VDH MC 785 KLIMA User manual
Description : MC 785 KLIMA 0-100C Thermo/Hygrostat Doc.nr.: 080631
Type: MANUAL Number of pages: 16 Version: V1.0
File: Do080631 MC785 KLIMA 0_100 v10
EN.wpd
Software: MC785KLIMA100 Version: V1.00
By: HN Date: 14-03-2008
VDH Products BV - Roden - Holland Signed: File: Doc'08
MC 785 KLIMA
0-100C
User manual
(Wall and Panel mount)
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 2 of 16
The information contained in this document is assumed to be accurate. However, VDH Products BV does
not accept any liability for eventual mistakes or errors, and retains the right to adapt or change this
document without notice.
Table of contents
1. Technical specifications ..................................................... 3
2. Functional specifications .................................................... 5
3. Control ................................................................. 6
4. Programming internal settings ................................................ 7
5. Operation relay outputs .................................................... 10
6. Sensor calibration ........................................................ 11
7. Alarms ................................................................. 11
8. Front .................................................................. 12
9. Connection diagrams ...................................................... 13
10. Dimensions ............................................................. 15
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 3 of 16
1. Technical specifications
General
Type : MC 785 KLIMA
Wall mount version:
Housing : Grey plastic
Material : Polystyrol 454h KG 2 natur BASF
Dimensions : 213 x 180 x 85mm (whd)
Front : Polycarbonate (IP-44)
Panel mount version:
Housing : Steel case for panel mount
Material : Steel silver grey painted
Dimensions : 217 x 155 x 85mm (whd)
Panel cut : min. 208 x 146mm (wh)
Front : Polycarbonate (IP-44)
Temperature range : 0/+100C per 0,1C
Rel. humidity range : 0/+100% RH per 0,1% RH
Power supply : 230 Vac; 50/60 Hz (-10/+5%).
Power consumption : 9 VA
Operating temperature : -20/+50C
Operating rel. humidity : 10/+90 % RH not condensing
Accuracy : ± 0,5 % of the range
Front
Display : 4-digit digital display for measured temperature
4-digit digital display for temperature set point
4-digit digital display for measured RH
4-digit digital display for RH set point
LED's : COOL = LED Relay cooling active
HEAT = LED Relay heating active
DEHUM = LED Relay dehumidifying active
HUM = LED Relay humidifying active
= LED Alarm active (flashing)
= LED Day mode active
= LED Night mode active
Keys : ON/OFF = On/Off key controller
SET = Set point push button
= Up key
= Down key
PRG = Program key
RESET ALARM = Alarm reset key
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 4 of 16
In- and Outputs
Sensors : Temperature sensor (Pt-100, 3-wire to DIN/IEC 751)
RH sensor (0/+1 Vdc = 0/+100% RH)
Digital inputs : Day/night input (potential free input contact)
External alarm input (potential free input contact)
Spare input (potential free input contact)
Analog outputs : 2x 0/+10Vdc, Rbmin 10Kohm, programmable.
Relay outputs : RY1 Extra relay (C/NO/NC, 250Vac/10A not inductive)
Options extra relay (adjustable with parameter 20);
P20=0 Fail safe alarm (normal C-NO is closed and
during alarm C-NC is closed)
P20=1 Control alarm (normal C-NC is closed and
during alarm C-NO is closed)
P20=2 Function Cooling
P20=3 Function Heating
P20=4 Function Dehumidifying
P20=5 Function Humidifying
The following relays have a central common;
RY2 Dehumidifying(NO, 250Vac/10A not inductive)
RY3 Humidifying (NO, 250Vac/10A not inductive)
RY4 Heating (NO, 250Vac/10A not inductive)
RY5 Cooling (NO/NC, 250Vac/10A not inductive)
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 5 of 16
2. Functional specifications
The MC 785 KLIMA has the following control functions: cooling, heating, dehumidifying and
humidifying. Further more the controller has an alarm relay, which is activated when the alarm levels
are exceeded or a sensor is broken.
The MC 785 KLIMA has two analog outputs with a range of 0/+10Vdc, these are controlled by three
controllers.
With Out-1 is controlled by Control-1 and Out-2 is controlled by the highest value of Control-2 and
Control-3.
The functions of these controllers are programmable as measuring signal, set point signal or a P(I)
control for the cooling, heating, humidifying or dehumidifying.
The controller has two digital input contacts.
The first contact is used as day/night input and the second contact is used as external alarm.
The selection of the above mentioned settings is done via the Internal Parameters.
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 6 of 16
3. Control
During normal operation the upper displays show the measured temperature and measured rel.
humidity and the lower displays show the temperature set point and the RH set point.
Changing the temperature set point.
Push the SET key next to the temperature set point display. The set point starts flashing. The set
point can be changed with the UP and DOWN key. By pushing the SET key once again, the set point
shows continuously in the display.
Is the MC 785 KLIMA in the day mode (DAY LED on) and should the night set point be watched or
changed, push the UP or DOWN key and next on the SET key. The LED of the other mode flashes,
the set point appears flashing in the display. Changing of the set point again with the UP or DOWN
keys and acknowledged with the SET key.
In the same way the day set point can be watched or changed if the MC 785 KLIMA is in the night
mode.
Changing of the RH set point.
Push the SET key next to the RH set point display. The set point starts flashing and can be changed
with the UP or DOWN keys. By pressing the SET key again the set point appears continuously in the
display.
If the instrument is in the day mode (DAG LED on) and the night set point needs to watched or
changed, push the UP or DOWN key and next push the SET key. The LED of the other mode flashes,
the set point appears flashing in the display. Changing of this set point again with the UP or DOWN
keys and acknowledged with the SET key.
In the same way the day set point can be watched or changed if the MC 785 KLIMA is in the night
mode.
Resetting the alarm.
As soon as an alarm situation occurs and a failure message appears in the temperature display can,
by pushing the RESET ALARM key, the alarm be reset.
The error message remains in the display, till the cause of the failure is solved.
Day/night input.
If the day/night input is closed, the MC 785 KLIMA switches from day to night mode. The night LED
light. If the input is opened, the controller switches back to the day mode.
External alarm input.
If the external alarm input is closed, an alarm message appears in the display. The alarm relais is
activated. By pressing the ALARM RESET key, the alarm relay can be reset. The error message
remains in the display, until the external alarm input is opened again.
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 7 of 16
4. Programming internal settings
By pressing the PRG and RESET ALARM key at the same time for more than 5 seconds, the Internal
Parameter menu is entered. In the display appears a P with a number behind it. With the UP or
DOWN key the required parameter is selected.
If the required parameter is reached, can by pushing the PRG key, the value of the parameter be
watched. By simultaneously pressing the PRG with the UP or DOWN key, the value can be adjusted.
After releasing the keys, the parameter number appears again in the display.
If during 30 seconds no key is touched, the display turn back to the normal operation mode.
Parameter table.
Number Description Range Unit Default
P 01
P 02
P 03
P 04
P 05
P 06
P 07
P 08
Differential cooling
Offset cooling
Differential heating
Offset heating
Diff. dehumidifying
Offset dehumidifying
Diff. humidifying
Offset humidifying
0.1..15
-15..+15
0.1..15
-15..+15
0.1..15
-15..+15
0.1..15
-15..+15
°C
°C
°C
°C
% RH
% RH
% RH
% RH
0.5
0.0
0.5
0.0
1.0
0.0
1.0
0.0
P 10
P 11 Offset temp. sensor
Offset RH sensor -10/+10
-15/+15 °C
% RH 0.0
0.0
P 20
P 21
P 22
Function extra relay
0 = fail safe alarm
1 = control alarm
2 = cooling
3 = heating
4 = dehumidifying
5 = humidifying
6 = fail safe alarm not
resettable
7 = control alarm not
resettable
8 = extra relay; On when
controller is on and off
when controller is off
Diff. extra relay
Offset extra relay
0..8
0.1..15
-15..+15
-
-
-
0
0.5
0.0
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 8 of 16
Number Description Range Unit Default
P 30
P 31
P 32
P 33
P 34
P 35
P 36
Minimum setting
temperature set point
Maximum setting
temperature set point
Read-out above -10°C
per 1°C
Read-out below -10°C
per 1°C
Minimum setting
RH set point
Maximum setting
RH set point
Read out per 1% RH
0..+100
0..+100
0 = No
1 = Yes
0 = No
1 = Yes
0..100
0..100
0 = No
1 = Yes
°C
°C
-
-
% RH
% RH
-
0.0
+100.0
0
1
0
100
0
P 40
P 41
P 42
P 43
P 44
P 45
P 46
Type temperature alarm
0 = No alarm
1 = Absolute alarm
2 = Relative to setp.
Minimum alarm temp.
Maximum alarm temp.
Minimum alarm delay
Maximum alarm delay
Temperature control
off at minimum alarm
Temperature control
off at maximum alarm
0..2
0..+100
0..+100
0..99
0..99
0 = No
1 = Yes
0 = No
1 = Yes
-
°C
°C
Minutes
Minutes
-
-
1
0.0
+100.0
0
0
0
0
P 50
P 51
P 52
P 53
P 54
P 55
P 56
Type RH alarm
0 = No alarm
1 = Absolute
2 = Relative to setp.
Minimum RH alarm
Maximum RH alarm
Minimum alarm delay
Maximum alarm delay
RH control off at
minimum alarm
RH control off at
maximum alarm
0..2
-100..100
0..100
0..99
0..99
0 = No
1 = Yes
0 = No
1 = Yes
-
% RH
% RH
Minutes
Minutes
-
-
1
0.0
100.0
0
0
0
0
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 9 of 16
Number Description Range Unit Default
P 60
P 61
P 62
P 63
P 64
P 65
Function control-1=out1
0 = Measured temp.
1 = Measured RH
2 = Temperature setp.
3 = RH set point
4 = P(I) cooling
5 = P(I) heating
6 = P(I) dehumidifying
7 = P(I) humidifying
0 V output at
10 V output at
Proportional range
Offset prop. range
Interval value
(999 give only P)
0..7
-100..+100
-100..+100
0.1..15
-15..+15
1..999
-
-
-
-
-
Minutes
0
-0.0
+100.0
1.0
0.0
999
P 70
P 71
P 72
P 73
P 74
P 75
Function control-2>out2
0 = Measured temp.
1 = Measured RH
2 = Temperature setp.
3 = RH set point
4 = P(I) cooling
5 = P(I) heating
6 = P(I) dehumidifying
7 = P(I) humidifying
0 V output at
10 V output at
Proportional range
Offset prop. range
Interval value
(999 gives only P)
0..7
-100..+100
-100..+100
0.1..15
-15..+15
1..999
-
-
-
-
-
Minutes
0
0.0
+100.0
1.0
0.0
999
P 80
P 83
P 84
P 85
Function control-3>out2
0 = 0Vdc (not active)
1 = P(I) cooling
2 = P(I) heating
3 = P(I) dehumidifying
4 = P(I) humidifying
Proportional range
Offset prop. range
Interval value
(999 gives only P)
0..4
0.1..15
-15..+15
1..999
-
-
-
Minutes
0
1.0
0.0
999
P 90
P 91
P 95
P 96
Analog out-1 as
Pulse/Pause control
Pulse/Pause cycle-time1
Analog out-2 as
Pulse/Pause control
Pulse/Pause cycle time2
0 = No
1 = Yes
5..240
0 = No
1 = Yes
5..240
-
Sec.
-
Sec.
0
20
0
20
P 100 Complete control off
at external alarm 0 = No
1 = Yes - 0
P 105
P 106
P 107
Software version nr.
Serial number
Production date
-
-
-
-
-
Year/w
-
-
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 10 of 16
5. Operation relay outputs
Operation of the cooling and heating.
The cooling (RY5) switches if the temperature is higher than set point + offset cooling +
differential cooling and switches off if the temperature is lower than set point + offset cooling.
The heating (RY4) switches if the temperature is lower than set point + offset heating - differential
heating and switches off id the temperature is higher than set point + offset heating.
Operation of the humidifying and dehumidifying functions
The dehumidifying Relay (RY2) switches on if the RH is higher than set point + offset dehumidify +
differential dehumidify and switches off if the RH is lower than set point + offset dehumidify.
The humidifying Relay (RY3) switches on if the RH is lower than the set point + offset humidify -
differential humidify and switches off if the RH is lower than set point + offset humidify.
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 11 of 16
6. Sensor calibration
With parameters P10 and P11 can the temperature and RH sensor be calibrated. Indicates the
temperature sensor e.g. 0,2C too much, the offset (P 10) should be set at -0,2C.
7. Alarms
If the extra relay is set as watch alarm (parameter P20=0), in normal mode the relay is on and drops
during alarm. In this mode also an alarm is given if the power supply is lost. If the extra relay is
programmed as control alarm (P20=1), in normal mode the relay is off and is switches on during
alarm.
During alarm the alarm LED on the front flashes. Depending on the setting of the Internal Parameters
the control will stop or continue.
An alarm can be caused by:
Temperature alarm : tLO = Minimum temperature alarm
tHI = Maximum temperature alarm
RH alarm : rLO = Minimum RH alarm
rHI = Maximum RH alarm
External alarm : F1 = External alarm
Sensor failure : E1 = Temperature sensor broken
E2 = RH sensor broken
The temperature alarm messages tLO, tHI, E1 and external alarm message F1 are displayed in the
temperature display (left top). The RH alarm messages rLO, rHI and E2 are shown in the RH-display
(right top).
By pressing the RESET ALARM key the extra relay will, if configured as alarm relay, be reset. The
error message remains during the failure in the display. Also the alarm LED will continue to flash.
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 12 of 16
8. Front
Front view MC 785 - KLIMA wall-mounting drawing 960581
Front view MC785-KLIMA panel mounting drawing 961365
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 13 of 16
9. Connection diagrams
Connections MC 785 - KLIMA wall-mounting drawing 021743
Several RH-sensors can be connected:
RH95-2, LC95-2 or RH970 humidity sensors
(Also for panel mounting)
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 14 of 16
Connections MC785-KLIMA panel-mounting drawing 021742
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 15 of 16
10. Dimensions
Dimensions MC785-KLIMA wall-mounting drawing 940024
User manual Document Nr. : 080631 Version : V1.0
MC 785 KLIMA 0-100CClient : General Page : 16 of 16
Dimensions MC785-KLIMA panel-mounting drawing 961271
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