... 2 analog inputs,1 relay output,1 analog output,1 open-collector output.(6)AVR:can output constant voltage automatically when input ... 4 terminals which can accept ON-OFF inputs* Programmable Analog Input: AI1 can accept input of 0~10V or 0/4~20mA.* Programmable ... Carrier Frequency: 0.5Hz~15.0Hz* Reference Frequency Source: Keypad, analog input, serial communication, multi-step speed, PID and so on. The ...