... Input: various wave form pulse signal(proximity switch,photoelectrical switch or AC signal,etc),contact switch,encoder,etc,used to measure ... automatically;Opical isolation for input and output,high anti-interference.4, Output:up to 3 alarm output with various output ... low value ,intervals,etc;analogue output 4-20mA or 0-10mA with range settable.5, RS232 or RS485 Modbus RTU protocol,connectable with ...