Critical Environment Technologies FCS - Wiring Digital Inputs (LPT-P and LPT-M Transmitters)

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FCS - Installation Manual Rev. C | 2021.12
For more information on the LNK-AI, refer to the LNK-AI Analog Input Peripheral Device
Operation Manual.
6.13 Wiring Digital Inputs (CGAS-D, LPT-P & LPT-M Transmitters)
FCS LAN Terminal
The FCS provides 24 VDC (low voltage power) at the two LAN Terminals on the main board.
Each LAN terminal offers an A and B connection. Multiple digital transmitters must be
connected to each other in a daisy-chain fashion to ensure robust data communications.
From one digital device to the next digital device, A goes to A; B goes to B; GND goes to GND;
24V goes to 24V. In addition, the RS-485 bus must be terminated at the beginning and the
end of the wire run so the signal waves are absorbed rather than reected back.