China Analog/Digital Input/Output I/O Module Stc-112 (8AI, 2AO, 8DI, 4DO) with RS485 Modbus RTU, Find details about China Modbus I/O Module, I/O Expand Module from Analog/Digital Input/Output I/O Module Stc-112 (8AI, 2AO, 8DI, 4DO) with RS485 Modbus RTU