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14. EN - List of terminals
Digital inputs, terminals 4-17, are of extra-low voltage type.
Analogue inputs, terminals 18-19 have an input impedance of 66 kΩ.
Wiring terminal
Function
1,2,3
Connections for EIA -485
4,5
External stop
6,7
External fire/smoke function 1
8,9
External fire/smoke function 2
10,11
External alarm 1
12,13
External alarm 2
14,15
External low speed
16,17
External high speed
18,19
Demand control
20,21
Circulation pump, heating circuit
22,23
Circulation pump, cooling
circuit or cooling on/off, 1-step
operation
24,25
Cooling, on/off, 2-step operation
26,27
In-service indication
28,29,30
Damper control
31,32
Control voltage
33,34
Reference voltage
35,36,37,38
Control, recirculation damper
The max permissible common load on terminals 31-32, outputs for Heat/Cool and damper output (terminals 28-30) is 50 VA.
SD
Remarks
1= Communication connection A/RT+, 2= Communication connection B/RT–, 3= GND/COM.
Stops the air handling unit by opening the circuit. On delivery, this function is fitted with a jumper.
If the connection is interrupted, the air handling unit will stop.
External fire and smoke function. On delivery, this function is fitted with a jumper. If the
connection is interrupted, the function will trip and initiate an alarm.
External fire and smoke function. On delivery, this function is fitted with a jumper. If the
connection is interrupted, the function will trip and initiate an alarm.
External contact function. Optional: Normally open/normally closed.
External contact function. Optional: Normally open/normally closed.
External contact function. Overrides the time switch from stop to low speed operation.
External contact function. Overrides the time switch from stop or low speed to high speed
operation.
Input for 0-10 VDC. The input signal influences the supply air/extract airflow setpoint if the unit is
operating in the demand control mode. For connection of a sensor, for example CO
Independent contact, max. 5 A/AC1, 2 A/AC3, 250 VAC. Closes on a heating load.
Independent contact, max. 5 A/AC1, 2 A/AC3, 250 VAC. Closes on a cooling load.
Independent contact, max. 5 A/AC1, 2 A/AC3, 250 VAC. Closes on a cooling load.
Independent contact, max. 5 A/AC1, 2 A/AC3, 250 VAC. Closes when the unit is operating.
24 VAC. 28= Controlled 24 VAC (G), 29= 24 VAC (G), 30= 24 VAC (G0).
24 VAC control voltage. Terminals 31-32 are loaded with a total of 16 VA. Opened by means of the
safety isolating switch.
Output for constant 10 VDC. Max. permissible load: 8 mA.
The recirculation damper can be loaded with max. 2 mA at 10 VDC. 35= 24 V AC (G), 36= 24 V AC
(G0), 37= 0-10 V DC control signal, 38= 0-10 VDC feedback signal.
The max. permissible load on the
corresponding connection is 16 VA.
A
B
, CO and VOC
2
23
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