MacroAir Technologies AirLynk BACnet - Interfacing PLC to Devices

16 Configuration and Operation MacroAir AirLynk
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Rev Date: 071519
Interfacing PLC To Devices
3. Fan Connections to PLC (CN1)
Device Pins
PLC Pin #
Pin Assignment
CN1
Pin RS-485 +
Pin1
RS-485-2 +
Pin RS-485 -
Pin 2
RS-485-2 -
Pin GND
Pin 3
RS-485-2 GS
Figure 3: Power and RS-485 Connections (ref pg. 10)
4. Wiring Field Port to a BACnet MSTP BMS (CN19)
BMS RS-485
Wiring
PLC Pin #
Pin Assignment
CN19
RS-485 +
Pin 1
RS-485-1 +
RS-485 -
Pin 2
RS-485-1 -
-
Pin 3
RS-485-1 GS
Figure 4: Connection from PLC to RS-485 Field Network
(ref pg. 10)