Modbus/Bacnet; Connection Of Optional Air Quality Sensors - Helios AIR1 XC Serie Montage- Und Betriebsvorschrift

Installation and Operating Instructions
Compact Ventilation Units AIR1 XC
4. Connect the other end of the HMI cable to the display (see wiring diagram).
AIR1 BE-ECO

2 .2 .3 Modbus/Bacnet

AIR1 XC units have a rs485 connection and Ethernet connection. The rs485 connection is used for the internal com-
munication of the pressure sensors. The Ethernet connection can be used for the communication with building control
systems.
– ModBus TCP
– Bacnet IP

2 .2 .4 Connection of optional air quality sensors

The following air quality sensors can be connected for sensor-controlled operation:
KWL-CO2
KWL-VOC
KWL-FTF
AIR1-CO2 K
Connection of air quality sensors:
The power supply (24 V DC) must be connected according to the wiring diagram (see wiring diagram).
The signal cables are connected according to the wiring diagram via the analogue inputs AI2, AI3 and AI4.
Connection information:
• If a room temperature sensor is connected to analogue input AI2, only analogue inputs AI3 and AI4 are available for
air quality sensors.
• Up to 3 different or same types of sensors can be connected to a ventilation unit with 3 free analogue inputs. The
highest ventilation requirement has priority.
• If more than 3 sensors are connected, the signal converter AIR1-SK with 6 analogue inputs and one analogue out-
put is available. Only the same type of sensor can be connected to a signal converter.
• If multiple sensors are connected, the current carrying capacity of the internal power supply unit must be taken into
account.
33.25 W power is available for connecting the air quality sensors. However, this power is reduced depending on the
additional accessories connected.1
For the connection of the sensors, the available 24 V supply on the basis of the table must therefore be observed.
The DC power available for 24 V accessory components is 33.25 W.
Accessory components (AIR1 XC Units)
AIR1-BE TOUCH
AIR1-BE ECO
AIR1-ENH
AIR1-NH WW
AIR1-KR KW
AIR1-JVK
AIR1-ULK
KWL-CO2
KWL-FTF
KWL-VOC
AIR1-CO2 K
RMK
AIR1 BE-TOUCH
Ref. no. 04272
Ref. no. 04274
Ref. no. 04273
Ref. no. 07124
Controller connection
Controller connection
Electrical after heater
Water heater (Mixing valve)
Cold water cooling (valve)
Volume control dampers (2 x)
Recirculation damper (RH 5000)
CO2-sensor
Humidity / temperature sensor
Mixed gas sensor
CO2-channel sensor
Duct smoke sensor
10
Power required
6 W
0,24 W
6 W
6 W
6 W
5 W (2 x 2,5 W)
1 W
4,8 W
0,7 W
1 W
2 W
0,6 W
EN
Fig .13