FRIEDHELM LOH Rittal 3359 Series User manual

Enclosure cooling unit
Assembly and operating instructions
3359.xxx
3273.xxx
3382.xxx
3383.xxx
3384.xxx
3385.xxx
3386.xxx
3387.xxx

Contents
EN
2Rittal enclosure cooling unit
Contents
1 Notes on documentation .................. 3
1.1 CE labelling.................................................. 3
1.2 Storing the documents................................. 3
1.3 Symbols used in these operating instructions 3
1.4 Other applicable documents ........................ 3
2 Safety notes ..................................... 3
3 Device description ............................ 3
3.1 TÜV-tested output measurement to
DIN EN 14511 .............................................. 4
3.2 Functional description .................................. 4
3.2.1 How it works ......................................................... 4
3.2.2 Control .................................................................. 4
3.2.3 Bus mode (e-Comfort controller only) .................... 4
3.2.4 Safety devices ....................................................... 5
3.2.5 Condensation ....................................................... 5
3.2.6 Filter mats ............................................................. 5
3.2.7 Door limit switch ................................................... 5
3.2.8 Additional interface X3 .......................................... 5
3.3 Proper use, foreseeable misuse ................... 5
3.4 Scope of supply........................................... 6
4 Assembly and connection ................ 6
4.1 Choosing the installation site........................ 6
4.2 Notes on assembly ...................................... 6
4.2.1 General ................................................................. 6
4.2.2 Layout of the electronic components in the
enclosure .............................................................. 6
4.3 Fitting the cooling unit .................................. 7
4.3.1 Making the cut-outs .............................................. 7
4.3.2 Top mounting of the cooling unit ........................... 7
4.4 Connecting the condensate discharge ......... 8
4.5 Notes on electrical installation ...................... 9
4.5.1 Connection data ................................................... 9
4.5.2 Overvoltage protection and supply line load .......... 9
4.5.3 Three-phase devices ............................................. 9
4.5.4 Door limit switch ................................................... 9
4.5.5 Notes on the flicker standard ................................ 9
4.5.6 Potential equalisation ............................................ 9
4.6 Making the electrical connection ................ 10
4.6.1 Bus connection (only when interconnecting several
units with a Comfort controller) ............................ 10
4.6.2 Connection X3 for serial interface ........................ 10
4.6.3 Installing the power supply .................................. 11
4.7 Finalising assembly .................................... 12
4.7.1 Installing the filter media ...................................... 12
4.7.2 Fitting the cooling unit ......................................... 12
4.7.3 Setting the filter mat monitor ............................... 12
5 Start-up .......................................... 13
6 Operation ....................................... 13
6.1 Control using the e-Comfort controller ....... 13
6.1.1 Properties ........................................................... 13
6.1.2 Eco mode ........................................................... 13
6.1.3 Launching test mode .......................................... 14
6.1.4 General information about programming ............. 14
6.1.5 Editable parameters ............................................ 15
6.1.6 Programming overview ....................................... 16
6.1.7 Defining system messages for evaluation ............ 17
6.1.8 Setting the master/slave identifier ........................ 18
6.1.9 Evaluating system messages .............................. 18
6.1.10 Resetting the e-Comfort controller ...................... 20
7 Inspection and maintenance .......... 20
7.1 Compressed air cleaning............................ 20
8 Storage and disposal ..................... 22
9 Technical details ............................ 22
9.1 Technical specifications.............................. 22
9.2 Performance diagrams............................... 25
10 List of spare parts .......................... 26
11 Appendix ....................................... 28
11.1 Cut-out and hole sizes ............................... 28
11.1.1 Dimensions for assembly .................................... 28
11.2 Electrical wiring plan................................... 29

Rittal enclosure cooling unit 3
1 Notes on documentation
EN
1 Notes on documentation
1.1 CE labelling
Rittal GmbH & Co. KG confirms the conformity of the
cooling unit with the European Union's Machinery Di-
rective 2006/42/EC and EMC Directive 2014/30/EC. A
corresponding declaration of conformity has been is-
sued. This can be found at the end of this document, or
on the Rittal homepage.
1.2 Storing the documents
The assembly and operating instructions as well as all
other applicable documents are an integral part of the
product. They must be issued to everyone who works
with the unit and must always be available and on hand
for operating and maintenance personnel.
1.3 Symbols used in these operating in-
structions
The following symbols are used in this documentation:
This symbol indicates an "action point" and shows that
you should perform an operation or procedure.
1.4 Other applicable documents
Assembly and operating instructions in paper and digital
format are available for the unit types described here.
We cannot accept any liability for damage associated
with failure to observe these instructions. Where applica-
ble, the instructions for any accessories used also apply.
2 Safety notes
Please observe the following general safety notes when
assembling and operating the unit:
– Assembly, installation and servicing may only be per-
formed by properly trained specialists.
– Do not obstruct the air inlet and air outlet of the cooling
unit inside and outside the enclosure (see sec-
tion4.2.2 "Layout of the electronic components in the
enclosure").
– The heat loss of the components installed in the enclo-
sure must not exceed the specific useful cooling pow-
er of the cooling unit.
– The cooling unit must always be transported in a hori-
zontal position.
– Use only original spare parts and accessories.
– Do not make any changes to the cooling unit other
than those described in these instructions or associat-
ed instructions.
– Risk of burns! On cooling units with automatic con-
densate evaporation, the surface of the thermal ele-
ment will get very hot during operation, and will remain
so for some time afterwards.
– The mains connector of the cooling unit must only be
connected and disconnected with the system de-en-
ergised. Connect the protective device specified on
the rating plate.
3 Device description
Depending on the model chosen, your cooling unit may
vary in appearance from the illustrations contained in
these instructions. However, the functions are identical
in principle.
Danger!
A dangerous situation in which failure to
comply with the instructions will result in
death or severe injury.
Warning!
A dangerous situation which may cause
death or serious injury if the instructions
are not followed.
Caution!
A dangerous situation which may lead to
(minor) injuries if the instructions are not
followed.
Note:
Important notices and indication of situations
which may result in material damage.

3 Device description
EN
4Rittal enclosure cooling unit
Fig. 1: Device description
Key
1Enclosure
2 Air outlet holes
3 Rating plate
4 Louvred grille for air inlet
5Display
6 X2 master-slave connection (underside of the unit)
7 X1 terminal strip (underside of the unit)
8 X3 optional serial interface (underside of the unit)
9 Dispatch bag
10 Twin-threaded bolt
11 Condenser
12 Condensate discharge
3.1 TÜV-tested output measurement to
DIN EN 14511
All TopTherm cooling units in the output range from 300
to 4000 W are tested to the latest EN 14511-1-4:2013-
12 standard by independent test institute TÜV Nord.
This means you have peace of mind about the design of
the climate control solution and you can be sure you are
getting the performance you are paying for.
3.2 Functional description
Enclosure cooling units are designed to dissipate heat
from enclosures by cooling the air inside the enclosure
and so protect the temperature-sensitive components.
It is mounted on the roof of an enclosure.
3.2.1 How it works
The cooling unit (compression refrigeration system)
comprises four main components (see fig. 2): the evap-
orator (1), the refrigerant compressor (2), the condenser
(3), and the control or expansion valve (4), which are
connected by suitable pipework.
This circuit is filled with a readily boiling substance, the
refrigerant. The refrigerant R134a (CH2FCF3) is chlorine-
free. Its Ozone Depletion Potential (ODP) is 0, making it
very eco-friendly. A filter dryer (5) which is integrated into
the hermetically sealed cooling circuit provides effective
protection against moisture, acid, dirt particles, and for-
eign bodies within the cooling circuit.
Fig. 2: Cooling circuit
In the evaporator coil (1), the liquid refrigerant is convert-
ed to a gaseous state. The energy needed for this pur-
pose is taken from the enclosure air in the form of heat,
which has the effect of cooling the enclosure air. In the
compressor (2), the refrigerant is heavily compressed,
so that it achieves a higher temperature inside the con-
denser (3) than the ambient air. This means that excess
heat may be emitted to the ambient air via the surface of
the condenser, as a result of which the temperature of
the refrigerant drops and it is converted back into liquid.
It is re-injected into the evaporator coil via a thermostatic
expansion valve (4), which causes it to cool down fur-
ther, and is then once again able to absorb the energy
from the enclosure air in the evaporator coil. The whole
cycle begins again.
3.2.2 Control
Rittal enclosure cooling units are fitted with a controller
for setting the functions of the cooling unit (display plus
extended functions, see section6 "Operation").
3.2.3 Bus mode (e-Comfort controller only)
The serial unit interface X2 allows you to create a bus
connection with up to ten cooling units using the master-
slave cable (shielded, four-wire cable, Model No.
3124.100). This allows you to implement the following
functions:
– Parallel unit control (the cooling units in the network
can be switched on and off simultaneously)
– Parallel door status message ("door open")
– Parallel collective fault message
Data is exchanged via the master-slave connection.
During commissioning, assign an address to each unit
that also includes the identifier "master" or "slave".
3
6, 7, 8
12
4
11
10
9
5
2
1
PSAH
pressure
switch
Condenser fan
Expansion valve (4)
Temperature
control
Filter dryer (5)
Internal circuit
Compressor (2)
External circuit
Evaporator fan
Evaporator coil (1)
Condenser (3)

Rittal enclosure cooling unit 5
3 Device description
EN
3.2.4 Safety devices
– In the cooling cycle, the cooling unit has a tested pres-
sure switch to EN 12 263 which is set to maximum PS
(permissible pressure); this operates via an automatic
reset device whenever the pressure drops again.
– Temperature monitoring prevents the evaporator coil
from icing over. If there is a risk of icing, the compres-
sor switches itself off and automatically switches itself
back on again at higher temperatures.
– The refrigerant compressor and the fans are equipped
with thermal winding shields to protect against excess
current and excess temperatures.
– In order to allow a reduction of pressure inside the
compressor and hence a safe restart, once it has been
switched off (e.g. upon reaching the set temperature
via the door limit switch function or via de-energising),
the device will switch back on with a delay of 180 sec-
onds.
– The device has floating contacts on the connection
pins (terminals 3 – 5), via which system messages
from the device may be polled, e.g. using a PLC (2x
normally open contacts, e-Comfort controller).
3.2.5 Condensation
At high levels of humidity and low temperatures inside
the enclosure, condensation may form on the evapora-
tor coil.
The cooling units have an automatic electrical conden-
sate evaporator. The thermal component used for this
purpose is based on self-regulating PTC technology.
Condensate arising on the evaporator coil is collected in
a tank in the internal circuit of the cooling unit. When the
water level rises, the water enters the PTC thermal com-
ponent and is evaporated (through-flow heater princi-
ple). The water vapour streams out of the cooling unit
with the airflow from the external fan.
The PTC thermal component is permanently connected
and has no switchpoint. It is protected against short-cir-
cuits with miniature fuses (F1.1, F1.2). If the fuse has
tripped, any condensation is drained off via the safety
overflow.
In the case of a malfunction or a failure in the thermal
component, the condensation water is routed out of the
unit via a drain pipe at the side or rear for safety reasons.
For this purpose, a hose must be connected to the con-
densate nozzle (see section4.4 "Connecting the con-
densate discharge"). Condensate hoses are available as
accessories (refer also to the accessories section in the
Rittal Catalogue).
3.2.6 Filter mats
The entire cooling unit condenser is covered with a dirt-
repelling, easy-to-clean RiNano coating. In many appli-
cations, therefore, the use of filter media is unnecessary,
particularly with dry dusts.
For dry, coarse dust and lint in the ambient air, we rec-
ommend installing an additional PU foam filter mat (avail-
able as an accessory) in the cooling unit. Depending on
the incidence of dust, you will need to replace the filter
mat from time to time.
For air containing oil condensate, we recommend the
use of metal filters (also available as an accessory).
These may be cleaned with suitable detergents and re-
used.
Function of the filter mat monitor (with e-Comfort
controller only):
Dirt on the filter mat is automatically determined by
measuring the temperature difference in the external cir-
cuit of the cooling unit. As the level of filter mat soiling in-
creases, the temperature difference will increase. The
setpoint value of the temperature difference in the exter-
nal circuit adapts automatically to the relevant operating
points in the performance diagrams. Hence there is no
need to readjust the setpoint value for different unit op-
erating points.
3.2.7 Door limit switch
The cooling unit may be operated with a floating door
limit switch connected. The door limit switch is not in-
cluded with the supply (available as an accessory, Model
No. 4127.010).
The door limit switch function causes the fans and the
compressor in the cooling unit to be switched off after
approximately 15 seconds when the enclosure door is
opened (contacts 1 and 2 closed). This prevents the for-
mation of condensation inside the enclosure while the
enclosure door is open. In order to prevent damage to
the unit, it is equipped with an ON delay: The evaporator
fan cuts back in with a delay of approximately 15 sec-
onds after the door has been closed, while the condens-
er fan and compressor switch on after approximately
3minutes.
3.2.8 Additional interface X3
An additional interface card may be connected to the 9-
pole SUB-D connector X3 in order to incorporate the
cooling unit into higher-level monitoring systems (availa-
ble as an accessory, interface card Model No.
3124.200).
3.3 Proper use, foreseeable misuse
The cooling unit is only intended for cooling connected
enclosures. Any other use is not permitted.
– The unit must not be installed and operated in loca-
tions which are accessible to the general public (see
DIN EN 60335-2-40, paragraph 3.119).
Note:
No external voltage may be applied to the
door contacts (terminals 1 and 2).
Note:
The electrical signals at the interface are of
an extra-low voltage (not extra-low safety
voltages to EN 60 335).

4 Assembly and connection
EN
6Rittal enclosure cooling unit
– The unit is designed solely for stationary use.
The cooling unit is state of the art and built according to
recognised safety regulations. Nevertheless, improper
use can pose a threat to the life and limb of the user or
third parties, or result in possible damage to the system
and other property.
Consequently, the cooling unit must only be used prop-
erly and in a technically sound condition! Any malfunc-
tions which impair safety should be rectified immediate-
ly.
Proper use also includes the observance of the docu-
mentation provided, and compliance with the inspection
and maintenance conditions.
Rittal GmbH & Co. KG is not liable for any damage which
may result from failure to comply with the documenta-
tion provided. The same applies to failure to comply with
the valid documentation for any accessories used.
Inappropriate use may be dangerous. Examples of inap-
propriate include:
– Use of the cooling unit over long periods with the en-
closure open.
– Use of impermissible tools.
– Improper operation.
– Improper rectification of malfunctions.
– Use of accessories not approved by Rittal GmbH &
Co. KG.
3.4 Scope of supply
The unit is supplied in a packaging unit in a fully assem-
bled state.
Please check the scope of supply for completeness.
4 Assembly and connection
4.1 Choosing the installation site
When choosing the installation site for the enclosure,
please observe the following:
– The site for the enclosure and the positioning of the
cooling unit must be carefully selected so as to ensure
good ventilation. Depending on the siting of the unit, if
several units are installed directly adjacent to one an-
other, the distance from the wall must be at least
200 mm.
– The cooling unit must be installed and operated in a
horizontal position (maximum deviation: 2°).
– The site must be free from excessive dirt, aggressive
ambient conditions and moisture.
– The ambient temperature must be within the limits
specified on the rating plate.
– It must be possible to fit a condensate discharge (see
section4.4 "Connecting the condensate discharge").
– The mains connection data as stated on the rating
plate of the unit must be guaranteed.
4.2 Notes on assembly
4.2.1 General
– Check the packaging carefully for signs of damage.
Traces of oil on damaged packaging are an indication
of refrigerant loss and leakages. Any packaging dam-
age may be the cause of a subsequent functional fail-
ure.
– The enclosure must be sealed on all sides (IP 54). In-
creased condensation will occur if the enclosure is not
airtight.
– In order to avoid excessive condensation inside the
enclosure, we recommend installing a door limit
switch (e.g. 4127.010) which deactivates the cooling
unit when the enclosure door is opened (see sec-
tion3.2.7 "Door limit switch").
4.2.2 Layout of the electronic components in the
enclosure
Qty. Description
1 Enclosure cooling unit
1
1
1
1
1
1
1
Dispatch bag:
– Sealing plate (3273.xxx, 3383.xxx, 3384.xxx,
3385.xxx)
– Sealing frame
– Plug-in terminal strip
– Assembly and operating instructions
– Angular connector
– Screw-in nozzle
3 Blind rivet (3386.xxx, 3387.xxx)
1 Drilling template
Tab. 1: Scope of supply
Note:
Risk of condensation!
When arranging the components inside the
enclosure, please ensure that the cold air-
flow from the cooling unit is not directed at
active components. Please also ensure that
the cold airflow is not directed at the warm
exhaust airflow from active
components such as converters. This may
lead to an air short-circuit and therefore pre-
vent adequate climate control, or may even
cause the cooling unit’s internal safety de-
vices to cease cooling operation.

Rittal enclosure cooling unit 7
4 Assembly and connection
EN
Fig. 3: Never direct the cold airflow at active components
Exercise particular caution with the airflow from the
blowers of built-in electronic components (see fig. 3).
Components for targeted air routing are available as ac-
cessories – please refer to the Rittal Catalogue.
Fig. 4: Targeted air routing inside the enclosure
Fig. 5: Cover bungs
4.3 Fitting the cooling unit
The enclosure cooling unit is mounted on top of the en-
closure roof:
To this end, cut-outs must be made in the roof plate as
per the drilling template included with the supply.
4.3.1 Making the cut-outs
Affix the supplied drilling template to the roof of the en-
closure using adhesive tape.
There are dimensioning lines on the drilling template to
suit the installation type for your cooling unit.
Make the cut-outs including the line width as per the
drilling template.
Deburr the cut-outs.
4.3.2 Top mounting of the cooling unit
Affix the supplied sealing frame onto the cut out roof
plate.
Note:
When using an air duct system, care must
be taken to ensure that it is laid straight and
without kinks wherever possible. This mini-
mises the resistance to the cold airflow.
It is important to ensure even air circulation
inside the enclosure. Under no circum-
stances should air inlet and outlet openings
be obstructed, otherwise the cooling perfor-
mance of the unit will be reduced. Ensure a
suitable distance from electronic compo-
nents and other installed enclosures so that
the required air circulation is not obstructed
and prevented.
One cold air outlet from the cooling unit
must be kept open at all times when operat-
ing with the air duct, to prevent the accumu-
lation of cold air inside the unit.
Note:
When using the cover bungs, only a maxi-
mum of 1 or 2 cold air outlet openings may
be sealed, depending on the unit type.
Note:
Pre-configured, reinforced roof plates with
cut-outs to match your enclosure are avail-
able as accessories; refer to the Rittal Cata-
logue.
Caution!
Carefully deburr all cut-outs to prevent
injuries caused by sharp edges.
3273.xxx
3383.xxx
3384.xxx
3385.xxx
3359.xxx
3382.xxx
3386.xxx
3387.xxx
max. 2x max. 1x

4 Assembly and connection
EN
8Rittal enclosure cooling unit
Fig. 6: Sealing frame on roof plate
Affix the supplied sealing plate to the bottom of the
plastic base of the cooling unit (3273.xxx, 3383.xxx,
3384.xxx, 3385.xxx).
Fig. 7: Sealing plate underneath the plastic base of the cooling
unit
Mount the cooling unit on the enclosure roof.
Screw the supplied twin-threaded bolts into the core
holes in the plastic base on the underside of the cool-
ing unit with a maximum of 5 Nm.
Secure the unit using the supplied washers and nuts.
Fig. 8: Roof plate reinforcement for the TS 8 enclosure
Accessories for roof plate reinforcement with TS:
TS roof plates
Quick-change frame
Punched rail
U nut
Fastening bracket
Threaded block
(refer also to Accessories in the Rittal Catalogue)
4.4 Connecting the condensate discharge
A condensate discharge hose (Ø 1/2˝) may be fitted to
the cooling unit.
The condensate discharge
– must be laid with a suitable and constant gradient (no
siphoning)
– must be laid without kinks
– must not have a reduced cross-section if extended
The condensate hose is available as an accessory (refer
also to Accessories in the Rittal Catalogue).
Fig. 9: Connecting the condensate discharge
Connect a suitable hose to one of the two condensate
nozzles and secure using a hose clip.
The condensate nozzle that is not required should be
sealed.
Lay the condensate hose, e.g. into a drain.
Fig. 10: Laying the condensate discharge
Note:
In order to achieve a permanent seal be-
tween the cooling unit and the enclosure,
the mounting surface should be reinforced
or supported if necessary. This is particular-
ly applicable with large roof areas.
½"

Rittal enclosure cooling unit 9
4 Assembly and connection
EN
4.5 Notes on electrical installation
When performing the electrical installation, it is important
to observe all valid national and regional regulations as
well as the provisions of the responsible power supply
company. The electrical installation may only be carried
out by a qualified electrician who is responsible for com-
pliance with the applicable standards and regulations.
4.5.1 Connection data
– The connected voltage and frequency must corre-
spond to the values stated on the rating plate.
– The cooling unit must be connected to the mains via
an all-pin isolating device, which ensures at least
3 mm contact opening when switched off.
– No additional temperature control may be connected
upstream of the unit at the supply end.
– Install the protective device specified on the rating
plate to protect the line and equipment from short-cir-
cuits.
– The mains connection must ensure low-noise poten-
tial equalisation.
4.5.2 Overvoltage protection and supply line load
– The unit does not have its own overvoltage protection.
Measures must be taken by the operator at the supply
end to ensure effective lightning and overvoltage pro-
tection. The mains voltage must not exceed a toler-
ance of ±10%.
– In accordance with IEC 61 000-3-11, the unit is in-
tended solely for use at sites with a continuous cur-
rent-carrying capacity (incoming mains power supply)
of more than 100 A per phase and with a supply volt-
age of 400/230 V. If necessary, the power supply
company must be consulted to ensure that the contin-
uous current-carrying capacity at the point of connec-
tion to the public grid is sufficient for connection of
such a unit.
– The fans and compressors in single- and three-phase
units are intrinsically safe (thermal winding protection).
The same also applies to all transformer versions and
to special-voltage units which are likewise equipped
with a transformer.
– Install the protective device specified on the rating
plate to protect the line and equipment from short-cir-
cuits (miniature circuit-breaker with appropriate char-
acteristic – e.g. "K" characteristic – or gG standard
type slow fuse, circuit-breaker for plant or transformer
protection). Select a suitable circuit-breaker in accord-
ance with the information specified on the rating plate:
Set it to the minimum specified value. This will achieve
the best short-circuit protection for cables and equip-
ment.
Example: Specified setting range 6.3 – 10 A; set to
6.3 A.
4.5.3 Three-phase devices
– The electrical connection for devices in the three-
phase version MUST be made with a clockwise rotat-
ing field.
– The three-phase version must be connected to a TN
network with star earthing via a circuit-breaker for
plant protection (current setting as per the rating
plate). Three-phase units with special voltages must
be protected with a circuit-breaker for transformer
protection (category AC-3) as per the rating plate.
– Units designed for three phase 400/460 V feature ad-
ditional monitoring of the rotary field or the absence of
a phase. If the rotary field is incorrect or a phase is ab-
sent, the unit will not run.
4.5.4 Door limit switch
– Each door limit switch must only be assigned to one
cooling unit.
– Several door limit switches may be connected in par-
allel to one cooling unit.
– The minimum cross-section for the connection cable
is 0.3 mm2for a cable length of 2 m.
We recommend the use of a shielded cable.
– The line resistance to the door limit switch must not
exceed a maximum of 50 .
– The door limit switch only supports a floating connec-
tion; no external voltages.
– The contact of the door limit switch must be closed
when the door is open.
The safety extra-low voltage for the door limit switch is
provided by the internal power pack: Current approx.
30 mA DC.
Connect the door limit switch to terminals 1 and 2 of
the connector.
4.5.5 Notes on the flicker standard
The flicker limits specified in standard EN 61 000-3-3 or
-3-11 are adhered to, provided the supply impedance is
less than approx. 1.5 .
Where necessary, the unit operator should measure the
connected impedance or consult the responsible power
supply company. If there is no way of influencing the
supply impedance and sensitive installed components
(e.g. BUS) are subjected to interference, a line reactor or
starting-current limiting device should be connected up-
stream of the cooling unit to restrict the startup current
of the cooling unit.
4.5.6 Potential equalisation
If, for EMC reasons, the unit is to be integrated into the
customer’s existing potential equalisation system, a
conductor with a larger nominal cross-section can be
connected to the potential equalisation connection point
(attachment points) on the roof-mounted cooling units.
According to the standard, the PE conductor in the
mains connection cable is not classified as an equipo-
tential bonding conductor.

4 Assembly and connection
EN
10 Rittal enclosure cooling unit
Fig. 11: Connection point, potential equalisation
4.6 Making the electrical connection
4.6.1 Bus connection
(only when interconnecting several units
with a Comfort controller)
When using several cooling units, the serial device inter-
face X2 can be used to connect up to ten cooling units
with the bus cable (Model No. 3124.100).
When interconnecting, please note the following:
– De-energise the cooling units to be connected
– Ensure proper electrical insulation
– Make sure the cables are not laid in parallel to power
lines
– Make sure that the lines are short
4.6.2 Connection X3 for serial interface
The interface card (Model No. 3124.200) may be con-
nected to X3. This is used to evaluate system messages
in a PLC, for remotely setting parameters and monitor-
ing, or for integration into the facility management sys-
tem.
Fig. 12: Connection example: Master-slave operation
Key
1 Serial interface (Model No. 3124.200)
2 Serial interface cable
3 Master-slave bus cable (Model No. 3124.100)
RTT Rittal TopTherm cooling units
X1 Supply connection/door limit switch/alarms
X2 Master/slave connection Sub-D, 9-pole
X3 Serial interface Sub-D, 9-pole
St. Sub-D connector, 9-pole
Bu. Sub-D jack, 9-pole
Adr. Address
Note:
The electrical signals at the X2 interface are
of an extra-low voltage (not extra-low safety
voltages in accordance with EN 60 335-1).
Note:
With the last slave unit in the group, do not,
under any circumstances, connect the re-
maining socket of the Y cable 3124.100 into
interface X3 of the cooling unit!
X2
CMC
I/O unit
RTT
Master
Adr.: 09
X1
X2 X3
X1
X2 X3
X1
X2 X3
X1
X2 X3
X2 X3 X2
X2
X2 X2
X2
X2
St. St. St.
Bu.
St.
Bu.
X2
Adr.: 11 Adr.: 12RTT
Slave
RTT
Slave
Adr.: 19RTT
Slave
St.
Bu.
St.
Bu.
3
2
1