... controller 1.4-channel PID 2.Multiple Installation 3.SSR OUTPUT AI-7048 High Performance Intelligent 2 Channel PID ... Sampling rate: 250msControl period : 0.48 sec / 4 channelsOutput : SSR voltage, 12VDC/20mA each channelTemperature shift : ≤0.01%FS /° ... voltage : Between power, relay contact or signal terminal ≥2300VDC;Between SSR voltage output and thermocouple input ≥600VDCPower supply : 100~240VAC, ...