| Brand | Unbranded/Generic |
|---|---|
| Type | relay |
| Compatible Brand | Universal |
Check the listing for details. 4CH 12V Modbus RTU PC UART RS485 Relay Board for PLC Lamp LED PTZ Camera Control. Condition: New. Listed at 9.98 USD. 1 xDC 12V 4Ch RS485 Modbus AT command Relay Board. Modbus Poll. Under the MODBUS command ,the maximum delay is 255 seconds. 7 Under the MODBUS command mode, it can support up to 32 devices in parallel.