... frequency, millivolt, thermocouple, thermal resistance.2. Signal full- scale accuracy: ± 0.2%. 3.Optoelectronic devices are used between channels , which are ... 4-20mA for transmitter output. Communication 1. Standard serial communication interface: RS-485 or RS-232C. 2. It supports the ... , such as the iFIX,MCGS, etc. 3. Use USB2.0 interface for transfer storage and backup of history records. It can ...