CH660
Fig. A
The CX660 or CH660 keyboard shall be mounted on
vertical panel, in a 29x71 mm hole, and fixed using the
special bracket supplied as shown in Fig. A.
The temperature range allowed for correct operation is 0
to 60°C. Avoid places subject to strong vibrations,
corrosive gases, excessive dirt or humidity.
The same recommendations apply to probes. Let air
circulate by the cooling holes.
4.1 DIMENSIONS
CX660
CH660
5. WIRING DIAGRAM AND CONNECTIONS
5.1 IMPORTANT NOTE
XM device is provided with disconnectable terminal block to connect cables with a cross section up to 1.6
mm2 for all the low voltage connection: the RS485, the LAN, the probes, the digital inputs and the
keyboard. Other inputs, power supply and relay connections are provided with screw terminal block or
fast-on connection (5.0 mm). Heat-resistant cables have to be used.
Before connecting cables make sure the power supply complies with the instrument’s requirements.
Separate the probe cables from the power supply cables, from the outputs and the power connections.
Do not exceed the maximum current allowed on each relay, in case of heavier loads use a suitable external
relay. N.B. Maximum current allowed for all the loads is 16A. The probes shall be mounted with the bulb
upwards to prevent damages due to casual liquid infiltration. It is recommended to place the thermostat
probe away from air streams to correctly measure the average room temperature. Place the defrost
termination probe among the evaporator fins in the coldest place, where most ice is formed, far from
heaters or from the warmest place during defrost, to prevent premature defrost termination.
5.2 XM660K –ALL POWER SUPPLY
Models with 115V supply: use terminals 8-7 for supply
5.3 XM670K –ALL POWER SUPPLY
Models with 115V supply: use terminals 8-7 for supply
5.4 KEYBOARD DISPLAY CX660 OR CH660
The XM670/679K board can operate also without keyboard.
Polarity:
Terminal [34] [-]
Terminal [35] [+]
Use twisted shielded cable
AWG 18 or less in case of
long distance.
Max distance: 30m
5.5 LAN CONNECTION - MAXIMUM 8 SECTIONS
Follow next steps to create a LAN connection, which is a necessary condition to perform synchronized
defrost (also called master-slave functioning):
1) connect a shielded cable between terminals [38] [-] and [39] [+] for a maximum of 8 sections;
2) the Adr parameter is the number to identify each electronic board. Address duplication is not
permitted, in this case the synchronized defrost and the communication with monitoring system is
not guaranteed (the Adr is also the ModBUS address). For example, a correct configuration is the
following:
If the LAN is well connected, the green LED will be ON. If the green LED blinks then the
connection is wrongly configured.
The max distance allowed is 30m
5.6 HOW TO CONNECT MONITORING SYSTEM
1) Terminals [36] [-] and [37] [+].
2) Use shielded twisted cable. For example
Belden® 8762 o 8772 or cat 5 cables.
3) Maximum distance 1Km.
4) Don’t connect the shield to the earth or to GND
terminals of the device, avoid accidental contacts
by using insulating tape.

1592023220 XM660K_XM670K GB r5.4 2021.09.01 XM660K - XM670K 2/9
Only one device for each LAN has to be connected to the RS485 connection.
The Adr parameter is the number to identify each electronic board. Address duplication is not
permitted, in this case the synchronized defrost and the communication with monitoring system is not
guaranteed (the Adr is also the ModBUS address).
5.7 DIGITAL INPUTS
1) The terminals from [30] to [33] are all free of
voltage;
2) Use shielded cable for distance higher than one
meter;
For each input, has to be configured: the polarity of
activation, the function of the input and the delay of
signaling.
The parameters to perform this configuration are i1P, i1F, i1d respectively for polarity, functioning and
delay. The i1P can be: cL = active when closed; oP = active when opened. The i1F parameter can be:
EAL = external alarm, bAL = serious lock alarm, PAL = pressure switch alarm, dor = door switch, dEF =
external defrost, AUS = auxiliary activation command, LiG = light activation, OnF = board On/OFF, FHU
= don’t use this configuration, ES = day/night, HdY = don’t use this configuration. Then there is i1d
parameter for delay of activation. For the others digital inputs there are a set of the same parameters: i2P,
i2F, i2d, i3P, i3F, i3d.
5.8 ANALOG OUTPUT
•Selectable between 4 to 20mA and
0 to 10Vdc.
•Use CABCJ15 to perform the connections
It’s located near the terminal [39] on a 2-pin connector. It’s possible to use the output to control anti-sweat
heaters through a chopped phase controller XRPW500 (500watt) or family XV...D or XV...K.
6. USER INTERFACE
6.1 ICONS
Cooling output
↓
With icon ON the output is
active, while with blinking
icon there is a delay.
MEASUREMENT UNIT
°C, Bar and (time) are
ON depending on the
selection.
Light →
←Fan
Defrost →
AUX
←Auxiliary relay
Energy saving →
←Multimaster Enabled
Generic alarm →
←Clock / time
DURING PROGRAMMING: blink the measurement units of temperature and pressure
6.2 KEYBOARD COMMANDS
Single commands:
LIGHT relay
Press light button.
AUX relay
Press down arrow.
Manual defrost
Press and hold for 3 sec the defrost button
ON/OFF
Press for 3 sec the ON/OFF button (if the function is enabled).
Energy Saving
Press for 3 sec the ON/OFF button (if the function is enabled).
Double commands:
Press and hold for about 3 sec to lock (Pon) or unlock (PoF) the keyboard.
Pressed together to exit from programming mode or from menu; on submenus rtC
and EEV this combination allow to come back to previous level.
Pressed together for 3 sec allow to access to first level of programming mode.
6.3 HOW TO MODIFY THE SET POINT FOR AIR TEMPERATURE REGULATION
The thermostat set point is the value that will be used to regulate the air temperature. The regulation
output is controlled by the electronic valve or by the relay.
BEGIN
Press SET button for 3 sec, the measurement units will blink
together.
Value
modification
or
With the arrows it’s possible to change the value within the LS
and US parameters value.
EXIT
By pressing SET it is possible to confirm the value that will blink
for about 2 sec.
In any case, it is possible to wait for about 10 sec to exit. In order to show the air temperature set is
sufficient to press and release the SET button, the value is displayed for about 60 sec.
7. HOW TO PROGRAM THE PARAMETERS (PR1 AND PR2)
The device provide 2 programming levels: Pr1 with direct access and Pr2 protected with a password
(intended for experts).
ACCESS to
Pr1
Press and hold for about 3 sec to have access to the first
programming level (Pr1).
Select item
or
Select the parameter or submenu using the arrows.
Show value
Press SET button.
Modify
or
Use the arrows to modify the value.
Confirm and
store
Press SET key: the value will blink for 3 sec, and then the
display will show the next parameter.
EXIT
Instantaneous exit from the programming mode, otherwise wait
for about 10 sec (without press any button).
7.1 HOW TO HAVE ACCESS TO “PR2”
To enter Pr2 programming menu:
1. Access to a Pr1 menu by pressing both SET+DOWN keys for 3 sec, the first parameter label will
be showed;
2. Press DOWN key till the Pr2 label will be showed, then press SET;
3. The blinking PAS label will be showed, wait some seconds;
4. Will be showed “0 - -” with blinking 0: insert the password [321] using the keys UP and DOWN and
confirming with SET key.
GENERAL STRUCTURE: The first two item rtC and EEV are related to submenus with other
parameters.
•SET+UP keys on rtC or EEV submenus allow coming back to parameter list,
•SET+UP keys on parameter list allow immediate exit.
7.2 HOW TO MOVE PARAMETER FROM PR1 TO PR2 AND VICE VERSA
Enter on Pr2; select the parameter; press together [SET + DOWN]; a left side LED ON gives to the
parameter the presence on Pr1 level, a left side LED OFF means that the parameter is not present on
Pr1 (only Pr2).
8. FAST ACCESS MENU
This menu contains the list of probes and some values that are automatically evacuate by the board such
as the superheat and the percentage of valve opening. The values: nP or noP stands for probe not present
or value not evacuate, Err value out of range, probe damaged not connected or incorrectly configured.
Entering
fast access
menu
By press and release the UP arrow. The duration of the menu
in case of inactivity is about 3 min.
The values that will be showed depend on the configuration of
the board.

1592023220 XM660K_XM670K GB r5.4 2021.09.01 XM660K - XM670K 3/9
Use
or
arrows to
select an
entry,
then press
to see the
value or to
go on with
other value.
MAP Current map (0÷3): it shows which map is used
HM Access to clock menu or reset of the RTC alarm;
An Value of analog output;
dP1 (Pb1) Value read by probe 1.
dP2 (Pb2) Value read by probe 2.
dP3 (Pb3) Value read by probe 3.
dp4 (Pb4) Value read by probe 4.
rCP Value of P4 remote probe for heaters. It is displayed only with P4C = LAn. If the
value is not available “noP” label is displayed.
dPr Regulation probe value
rSE Real thermoregulation set point: the value includes the sum of SET, HES and/or
the dynamic set point if the functions are enabled.
L°t Minimum room temperature;
H°t Maximum room temperature;
tMd Time to next defrost (mins)
LSn Number of devices in the LAN
LAn Address list of devices in the LAN
GAL To see all the active alarms in each device connected to the LAN
Exit
Pressed together or wait the timeout of about 60 sec
9. MENU FOR MULTIMASTER FUNCTION: SEC
The function “section” SEC is enabled when icon is lit. It allows entering in the remote programming
mode, from a keyboard not physically connected to the board, through the LAN functionality.
Action
Button or display
Notes
Enter menu
Press UP arrow for about 3 sec, the icon will be
ON.
Waiting for action
SEC
The menu to change the section will be entered. SEC
label will be displayed.
Enter section list
Press SET to confirm. The following list will be
available to select the proper network function.
Select proper
function
Or
LOC
GLb
To gain access only to the local device.
To share global commands to all the devices
connected to the LAN.
Confirm
Select and confirm an entry by pressing SET button.
Exit menu
Press SET and UP together or wait about 10 seconds.
(*) The devices on the LAN are indexed by using the Adr parameter (in ascending order).
EXAMPLES:
1. To send a command to in all the devices connected to the LAN: enter multimaster menu. Select
and confirm GLb. Exit from multimaster menu. Enter the programming menu and set the
parameter of global commands (from LMd to ACE).
The new setting will be shared among the controllers connected to the LAN.
AT THE END OF THE PROGRAMMING PROCEDURE, SELECT THE SECTION “LOC”. IN
THIS WAY THE ICON WILL BE SWITCHED OFF!!
9.1 SYNCHRONIZED DEFROST
The synchronized defrost allow to manage multiple defrost from different boards connected through the
LAN connection. In this way, the boards can perform simultaneous defrosts with the possibility to end
them in a synchronized way.
The Adr parameter cannot be duplicated because in this case the defrost cannot be correctly
managed.
BEGIN
Press for 3 seconds, the rtC or other will be showed. The
measurement unit blinks.
Find Adr
Press more than once the DOWN arrow to find the Adr
parameter, the press SET.
Modify Adr
or
Set the value of Adr parameter, then press SET to confirm the
parameter.
EXIT
Press the two keys together to exit from menu or wait for about
10 seconds.
The LSn and LAn parameter are only to show the actual settings (read only). See the following example
of configuration:
DAILY DEFROST FROM RTC: : [CbP= y] & [EdF = rtC]
IdF Parameter: for safety reason force the value of Idf at +1 respect to the interval between two Ld
parameters. The IdF timer is reinitialized after defrost and at every power-on.
DEFROST START: at the time selected by the parameters Ld1 to Ld6 or Sd1 to Sd6.
DEFROST END: if the probes reach the dtE temperature or for maximum MdF time.
SAFETY and RtC or RtF ALARM: with clock alarm the device will use the parameter IdF, dtE and MdF.
WARNING: don’t set [EdF = rtC] and [CbP= n].
MULTIMASTER DEFROST: all the probes with clock
Table for example
Par.
Unit A (RTC)
Unit B (RTC)
Unit C (RTC)
Adr
n
N + 1
N + 2
EdF
rtC (clock)
rtC (clock)
rtC (clock)
IdF
9 hours safety
9 hours safety
9 hours safety
MdF
45 min safety
45 min safety
45 min safety
dtE
12°C safety
12°C safety
12°C safety
Ld1
06:00 1°
06:00 1°
06:00 1°
Ld2
14:00 2°
14:00 2°
14:00 2°
Ld3
22:00 3°
22:00 3°
22:00 3°
10. COMMISSIONING
10.1 CLOCK SETTING AND RTC ALARM RESET
If the clock is present: [EdF = rtC] enable the defrost from rtc [Ld1 to Ld6].
BEGIN
UP arrow (press once) to access the fast access menu
Display
HM identify the clock RTC submenu; press
Display
HUr = hour →press to confirm/modify
Min = minutes →press to confirm/modify
…… don’t use other parameters if present.
EXIT
Press for about 10 sec. The operation resets the RTC alarm.
Note: the rtC clock menu is present also on the second level of parameters. Warning: if the board
shows the rtF alarm, the device has to be changed.
11. DISPLAY MESSAGES
Display
Causes
Notes
KEYBOARD
nod
No display: the keyboard is trying to work
with another board that is not working or
not present
Press for 3 sec UP arrow, enter the
SEC menu and select LOC entry.
Pon
Keyboard is unlocked
PoF
Keyboard is locked
rSt
Alarm reset
Alarm output deactivated
noP, nP
nA
Not present (configuration)
Not available (evaluation)
noL
The keyboard is not able to communicate
with the XM660K-XM670K
Verify the connection. Call the Service
ALARM FROM PROBE INPUT
P1
P2
P3
P4
CPF
Sensor brake down, value out of range or
sensor incorrectly configured P1C, P2C to
P6C.
CPF is showed when the remote probe 4
is not working.
P1: the cooling output works with Con
and COF,
With defrost probe on error the defrost
is performed only at interval.
TEMPERATURE ALARM
HA
Temperature alarm from parameter ALU
on probe rAL.
Outputs unchanged.
LA
Temperature alarm from parameter ALL on
probe rAL.
Outputs unchanged.
HA2
Second high temperature alarm
Outputs depends on setting.
LA2
Second low temperature alarm
Outputs depends on setting.
DIGITAL INPUT ALARM
dA
Door open alarm from input i1F, i2F or i3F
= after delay d1d, d2d or d3d.
Cooling relay and fan follow the odc
parameter. Cooling restart as
specified on rrd parameter.
EA
Generic alarm from digital input i1F, i2F,
i3F = EAL.
CA
Severe alarm of regulation lock from digital
input i1F, i2F, i3F = bAL.
Regulation output OFF.
PAL
Pressure switch lock i1F, i2F o i3F = PAL.
All the outputs are OFF.
CLOCK ALARM
rtC
Clock settings lost.
Defrost will be performed with IdF till
restoring the settings of RTC.
rtF
Clock damaged.
Defrost will be performed with IdF.

1592023220 XM660K_XM670K GB r5.4 2021.09.01 XM660K - XM670K 4/9
Display
Causes
Notes
OTHERS
EE
EEPROM serious problem.
Output OFF.
Err
Error with upload/download parameters.
Repeat the operation.
End
Parameters have been correctly
transferred.
dEF
Defrost is progress
cLn
Cleaning function active
11.1 ALLARM RECOVERY
Probe alarms P1, P2, P3 and P4 start some seconds after the fault in the related probe; they automatically
stop some seconds after the probe restarts normal operation. Check connections before replacing the
probe.
Temperature alarms HA, LA, HA2 and LA2 automatically stop as soon as the temperature returns to
normal values.
Alarms EA and CA (with i1F = bAL)recover as soon as the digital input is disabled. Alarm CA (with i1F
= PAL) recovers only by switching off and on the instrument.
12. CONTROLLING LOADS
12.1 TEMPERATURE PROBE REFERENCE FOR REGULATION
Up to 5 temperature probe can be used for the temperature regulation.
It’s possible to set the probes used for temperature regulation. Up to 4 Temperature inputs Pb1, Pb2, Pb3,
Pb4, can be used. To support above function, the parameters rPA, rPb, rP3, rP4, are used.
Which temperature probe methods of combine is set by par. rPd among the following: Average, Minimum,
Maximum, First, or Mix.
rPd = rPA: temperature detected by the probe set in the parameter rPA
rPd = rAb: mix between rPA and rPb defined by rPE parameter
rPd = AUr: average temperature of all the probes defined as Regulation Probe in the parameters rPA,
rPb, rP3, rP4
rPd = LoE: minimum value among all the temperature probes defined as Regulation Probe in the
parameters rPA, rPb, rP3, rP4
rPd = HiE: maximum value among all the temperature probes defined as Regulation Probe in the
parameters rPA, rPb, rP3, rP4
12.1.1 Sensors failure
In case of multiple temperature sensor regulation: (rPd = rAb, Aur, LoE, HiE), and with sensor failure, the
remaining sensors are used for the regulation.
In case of all sensor failure, the regulation will be performed according to Con and COF parameters
12.2 DUAL TEMP MODE OPERATION
Controller can have up to 4 pre-set regulation.
The preset regulation is set in the parameter MAP.
By digital input or supervising system is possible to enable the second regulation mode, set in the
parameter MP1.
In this way a dual temp case can be easily set and controlled.
12.2.1 Second map function by digital input configuration
By setting on digital input among i1F, i2F, i3F as the “nt” the map set in the parameter MP1is loaded when
the digital input is enabled.
12.3 THE SOLENOID VALVE
The regulation is performed according to the temperature measured by the thermostat probe that can be
physical probe or virtual probe obtained by a weighted average between two probes (see parameters
table description) with a positive differential from the set point. If the temperature increases and reaches
set point plus differential the solenoid valve is opened and then it is closed when the temperature reaches
the set point value again.
In case of fault in the thermostat probe the opening and closing time of solenoid valve is configured by
“Con” and “CoF” parameters.
12.4 PUMP DOWN BEFORE DEFROST
The following parameters has been added:
Pdt pump down type (nu; FAn; F-C)
With Pdt = nu, the pump down is not enabled.
With Pdt = Fan, when a defrost trigger is given:
a. Compressor relay will be open.
b. EEV valve (if present):
i. will be closed with CrE = n, y
ii. will be open with CrE =EUP or EU5
c. Fan will be forced on for Pdn time
With Pdt = F-C, when a defrost trigger is given:
a. EEV valve (if present):
i. will be closed with CrE = n, y
ii. will be open with CrE =EUP or EU5
b. Compressor relay and Fan will be forced on for Pdn time
Pdn pump down duration (0 to 255 min)
12.5 DEFROST
Defrost starting
In any case, the device check the temperature read by configured defrost probe before starting
defrost procedure, after that:
-(If RTC is present)Two defrost modes are available through the “tdF” parameter: defrost with electrical
heater and hot gas defrost. The defrost interval is controlled by parameter “EdF”: (EdF = rtc) defrost is
made in real time depending on the hours set in the parameters Ld1..Ld6 in workdays and in Sd1…Sd6
on holidays; (EdF = in) the defrost is made every “IdF” time;
-defrost cycle starting can be operated locally (manual activation by means of the keyboard or digital
input or end of interval time) or the command can come from the Master defrost unit of the LAN. In this
case the controller will operate the defrost cycle following the parameters it has programmed but, at
the end of the drip time, will wait that all the other controllers of the LAN finish their defrost cycle before
to re-start the normal regulation of the temperature according to dEM parameter;
-Every time any of the controller of the LAN begin a defrost cycle it issue the command into the network
making all the other controllers start their own cycle. This allows a perfect synchronisation of the defrost
in the whole multiplexed cabinet according to LMd parameter;
-Selecting dPA and dPb probes and by changing the dtP and ddP parameters the defrost can be started
when the difference between dPA and dPb probes is lower than dtP for all ddP time. This is useful to
start defrost when a low thermal exchange is detected. If ddP=0 this function is disabled;
Minimum defrost time
The “ndt” (0÷MnF) Minimum Defrost Time, set the minimum defrost duration, when the defrost is ended
by evaporator temperature probe.
The ndt time is taken in account everytime the defrost is trigged, independently form the value of end
defrost temperature probe and end defrost digital input status.
Defrost ending
-When defrost is started via rtc, the maximum duration of defrost is obtained from Md parameter and
the defrost end temperature is obtained from dtE parameter (and dtS if two defrost probes are
selected).
-If dPA and dPb are present and d2P=y the instrument stops the defrost procedure when dPA is higher
than dtE temperature and dPb is higher than dtS temperature;
At the end of defrost the drip time is controlled through the “Fdt” parameter.
12.5.1 Kind of defrost
The kind of defrost is set by parameter tdF among the following possibilities
tdF = Air: natural defrost. Defrost is made by opening the compressor/solenoid relay. The fan during
defrost depends on the parameter Fnc. Defrost relay is off. The valve is closed
tdF = EL: defrost with electrical heater: Defrost is made by opening the compressor/solenoid relay.
The fan during defrost depends on the parameter Fnc. Defrost relay is on. The valve is
closed
tdF = in: hot gas defrost. Defrost is made by closing the compressor/solenoid relay. The fan during
defrost depends on the parameter Fnc. Defrost relay is on. The valve opening percentage
during the defrost is set by the par. oPd.
12.6 ON DEMAND DEFROST
Description
Controller can perform on demand defrost. It is based on the behavior of evaporator temperature.
Controller monitors the evaporator temperature and triggers a defrost if some conditions are satisfied. For
defrost efficiency its’ important to place the “end defrost probe”, usually P2, in the coldest place of the
evaporator, usually immediately after the expansion valve.
***NOTE: Because of different type of evaporators and consequentially behaviors, it’s warmed suggested
to test and validate this algorithm in a climatic chamber before applying it in the field.
Parameters & settings:
The «On Demand Defrost» can be activated with the following settings:
CrE=”n” , EdF=”Aut”
cdt: evaporator temperature differential to trigger a defrost (default cdt = 4°K)
nbd: minimum compressor run before automatic defrost (or minimum time of activation of solenoid
valve) it has to be set properly. It prevents defrost from starting (default nbd = 4.0h)
Mbd: max compressor run before automatic defrost (or max time of activation of solenoid valve): it
has to be set properly. If reached a defrost is triggered (default Mbd = 16.0h)
nct: minimum evap. temperature, it has to be set properly. a defrost is triggered when this
temperature reached (default nct = -30°C)
NOTE: with CrE=”y” or CrE=”EUP” or CrE=EU5 only «RTC defrost» and «interval defrost» are allowed.
With EdF=”Aut” & CrE=”y” or CrE=”EUP” or CrE=EU5 the «interval defrost» will be performed, as with
EdF = in
Exceptions:
1. A defrost cannot be triggered if the compressor has not ran more than minimum time (nbd
parameter) since the last defrost or initial power up. (Resolution hh.m)
2. If the compressor has ran for more than maximum time since the last defrost or initial power up
(Mbd parameter), a defrost is triggered regardless of coil temperature .
3. If the coil temperature reaches very low temperature, (nct parameter), a defrost is triggered
regardless of cdt value.
12.7 FANS
CONTROL WITH RELAY
The fan control mode is selected by means of the “FnC” parameter:
C-n = running with the solenoid valve, OFF during the defrost;
C-y = running with th1e solenoid valve, ON during the defrost;
O-n = continuous mode, OFF during the defrost;
O-y = continuous mode, ON during the defrost;
An additional parameter “FSt” provides the setting of temperature, detected by the evaporator probe,
above which the fans are always OFF. This can be used to make sure circulation of air only if his
temperature is lower than set in “FSt”.
CONTROL WITH ANALOG OUTPUT (if present)
The regulation probe is set in the parameter FAP
The modulating output (trA=rEG) works in
proportional way (excluding the first AMt
seconds where the fans speed is the
maximum). The regulation set point is relative
to regulation set point and is indicated by ASr,
the proportional band is always located above
SET+ASr value and its value is PbA. The fan
are at minimum speed (AMi) when the
temperature read by fan probe is SET+ASr
and the fan is at maximum speed (AMA) when
the temperature is SET+ASr+PbA.
NOTE: to use properly this function FAP has to be set as the thermostat probe.

1592023220 XM660K_XM670K GB r5.4 2021.09.01 XM660K - XM670K 5/9
12.8 ANTI SWEAT HEATERS
The anti-sweat heater regulation can be performed with on board relay (if OA6 = AC) or with the analog
output (if present by setting trA = AC). However the regulation can be performed in two ways:
•Without real dew-point information: in this case the default value for dew-point is used (SdP
parameter).
•Receiving dew-point from XWEB5000 system: the SdP parameter is overwritten when valid
value for dew-point is received from XWEB. In case of XWEB link is lost, SdP is the value
that will be used for safety.
The best performance can be obtained using probe 4. In this case, the regulation follows the chart:
Probe 4 should be placed on the showcase glass. For each cabinet can be used only one probe 4 (P4)
sending its value to the others section that are connected to the LAN.
HOW TO WORK WITH PROBE 4 THROUGH THE LAN:
Param.
XM6x0K_1
Without probe 4
XM6x0K_2 + with probe 4
XM6x0K_3+ Without
probe 4
Adr
n
n + 1
n + 2
LCP
LCP = n
LCP = Y
LCP = n
P4C
LAN or not connect
the probe
P4C = NTC, PtC or PtM
LAN or not connect the
probe
trA
trA = AC if the device has the analog output
OA6
OA6 = AC if the device will use the AUX relay for regulation
HOW TO WORK WITHOUT PROBE 4:
Param.
XM6x0K
Without probe 4
P4C
nP
AMt
% of ON
In this case, the regulation is performed by switching
on and off the auxiliary relay on a 60 minutes time
base. The ON time will be the AMt value, so that the
relay will be ON for AMt minutes and OFF for [60-
AMt] minutes.
In case of P4 error or if P4 is absent the output is at AMA value for the AMt time then the output is at 0
value for the time [255 –AMt] time performing a simple PWM modulation.
12.9 CLEANING MODE FUNCTION BY DIGITAL INPUT CONFIGURATION
The “cLn” value is added to the functions of the digital input.
The function has the same basic features of the stand by function, but with the following differences:
a. By the parameter LcL (no, yES) it’s possible to set if the light is on or off during cleaning mode.
This parameter LcL can be override by light button or by Light on/off Modbus command.
b. By the parameter FcL (no, yES) ) it’s possible to set if the fan is on or off during cleaning mode.
In case of fan on, the FSt parameter (fan stop temperature) is override.
12.9.1 Display
During the Cleaning Status, the display shows the “cLn” message.
12.10 AUXILIARY OUTPUT
The auxiliary output is switch ON and OFF by means of the corresponding digital input or by pressing and
releasing the down arrow key.
13. PARAMETER LIST
REGULATION
rtC Access to CLOCK submenu (if present);
Set Temperature set point (LS÷US)
Hy Differential: (0,1÷25,5°C; 1÷45°F): Intervention differential for set point, always positive.
Solenoid valve Cut IN is Set Point Plus Differential (Hy). Solenoid valve Cut OUT is when the
temperature reaches the set point.
LS Minimum set point limit: (-55.0°C

SET; -67°F÷SET) Sets the minimum acceptable value for
the set point.
US Maximum set point limit: (SET

150°C; SET÷302°F) Set the maximum acceptable value for set
point.
OdS Outputs activation delay at start up: (0÷255 min) This function is enabled at the initial start up
of the instrument and inhibits any output activation for the period of time set in the parameter.
(AUX and Light can work)
AC Anti-short cycle delay: (0÷60 min) interval between the solenoid valve stop and the following
restart.
CCt Compressor ON time during continuous cycle: (0.0÷24.0h; resolution 10min) Allows to set
the length of the continuous cycle: compressor stays on without interruption for the CCt time. Can
be used, for instance, when the room is filled with new products.
CCS Set point for continuous cycle: (-55÷150°C / -67÷302°F) it sets the set point used during the
continuous cycle.
Con solenoid valve ON time with faulty probe: (0÷255 min) time during which the solenoid valve is
active in case of faulty thermostat probe. With COn=0 solenoid valve is always OFF.
CoF solenoid valve OFF time with faulty probe: (0÷255 min) time during which the solenoid valve
is off in case of faulty thermostat probe. With COF=0 solenoid valve is always active.
DISPLAY
CF Temperature measurement unit: °C=Celsius; °F=Fahrenheit. !!! WARNING !!! When the
measurement unit is changed the parameters with temperature values have to be checked.
rES Resolution (for °C): (in = 1°C; dE = 0.1 °C) allows decimal point display;
Lod Instrument display: (nP; P1; P2, P3, P4, P5, P6, tEr, dEF) it selects which probe is displayed by
the instrument. P1, P2, P3, P4, P5, P6,tEr= virtual probe for thermostat, dEF= virtual probe for
defrost.
rEd Remote display: (nP; P1; P2, P3, P4, P5, P6, tEr, dEF) it selects which probe is displayed by
the X-REP. P1, P2, P3, P4, P5, P6,tEr= virtual probe for thermostat, dEF= virtual probe for
defrost.
dLy Display delay: (0 ÷24.0 m; resolution 10s) when the temperature increases, the display is
updated of 1 °C/1°F after this time.
rPA Regulation probe A: (nP; P1; P2, P3, P4, P6) first probe used to regulate room temperature. If
rPA=nP the regulation is performed with real value of rPb.
rPb Regulation probe B: (nP; P1; P2, P3, P4, P5) second probe used to regulate room temperature.
If rPb=nP the regulation is performed with real value of rPA
rP3 Regulation probe 3: (nP; P1; P2, P3, P4, P6) third probe used to regulate room temperature,
with rPd = rAb, Aur, LoE, HiE
rP4 Regulation probe 4: (nP; P1; P2, P3, P4, P6) fourth probe used to regulate room temperature,
with rPd = rAb, Aur, LoE, HiE
rPd Temperature Regulation Strategy: (rPA, rAb, Aur, LoE, HiE)
rPA: temperature detected by the probe set in the parameter rPA
rAb: mix between rPA and rPb defined by rPE parameter
AUr: average temperature of all the probes defined as Regulation Probe in the parameters rPA,
rPb, rP3, rP4
LoE: minimum value among all the temperature probes defined as Regulation Probe in the
parameters rPA, rPb, rP3, rP4
HiE: maximum value among all the temperature probes defined as Regulation Probe in the
parameters rPA, rPb, rP3, rP4
rPE Regulation virtual probe percentage: (0 ÷ 100%) it defines the percentage of the rPA respect
to rPb. The value used to regulate room temperature is obtained by:
value_for_room = (rPA*rPE + rPb*(100-rPE))/100
DEFROST
dPA defrost Probe A: (nP; P1; P2, P3, P4, P6) first probe used for defrost.
dPb defrost Probe B: (nP; P1; P2, P3, P4, P6) second probe used for defrost.
tdF Defrost type: (Air, EL, in)
Air = Air defrost (defrost relay is not switched on during defrost)
EL = defrost with electrical heater;
in = hot gas defrost;
EdF Defrost mode: (rtc –in- Aut) (only if RTC is present) rtc= defrost activation via RTC; in= defrost
activation with idf; AUt = on demand defrost.
Srt Heater set point during defrost: (-55.0 ÷ 150.0°C; -67 ÷ 302°F) if tdF=EL during the defrost
the defrost relay perform an ON/OFF regulation with Srt as set point.
Hyr Differential for heater: (0.1°C ÷ 25.5°C , 1°F ÷ 45°F) the differential for heater;
tod Time out for heater: 0 ÷ 255 (min.) if the defrost probe temperature is bigger than Srt for all tod
time the defrost ends altough the defrost probe temperature is lower than dtE or dtS. It permits to
reduce defrost duration;
d2P Defrost with two probes: (n –Y) n= only the dPA probe is used to defrost management; Y=
defrost is managed with dPA probe and dPb probe. Defrost can performed only if both probe
value are lower than dtE for dPA probe and dtS for dPb probe;
dtE Defrost termination temperature (Probe A): (-55,0÷50,0°C; -67÷122°F) (Enabled only when
the evaporator probe is present) sets the temperature measured by the evaporator probe dPA
which causes the end of defrost;
dtS Defrost termination temperature (Probe B): (-55,0÷50,0°C; -67÷122°F) (Enabled only when
the evaporator probe is present) sets the temperature measured by the evaporator probe dPb
which causes the end of defrost;
IdF Interval between defrosts: (0÷120h) Determines the time interval between the beginning of two
defrost cycles;
idE Time to next defrost log into not volatile memory
no: time to next defrost is not logged into no volatile memory, this means controller will use the
idF interval after a power off. E.I. idF = 8: controller performs a defrost every 8h. If controller is
switched off, independently from when last defrost happened, at power on it will do the first defrost
after 8 hours.
yES: time to next defrost is logged into no volatile memory, this means controller will use it after
a power off. E.I. idF = 8: controller performs a defrost every 8h. If controller is switched off 6 hours
after last defrost, at power on it will do the first defrost after 2 hours (6+2 = 8). It is useful in places
subjected to frequent power outages.
ndt Minimum duration of defrost: (0÷MdF min) it sets the minimum defrost duration, independently
form the temperature reached by the end defrost probes;
MdF Maximum duration of defrost: (ndt÷255 min) When dPA and dPb aren’t present, it sets the
defrost duration, otherwise it sets the maximum duration for defrost;
dSd Start defrost delay: (0 ÷ 255 min) This is useful when different defrost start times are necessary
to avoid overloading the plant.
dFd Display during defrost: rt = real temperature; it = temperature reading at the defrost start; Set
= set point; dEF = “dEF” label;
dAd Defrost display time out: (0

255 min) Sets the maximum time between the end of defrost and
the restarting of the real room temperature display.
Fdt Drain down time: (0÷255 min.) time interval between reaching defrost termination temperature
and the restoring of the control’s normal operation. This time allows the evaporator to eliminate
water drops that might have formed due to defrost.
dPo First defrost after start-up: y = Immediately; n= after the IdF time
dAF Defrost delay after continuous cycle: (0÷23.5h) time interval between the end of the fast
freezing cycle and the following defrost related to it.
PUMP DOWN
Pdt Pump down type (nu, FAn, F-C)
nu: pump down disabled
FAn : pump down enabled. Fan is activated for pump down duration, compressor relay/solenoid
valve is switched off with CrE=n/Y o or activated with CrE=EUP or EU5.
F-C: pump down enabled. Fan and compressor relay are activated for pump down duration. See
above for solenoid valve behaviour.
Pdn Pump down duration (0÷255min)
ON DEMAND DEFROST
Ctd Differential for defrost start (0.1°C ÷ 25.5°C , 1°F ÷ 45°F)
nbd Minimum Compressor run time before defrost 0.0 to 24h00min)
Mdb Maximum Compressor run time before defrost (0.0 to 24h00min)
nct Minimum coil temperature to trigger a defrost (-55.0°C to 150.0°C; 67°F to 302°F]

1592023220 XM660K_XM670K GB r5.4 2021.09.01 XM660K - XM670K 6/9
FAN
FAP Fan probe: (nP; P1; P2, P3, P4, P5) first probe used for fan.
FnC Fan operating mode: C-n = running with the solenoid valve, OFF during the defrost; C-y =
running with the solenoid valve, ON during the defrost; O-n = continuous mode, OFF during the
defrost; O-y = continuous mode, ON during the defrost;
Fnd Fan delay after defrost: (0÷255 min) The time interval between the defrost end and evaporator
fans start.
FCt Temperature differential avoiding short cycles of fans (0.0°C ÷ 50.0°C; 0°F ÷ 90°F) If the
difference of temperature between the evaporator and the room probes is more than the value of
the Fct parameter, the fans are switched on;
FSt Fan stop temperature: (-50÷110°C; -58÷230°F) setting of temperature, detected by evaporator
probe, above which the fan is always OFF.
FHy Differential to restart fan: (0.1°C ÷ 25.5°C) (1°F ÷ 45°F) when stopped, fan restarts when fan
probe reaches FSt-FHy temperature;
tFE Fan regulation by temperature during defrost (n, y)
Fod Fan activation time after defrost: (0 ÷ 255 min.) it forces fan activation for indicated time;
Fon Fan ON time: (0÷15 min) with Fnc = C_n or C_y, (fan activated in parallel with compressor). it
sets the evaporator fan ON cycling time when the compressor is off. With Fon =0 and FoF ≠ 0
the fan are always off, with Fon=0 and FoF =0 the fan are always off.
FoF Fan OFF time: (0÷15 min) with Fnc = C_n or C_y, (fan activated in parallel with compressor). it
sets the evaporator fan off cycling time when the compressor is off. With Fon =0 and FoF ≠ 0 the
fan are always off, with Fon=0 and FoF =0 the fan are always off.
MODULATING OUTPUT - if present
trA Kind of regulation with PWM output: (UAL –rEG –AC) it selects the functioning for the PWM
output. UAL= the output is at FSA value; rEG= the output is regulated with fan algorithm
described in fan section; AC= anti-sweat heaters control (require the XWEB5000 system);
SOA Fixed value for analog output: (0 ÷ 100%) value for the output if trA=UAL;
SdP Default value for Dew point: (-55,0÷50,0°C; -67÷122°F) default value of dew point used when
there is no supervising system (XWEB5000). Used only when trA=AC;
ASr Dew-point offset (trA=AC) / Differential for modulating fan regulation (trA=rEG): (-25.5°C ÷
25.5°C) (-45°F ÷ 45°F);
PbA Differential for anti-sweat heaters: (0.1°C ÷ 25.5°C) (1°F ÷ 45°F)
AMi Minimum value for analog output: (0÷AMA)
AMA Maximum value for analog output: (Ami ÷ 100)
AMt Anti-sweat heaters cycle period (trA=AC)/ Time with fan at maximum speed (trA=rEG):
(0÷255 s) when the fan starts, during this time the fan is at maximum speed;
ALARMS
rAL Probe for temperature alarm: (nP - P1 - P2 - P3 - P4 - P5 –tEr) it selects the probe used to
signal alarm temperature
ALC Temperature alarm configuration: rE = High and Low alarms related to Set Point; Ab = High
and low alarms related to the absolute temperature.
ALU High temperature alarm setting: (ALC= rE, 0

50°C or 90°F / ALC= Ab, ALL

150°C or 302°F)
when this temperature is reached and after the ALd delay time the HA alarm is enabled.
ALL Low temperature alarm setting: (ALC = rE , 0

50 °C or 90°F / ALC = Ab , - 55°C or - 67°F

ALU) when this temperature is reached and after the ALd delay time, the LA alarm is enabled.
AHy Differential for temperature alarm: (0.1°C ÷ 25.5°C / 1°F ÷ 45°F) Intervention differential for
recovery of temperature alarm;
ALd Temperature alarm delay: (0÷255 min) time interval between the detection of an alarm condition
and the corresponding alarm signalling.
rA2 Probe for second temperature alarm: (nP - P1 - P2 - P3 - P4 - P5 –tEr) it selects the probe
used to signal alarm temperature
A2U Second high temperature alarm setting: (A2L

150°C or 302°F) when this temperature is
reached and after the A2d delay time the HA2 alarm is signalled.
A2L Second Low temperature alarm setting: (- 55°C or - 67°F

A2U) when this temperature is
reached and after the A2d delay time, the LA2 alarm is signalled.
A2H Differential for second temperature alarm: (0.1°C ÷ 25.5°C / 1°F ÷ 45°F) Intervention
differential for recovery of second temperature alarm;
A2d Second temperature alarm delay: (0÷255 min) time interval between the detection of second
temperature alarm condition and the corresponding alarm signalling.
dAO Delay of temperature alarm at start-up: (0min÷23h 50min) time interval between the detection
of the temperature alarm condition after the instrument power on and the alarm signalling.
EdA Alarm delay at the end of defrost: (0

255 min) Time interval between the detection of the
temperature alarm condition at the end of defrost and the alarm signalling.
dot Temperature alarm exclusion after door open: (0 ÷ 255 (min.)
tbA Disabling alarm relay by pressing a key: (n; Y)
OPTIONAL OUTPUT (only for XM670K)
oA5 relay at term. 1-2-3 configuration: (nP –CPr -CP2- -dEF-Fan-ALr-LiG-AUS-Htr-OnF - AC):
nP = not used; CPr= relay works as a compressor or solenoid valve relay; CP2= relay works as
second dEF= relay works as defrost relay; Fan= relay works as a Fan relay; ALr= activation with
alarm conditions; LiG= light activation; AUS= auxiliary relay, it can be switched ON/OFF also by
key; Htr = dead band regulation (not compatible with CrE=y); OnF= ON/OFF functioning, AC
= anti sweat heaters
oA6 relay at term. 17-18 configuration: nP –CPr -CP2- -dEF-Fan-ALr-LiG-AUS-Htr-OnF - AC):
nP = not used; CPr= relay works as a compressor or solenoid valve relay; CP2= relay works as
second dEF= relay works as defrost relay; Fan= relay works as a Fan relay; ALr= activation with
alarm conditions; LiG= light activation; AUS= auxiliary relay, it can be switched ON/OFF also by
key; Htr = dead band regulation (not compatible with CrE=y); OnF= ON/OFF functioning, AC
= anti sweat heaters
CoM Type of functioning modulating output:
•For models with PWM / O.C. output →PM5= PWM 50Hz; PM6= PWM 60Hz;
OA7= not set it;
•For models with 4÷20mA / 0÷10V output →Cur= 4÷20mA current output; tEn=
0÷10V voltage output;
AOP Alarm relay polarity: cL= normally closed; oP= normally opened;
iAU Auxiliary output is unrelated to ON/OFF device status: n= if the instrument is switched off
also the auxiliary output is switched off; Y= the auxiliary output state is unrelated to the ON/OFF
device status
DIGITAL INPUTS
i1P Digital input 1 polarity: (cL –oP) CL: the digital input is activated by closing the contact; OP:
the digital input is activated by opening the contact.
i1F Digital input 1 function: (nu - EAL –bAL –PAL –dor –dEF –AUS –LiG –OnF –Htr –FHU –
ES –Hdy) nu = not used; EAL= external alarm; bAL= serious external alarm; PAL= pressure
switch activation; dor= door open; dEF= defrost activation; AUS= auxiliary activation; LiG= light
activation; OnF= switch on/off the instrument; FHU= not used; ES= activate energy saving; nt =
second map enabling; cLn = clean function dEn = defrost off, CP1 = compressor 1 safety, CP2
= compressor 2 safety;
d1d Time interval/delay for digital input alarm: (0

255 min.) Time interval to calculate the number
of the pressure switch activation when i1F=PAL. If I1F=EAL or bAL (external alarms), “d1d”
parameter defines the time delay between the detection and the successive signalling of the
alarm. If i1F=dor this is the delay to activate door open alarm
i2P Digital input 2 polarity: (cL –oP) CL : the digital input is activated by closing the contact; OP:
the digital input is activated by opening the contact.
i2F Digital input 2 function: (nu - EAL –bAL –PAL –dor –dEF –AUS –LiG –OnF –Htr –FHU –
ES –Hdy) nu = not used; EAL= external alarm; bAL= serious external alarm; PAL= pressure
switch activation; dor= door open; dEF= defrost activation; AUS= auxiliary activation; LiG= light
activation; OnF= switch on/off the instrument; FHU= not used; ES= activate energy saving; nt =
second map enabling; cLn = clean function dEn = defrost off, CP1 = compressor 1 safety, CP2
= compressor 2 safety;
d2d Time interval/delay for digital input alarm: (0

255 min.) Time interval to calculate the number
of the pressure switch activation when i2F=PAL. If I2F=EAL or bAL (external alarms), “d2d”
parameter defines the time delay between the detection and the successive signalling of the
alarm. If i2F=dor this is the delay to activate door open alarm
i3P Digital input 3 polarity: (cL –oP) CL : the digital input is activated by closing the contact; OP:
the digital input is activated by opening the contact.
i3F Digital input 3 function: (nu - EAL –bAL –PAL –dor –dEF –AUS –LiG –OnF –Htr –FHU –
ES –Hdy) nu = not used; EAL= external alarm; bAL= serious external alarm; PAL= pressure
switch activation; dor= door open; dEF= defrost activation; AUS= auxiliary activation; LiG= light
activation; OnF= switch on/off the instrument; FHU= not used; ES= activate energy saving; nt =
second map enabling; cLn = clean function dEn = defrost off, CP1 = compressor 1 safety, CP2
= compressor 2 safety;
d3d Time interval/delay for digital input alarm: (0

255 min.) Time interval to calculate the number
of the pressure switch activation when i3F=PAL. If i3F=EAL or bAL (external alarms), “d3d”
parameter defines the time delay between the detection and the successive signalling of the
alarm. If i3F=dor this is the delay to activate door open alarm
nPS Pressure switch number: (0

15) Number of activation of the pressure switch, during the “d#d”
interval, before signalling the alarm event (I2F= PAL). If the nPS activation in the did time is
reached, switch off and on the instrument to restart normal regulation.
odc Compressor and fan status when open door: no = normal; Fan = Fan OFF; CPr =
Compressor OFF; F_C = Compressor and fan OFF.
rrd Outputs restart after doA alarm: no = outputs not affected by the doA alarm; yES = outputs
restart with the doA alarm.
RTC SUBMENU (if present)
CbP Clock Presence (n÷y): it permits to disable or enable the clock;
Hur Current hour (0 ÷ 23 h)
Min Current minute (0 ÷ 59min)
dAY Current day (Sun ÷ SAt)
Hd1 First weekly holiday (Sun ÷ nu) Set the first day of the week which follows the holiday times.
Hd2 Second weekly holiday (Sun ÷ nu) Set the second day of the week which follows the holiday
times.
Hd3 Third weekly holiday (Sun ÷ nu) Set the third day of the week which follows the holiday times.
ILE Energy Saving cycle start during workdays: (0 ÷ 23h 50 min.) During the Energy Saving cycle
the set point is increased by the value in HES so that the operation set point is SET + HES.
dLE Energy Saving cycle length during workdays: (0 ÷ 24h 00 min.) Sets the duration of the
Energy Saving cycle on workdays.
ISE Energy Saving cycle start on holidays. (0 ÷ 23h 50 min.)
dSE Energy Saving cycle length on holidays (0 ÷ 24h 00 min.)
Ld1÷Ld6 Workday defrost start (0 ÷ 23h 50 min.) These parameters set the beginning of the 6
programmable defrost cycles during workdays. Ex. When Ld2 = 12.4 the second defrost starts at
12.40 during workdays.
Sd1÷Sd6 Holiday defrost start (0 ÷ 23h 50 min.) These parameters set the beginning of the 6
programmable defrost cycles on holidays. Ex. When Sd2 = 3.4 the second defrost starts at 3.40
on holidays.
ENERGY SAVING
HES Temperature increase during the Energy Saving cycle : (-30÷30°C / -54÷54°F) sets the
increasing value of the set point during the Energy Saving cycle.
PEL Energy saving activation when light is switched off: (n÷Y)
n= function disabled;
Lig= energy saving is activated when the light is switched off and vice versa;
AUS= energy saving is activated when the AUX is switched off and vice versa;
LEA= energy saving is activated when the light & the AUX relays are switched off and vice versa;
LAN MANAGEMENT
LMd Desfrost synchronisation: y= the section send a command to start defrost to oher controllers,
n= the section don’t send a global defrost command
dEM Type of end defrost: n= the of the LAN defrost are indipendent; y= the end of the defrost are
synchronisated;
LSP L.A.N. set-point synchronisation: y= the section set-point, when modified, is updated to the
same value on all the other sections; n= the set-point value is modified only in the local section
LdS L.A.N. display synchronisation: y= the value displayed by the section is sent to all the other
sections; n= the set-point value is modified only in the local section
LOF L.A.N. On/Off synchronisation this parameter states if the On/Off command of the section will
act on all the other ones too: y= the On/Off command is sent to all the other sections; n= the
On/Off command acts only in the local section
LLi L.A.N. light synchronisation this parameter states if the light command of the section will act
on all the other ones too: y= the light command is sent to all the other sections; n= the light
command acts only in the local section
LAU L.A.N. AUX output synchronisation this parameter states if the AUX command of the section
will act on all the other ones too: y= the light command is sent to all the other sections; n= the
light command acts only in the local section
LES L.A.N. energy saving synchronisation this parameter states if the energy saving command of
the section will act on all the other ones too: y= the Energy Saving command is sent to all the
other sections; n= the Energy Saving command acts only in the local section
LSd Remote probe display: this parameter states if the section has to display the local probe value
or the value coming from another section: y= the displayed value is the one coming from another
section (which has parameter LdS = y); n= the displayed value is the local probe one.
LCP P4 probe sent via LAN (n, y)
StM Cooling activation via LAN: n= not used; Y= a generic cooling requests from LAN activate the
solenoid valve connected to compressor relay;
ACE Cooling by LAN always enabled even if the compressor block: (n, y)

1592023220 XM660K_XM670K GB r5.4 2021.09.01 XM660K - XM670K 7/9
PROBE CONFIGURATION
P1C Probe 1 configuration: (nP –Ptc –ntc –CPC -PtM) nP= not present; PtC= Ptc; ntc= NTC; CPC=
NTC-US; PtM= Pt1000;
OF1 Probe 1 calibration: (-12.0

12.0°C/ -21

21°F) allows to adjust possible offset of the thermostat probe.
P2C Probe 2 configuration: (nP –Ptc –ntc –CPC -PtM) nP= not present; PtC= Ptc; ntc= NTC; CPC=
NTC-US; PtM= Pt1000;
OF2 Probe 2 calibration: (-12.0

12.0°C/ -21

21°F) allows to adjust possible offsets of the evaporator probe.
P3C Probe 3 configuration: (nP –Ptc –ntc –CPC -PtM) nP= not present; PtC= Ptc; ntc= NTC; CPC=
NTC-US; PtM= Pt1000;
OF3 Probe 3 calibration: (-12.0

12.0°C/ -21

21°F) allows to adjust possible offset of the probe 3.
P4C Probe 4 configuration: (nP –Ptc –ntc –CPC -PtM) nP= not present; PtC= Ptc; ntc= NTC; CPC=
NTC-US; PtM= Pt1000;;
OF4 Probe 4 calibration: (-12.0

12.0°C/ -21

21°F) allows to adjust possible offset of the probe 4.
SERVICE –OTHERS
LCL Light on during cleaning mode (n, y)
FCL Fan on during cleaning mode (n, y)
MAP Map used during standard operation (1°M, 2°M, 3°M, 4°M) It sets the map used by the
controller among the four possible maps
MP1 Alternate Map enabled by digital input or Modbus command (1°M, 2°M, 3°M, 4°M) It sets
the alternate map enabled by digital input or Modbus command among the four possible maps
CLt Coling time percentage: it shows the effective cooling time calculated by XM600 during
regulation;
tMd Time to next defrost: it shows time before the next defrost if interval defrost is selected;
LSn L.A.N. section number (1 ÷ 8) Shows the number of sections available in the L.A.N.
Lan L.A.N. serial address (1 ÷ LSn) Identifies the instrument address inside local network of
multiplexed cabinet controller.
Adr RS485 serial address (1÷247): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
br It sets the baud rate among: (96 = 9.6 bit/s; 192 = 19.2 bit/s)
EMU Previous versions emulation (2V8 , 3V8 , 4V2) It allows the controller to be used in a LAN of
controllers with previous versions:
2V8 = it emulates version 2.8
3V8 = it emulates version 3.8
4V2 = it emulates version 4.2
rEL Release software: (read only) Software version of the microprocessor.
SrL Software subrelease: (read only) for internal use
Ptb Parameter table: (read only) it shows the original code of the Dixell parameter map.
Pr2 Access to the protected parameter list (read only).
14. DIGITAL INPUTS
The XM600 series can support up to 3 free of voltage contact configurable digital inputs (depending on
the models). They are configurable via i#F parameter
14.1 GENERIC ALARM (EAL)
As soon as the digital input 1, 2, or 3 is activated the unit will wait for “d1d” or “d2d” or “d3d”time delay
before signalling the “EAL” alarm message. The outputs status doesn’t change. The alarm stops just after
the digital input is de-activated.
14.2 SERIOUS ALARM MODE (BAL)
When the digital input is activated, the unit will wait for “d1d” or “d2d” or “d3d” delay before signalling the
“BAL”alarm message. The relay outputs are switched OFF. The alarm will stop as soon as the digital
input is de-activated.
14.3 PRESSURE SWITCH (PAL)
If during the interval time set by “d1d” or “d2d” or “d3d” parameter, the pressure switch has reached the
number of activation of the “nPS” parameter, the “CA” pressure alarm message will be displayed. The
compressor and the regulation are stopped. When the digital input is ON the compressor is always OFF.
If the nPS activation in the d#d time is reached, switch off and on the instrument to restart normal
regulation.
14.4 DOOR SWITCH INPUT (dor)
It signals the door status and the corresponding relay output status through the “odc” parameter: no =
normal (any change); Fan = Fan OFF; CPr = Compressor OFF; F_C = Compressor and fan OFF. Since
the door is opened, after the delay time set through parameter “d#d”, the door alarm is enabled, the
display shows the message “dA” and the regulation restarts after rrd time. The alarm stops as soon as
the external digital input is disabled again. With the door open, the high and low temperature alarms are
disabled.
14.5 START DEFROST (DEF)
It executes a defrost if there are the right conditions. After the defrost is finished, the normal regulation
will restart only if the digital input is disabled otherwise the instrument will wait until the “Mdf” safety time
is expired.
14.6 RELAY AUX ACTUATION (AUS)
This function allows to turn ON and OFF the auxiliary relay by using the digital input as external switch.
14.7 RELAY LIGHT ACTUATION (LIG)
This function allows to turn ON and OFF the light relay by using the digital input as external switch.
14.8 REMOTE ON/OFF (ONF)
This function allows to switch ON and OFF the instrument.
14.9 FHU –NOT USED
This function allows to change the kind of regulation from cooling to heating and viceversa.
14.10 ENERGY SAVING INPUT (ES)
The Energy Saving function allows to change the set point value as the result of the SET+ HES
(parameter) sum. This function is enabled until the digital input is activated.
14.11 MAP SWITCHING (NT)
In this configuration, the digital input activates the map selected by the MP1 parameter.
The “MAP CHANGE” ModBus command has higher priority compared to the digital input.
14.12 CLEANING FUNCTION ACTIVATION (CLN)
In this configuration, the digital input activates the CLEANING function. It can be activated only if the
device is ON.
This function has the following characteristics:
•the display visualizes the “CLn” label
•The light status depends on the LCL parameter (no/yes), however the light can be modified both
via button and ModBus command.
•The fans status depends on the FCL parameter (no/yes), furthermore they are not thermo-
regulated (par.FST).
The “CLEANING MODE” ModBus command has higher priority compared to the digital input.
14.13 DEFROST END (DEN)
The digital input ends the defrost cycle in progress. The drip time will follow the defrost end. A further
defrost request with the digital input active won’t be managed.
14.14 DIGITAL INPUTS POLARITY
The digital inputs polarity depends on “I#P”parameters: CL : the digital input is activated by closing the
contact; OP : the digital input is activated by opening the contact.
15. USE OF THE PROGRAMMING “HOT KEY“ – 64 K
The XM units can UPLOAD or DOWNLOAD the parameter list
from its own E2 internal memory to the “Hot Key” and vice-
versa through a TTL connector.
15.1 DOWNLOAD (FROM THE “HOT KEY” TO THE INSTRUMENT)
1. Turn OFF the instrument by means of the ON/OFF key, insert the “Hot Key” and then turn the unit
ON.
2. Automatically the parameter list of the “Hot Key” is downloaded into the controller memory, the
“doL” message is blinking. After 10 seconds the instrument will restart working with the new
parameters. At the end of the data transfer phase the instrument displays the following messages:
“end“ for right programming. The instrument starts regularly with the new programming. “err” for
failed programming. In this case turn the unit off and then on if you want to restart the download
again or remove the “Hot key” to abort the operation.
15.2 UPLOAD (FROM THE INSTRUMENT TO THE “HOT KEY”)
1. When the XM unit is ON, insert the “Hot key” and push “UP” key.
2. The UPLOAD begins; the “uPL” message is blinking.
3. Remove the “Hot Key”.
At the end of the data transfer phase the instrument displays the following messages:
“end “ for right programming.
“err” for failed programming. In this case push “SET” key if you want to restart the programming
again or remove the not programmed “Hot key”.
16. TECHNICAL DATA
CX660 and CH660 keyboard
Housing: self extinguishing PC+ABS.
Case: CX660 facia 35x77 mm; depth 18mm; CH660 facia 38x80 mm; depth 18mm
Mounting: panel mounting in a 29x71 mm panel cut-out
Protection: IP20; Frontal protection: IP65
Power supply: from XM600K power module
Display: 3 digits, red LED, 14,2 mm high
Optional output: buzzer
Power modules
Housing: 8 DIN
Power supply: depending on the model 110Vac

10% - 230Vac

10%
Overvoltage Category: III
Rated power: 9VA max.
Rated Impulse Voltage: 2500V
Software class: A
Terminal connections: Screw terminal block

1,6 mm2heat-resistant wiring and 5.0mm Faston, wire
section <= a 2.5mm2
Data storing: on the non-volatile memory (EEPROM)
Type of action: 1B
Pollution Degree: 2
Ambient operating temperature: -10T60°C
Shipping and storage temperature: -40T85°C
Relative humidity: 20

85% (no condensing)
Resolution: 0,1 °C or 1°C or 1 °F (selectable)
Measuring and regulation range:
NTC / NTC-US probe: -40÷110°C (-58÷230°F).
PTC probe: -50÷150°C (-67 ÷ 302°F)
Pt1000 probe: -100 ÷ 100°C (-148 ÷ 212°F)
Accuracy (ambient temp. 25°C): ±0,5 °C ±1 digit
Digital inputs: 3 free of voltage
Inputs: up to 4 NTC/PTC/Pt1000 probes
Serial output: RS485 with ModBUS - RTU and LAN
Relay outputs: Total current on loads MAX. 16A
Solenoid Valve: relay SPST 5(3) A, 250Vac
defrost: relay SPST 16 A, 250Vac
fan: relay SPST 8 A, 250Vac
light: relay SPST 16 A, 250Vac
alarm (XM670K): SPDT relay 8 A, 250Vac
Aux (XM670K): SPST relay 8 A, 250Vac
Optional output (AnOUT) DEPENDING ON THE MODELS:
•PWM / Open Collector outputs: PWM or 12Vdc max 40mA
•Analog output: 4÷20mA or 0÷10V
Purpose of control: operating control
Construction of control: incorporated control, intended to be used in Class I or Class II equipment.

1592023220 XM660K_XM670K GB r5.4 2021.09.01 XM660K - XM670K 8/9
17. DEFAULT SETTING VALUES
Label
M1
M2
M3
M4
Menù
Parameter description
rtc
- - -
Pr1
Access to RTC submenu
SEC
LOC
- - -
LAN mode selection : Local or Global
SEt
2.0
2.0
-18.0
-18.0
- - -
Set point
Hy
2.0
2.0
2.0
2.0
Pr1
Differential
LS
-30
-30
-30
-30
Pr2
Minimum set point
US
10
10
10
10
Pr2
Maximum set point
odS
1
Pr2
Outputs activation delay at start up
AC
1
Pr2
Anti-short cycle delay
CCt
0.0
Pr2
Continous cycle duration
CCS
2.0
Pr2
Continuous cycle set point
Con
5
Pr2
Compressor ON time with faulty probe
CoF
10
Pr2
Compressor OFF time with faulty
probe
CF
°C
Pr2
Measurement unit: Celsius ,
Fahrenheit
rES
dE
Pr2
Resolution (only C) : decimal, integer
Lod
P1
Pr2
Local display: default display
rEd
P1
Pr1
Remote display: default display
dLy
0
Pr1
Display delay
rPA
P1
Pr1
Regulation probe A
rPb
nP
Pr1
Regulation probe B
rP3
nP
Pr2
Regulation probe 3
rP4
nP
Pr2
Regulation probe 4
rPd
rPA
Pr2
Temperature Regulation Strategy
rPE
100
Pr2
Virtual probe percentage (rPd=rAb)
dPA
P2
Pr2
Defrost probe A
dPb
nP
Pr2
Defrost probe B
tdF
EL
EL
EL
EL
Pr2
Kind of defrost: air, resistors, inversion
EdF
in
Pr2
Defrost mode: Clock or interval
Srt
150
Pr2
Differential for heater
Hyr
2.0
Pr2
Time out for heater (if temp > Srt)
tod
255
Pr2
Defrost with two probes
d2P
n
n
n
n
Pr2
Defrost with two probes
dtE
8.0
8.0
8.0
8.0
Pr1
First defrost termination temperature
dtS
8.0
8.0
8.0
8.0
Pr2
Second defrost termination
temperature
idF
6
6
6
6
Pr1
Interval between defrosts
idE
y
Pr2
Storage in EEPROM defrost interval
ndt
3
3
3
3
Pr2
Minimum Defrost Time
MdF
30
30
30
30
Pr2
Maximum defrost duration
dSd
0
Pr2
Delay for defrost on call
dFd
it
Pr2
Visualization during defrost
dAd
30
Pr2
Visualization delay for temperature
after defrost
Fdt
0
0
2
2
Pr2
Dripping time
dPo
n
Pr2
Defrost at power ON
dAF
0.0
Pr2
Delay defrost after freezing
Pdt
F-C
Pr2
Pump down type
Pdn
0
Pr2
Pump down duration
Ctd
6
6
6
6
Pr2
Differential for defrost start
nbd
4.0
4.0
4.0
4.0
Pr2
Minimum Compressor run time before
defrost
Mdb
16.0
16.0
16.0
16.0
Pr2
Maximum Compressor run time before
defrost
nct
-30.0
-30.0
-30.0
-30.0
Pr2
Minimum coil temperature to trigger a
defrost
FAP
P2
Pr2
Fan probe
FnC
O-y
o-y
o-n
o-n
Pr1
Fan operating mode
Fnd
0
0
5
5
Pr1
Fan delay after defrost
FCt
10
Pr2
Temperature differential to avoid short
cycles of fans
FSt
15.0
15.0
2.0
2.0
Pr1
Fan stop temperature
FHy
1.0
Pr2
Fan stop hysteresis
tFE
n
Pr2
Fan regulation by temperature in
defrost
Fod
0
Pr2
Fan activation time after defrost
(without compressor)
Fon
0
Pr2
Fan ON time
FoF
0
Pr2
Fan OFF time
trA
UAL
Pr2
Kind of regulation with PWM output
SOA
0
Pr2
Fixed speed for fan
SdP
30.0
Pr2
Default Dew Point value
ASr
1.0
Pr2
Differential for fan / offset for anti
sweat heater
PbA
5.0
Pr2
Proportional band for modulating
output
AMi
0
Pr2
Minimum output for modulating output
AMA
100
Pr2
Maximum output for modulating output
AMt
3
Pr2
1:Time with fan at maximum speed -
2: Time output ON anti sweat heater
rAL
tEr
Pr2
Probe for temperature alarm
ALC
Ab
Pr1
Temperature alarm configuration :
relative / absolute
Label
M1
M2
M3
M4
Menù
Parameter description
ALU
10
10
10
10
Pr1
High temperature alarm setting
ALL
-30
-30
-30
-30
Pr1
Low temperature alarm setting
AHy
1.0
Pr2
Differential for temperature alarm
ALd
15
15
15
15
Pr1
Temperature alarm delay
rA2
nP
Pr2
Probe for temperature alarm 2
A2U
150
150
150
150
Pr2
High temperature alarm 2 setting
A2L
-40
-40
-40
-40
Pr2
Low temperature alarm 2 setting
A2H
2
Pr2
Differential for temperature alarm 2
A2d
15
15
15
15
Pr2
Temperature alarm delay 2
dAO
1.0
1.0
1.0
1.0
Pr2
Delay of temperature alarm at start-up
EdA
60
Pr2
Alarm delay at the end of defrost
dot
30
Pr2
Temperature alarm exclusion after
door open
tbA
n
Pr2
Silencing alarm relay with buzzer
oA5*
ALr
Pr2
Relay 5 configuration
oA6*
AUS
Pr2
Relay 6 configuration
CoM
420
Pr2
Modulating output configuration
AOP
CL
Pr2
Alarm relay polarity
iAU
n
Pr2
Auxiliary output independent from
ON/OFF state
i1P
CL
Pr2
Digital input 1 polarity
i1F
dor
Pr1
Digital input 1 configuration
d1d
15
Pr1
Digital input 1 activation delay
i2P
CL
Pr2
Digital input 2 polarity
i2F
LiG
Pr1
Digital input 2 configuration
d2d
5
Pr1
Digital input 2 activation delay
i3P
CL
Pr2
Digital input 3 polarity
i3F
ES
Pr1
Digital input 3 configuration
d3d
0
Pr1
Digital input 3 activation delay
nPS
15
Pr1
Pressure switch number
OdC
F-C
Pr2
Compressor and fan status when open
door
rrd
30
Pr2
Outputs restart after door open alarm
CbP
y
Pr2
Clock presence
Hur
- - -
Pr1
Current hour
Min
- - -
Pr1
Current minutes
dAY
- - -
Pr1
Current day
Hd1
nu
Pr1
First weekly day
Hd2
nu
Pr1
Second weekly day
Hd3
nu
Pr1
Third weekly day
ILE
0.0
Pr1
Energy saving cycle start during workdays
dLE
0.0
Pr1
Energy saving cycle length during
workdays
ISE
0.0
Pr1
Energy saving cycle start during holidays
dSE
0.0
Pr1
Energy saving cycle length during
holidays
Ld1
6.0
Pr1
Workdays First defrost start
Ld2
13.0
Pr1
Workdays Second defrost start
(minimum as Ld1)
Ld3
21.0
Pr1
Workdays Third defrost start (minimum
as Ld2)
Ld4
nu
Pr1
Workdays Fourth defrost start
(minimum as Ld3)
Ld5
nu
Pr1
Workdays Fifth defrost start (minimum
as Ld4)
Ld6
nu
Pr1
Workdays Sixth defrost start (minimum
as Ld5)
Sd1
6.0
Pr1
Holidays First defrost start
Sd2
13.0
Pr1
Holidays Second defrost start
Sd3
21.0
Pr1
Holidays Third defrost start
Sd4
nu
Pr1
Holidays Fourth defrost start
Sd5
nu
Pr1
Holidays Fifth defrost start
Sd6
nu
Pr1
Holidays Sixth defrost start
HES
0.0
Pr1
Temperature increasing during Energy
Saving
PEL
n
Pr1
Energy saving activation when Light
switched off
LMd
y
Pr2
Defrost Synchronisation
dEM
y
Pr2
Defrost end Synchronisation
LSP
n
Pr2
SET-POINT Synchronisation
LdS
n
Pr2
Display Synchronisation (temperature
sent via LAN)
LOF
n
Pr2
ON/OFF Synchronisation
LLi
y
Pr2
Light Synchronisation
LAU
n
Pr2
AUX Synchronisation
LES
n
Pr2
Energy Saving Synchronisation
LSd
n
Pr2
Remote probe displaying
LCP
n
Pr2
P4 probe sent via LAN
StM
n
Pr2
Cooling request from LAN enable
compressor relay
ACE
n
Pr2
Cold Calling in LAN always enabled
even if the compressor block
P1C
ntc
Pr2
P1 configuration
OF1
0.0
Pr2
P1 calibration
P2C
ntc
Pr2
P2 configuration
OF2
0.0
Pr2
P2 calibration

1592023220 XM660K_XM670K GB r5.4 2021.09.01 XM660K - XM670K 9/9
Label
M1
M2
M3
M4
Menù
Parameter description
P3C
nu
Pr2
P3 configuration
OF3
0.0
Pr2
P3 calibration
P4C
nu
Pr2
P4 configuration
OF4
0.0
Pr2
P4 calibration
LCL
y
Pr2
Light on during cleaning mode
FCL
y
Pr2
Fan on during cleaning mode
MAP
1°M
Pr2
Map selection
MP1
1°M
Pr2
Map selection loaded by digital input
Adr
1
Pr1
Modbus address
br
96
Pr2
Baud Rate selection for ModBus :
9600 or 19200
EMU
nu
Pr2
Emulation previous version : 2V8 , 3V8
, 4V2
rEL
5.4
Pr2
Release code firmware (only read)
SrL
-
Pr2
Sub-release firmware (only read)
Ptb
-
Pr2
Map EEPROM ID
Pr2
321
Pr1
Password