1 connection when connecting the ES2-HB/THB.)Control method ON/OFF control or 2-PID control (with auto-tuning)Linear current output *1 4 to 20 mA DC/0 to 20 mA DC, load 500 O max., resolution approx. 10,000Altitude 2,000 m max.Recommended fuse T2A, 250 VAC, time lag, low-breaking capacity