Electrical Control SystemChina Tengcon T-912 (12AI, 4AO, 14DI, 6DO) Transistor Output PLC with Modbus RTU and Modbus TCP, Find details about China Programmable Logic Controller, PLC Controller from Tengcon T-912 (12AI, 4AO, 14DI, 6DO) Transistor Output PLC with Modbus RTU and Modbus TCP