OPTO 22 G4LC32, User Manual

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G4LC32 User’s Guide
COMMUNICATIONS AND CABLES
SERIAL COMMUNICATIONS
Overview
The G4LC32 has four serial ports available to connect to host devices, remote I/O units, and other external
equipment.
COM0 and COM1: RS-232
RS-485 2-wire half-duplex
or RS-485 4-wire full-duplex
Can be used as host ports
COM2 and COM3: RS-485 2-wire half-duplex
or RS-485 4-wire full-duplex
Can be used as host ports
The G4LC32 and remote I/O units (or any RS-485 device) can be separated by distances to 3,000 ft. (even longer
distance with an AC38 repeater). A single shielded twisted-pair of wire provides communications over a RS-422/485
communication network to up to 100 (256 with repeaters) remote I/O units.
Important: Connectors wired for other Mistic 200 controllers may not be compatible with the G4LC32. Use the
connectors provided and refer to the configuration label for wiring information.
Cables and Connectors
RS-422/485 Cables
Shielded, twisted-pair cable is recommended for the communications wiring.
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CHAPTER 5