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The MOD-COM4 is a modular unit capable of up to 4 x RS232 ports, also configurable for RS422 and RS485.
Front of the module has two 6-pin connectors, the top row and bottom row.
Each row can be configured as either:
Note that when using any RS232 mode in combination with RS485 or RS422 (any duplex type), the RS232 must be on ports 3 and/or 4 (bottom row).
RS232 can never be in ports 1 or 2 (top row) when using alongside RS485 or RS422 (bottom row).
For more details on the MOD-COM4 port configuration options, please see the MOD-COM4 CFLink documentation.
2 x RS232 without flow control
1 x RS232 with flow control
1 x RS485 half-duplex
1 x RS485/422 full-duplex
The rear of every module contains a module port, used to connect the module into the modular controller base unit (DIN-MOD4, etc).
The pinout for this port is not published (as it has no benefit to any user).