Dwyer Instruments Inc., Love Controls Div.The Series 4B 1/4 DIN temperature/process controller is designed to accept thermocouple, RTD, current or voltage input and provide dual outputs for control. The units can be programmed for on/off, PID, auto-tuning or manual tuning control methods. The PID control is supported with 64 ramp/soak actions. Two additional alarm outputs are standard. It offers RS-485 communication as standard with up to 247 available addresses.