Supports 8-channel differential signals, and supports the Modbus Protocol. Each channel can be set up independently of its input range, outside the C-4018R+ support module in addition to the above-mentioned thermocouple input, also supports the 4~20mA and 20mA current inputs. Measure current input without an external resistor, just setting the internal jumpers. 8 channels can be set up independently for current/thermocouple signal input mode. Support high differential input, 8-channel input signal is isolated, and strong anti-interference ability. All devices using imported devices all products are subject to high temperature aging call 72 hours to ensure product quality.