32 Channel DC 12V/24V 20A RS485/Ethernet Modbus Rtu Relay Board For PLC IO Board
MODBUS RTU old command 03 06 16. MODBUS RTU new command 01 05 03 06 16. 4 MODBUS old command (default) supports 03 06 16 function code. 7 In MODBUS command mode, it can support up to 64 devices in parallel.