New DC 12V 24V 8DI 8DO RS485 Modbus RTU Relay Module Switch Control Board Support standard Modbus RTU command, function code, write 05/06/15/16 read 01/02/03. MODBUS RTU Function Code 01 05 15 02 03 06 16. Under the MODBUS command mode, it can support up to 64 devices in parallel. byJuly 4, 2026
