FTX00-610 is a PID temperature controller with built-in timer, works with thermocuple and RTD inputs, relay output for timer, it's ability to maintain the tempearture at preset time duration is the key features of this item, when temperature reach to SV, the timer will be triggered automatically and starts to counting, when the time duration elapsed, a relay will pull-in and generate a dry contact signal. RS-485 modbus communication is optional, 24VDC/AC souce is optional as well.