12V 8CH RS485 Relay Modbus RTU Protocol Serial Port Remote Control Switch for PLC Control Board

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Features:
8 channels relay.
Support modbus pol input.
Under the mobus command mode, it can support up to 64 devices in parallel.
Under the delay command, the maximum delay is 255 seconds.
Mobus commands can be made serial hyperterminal (serial assistant) or modbus poll enter.
Open close momentary self-locking interlock delay 6 commands.