The ATR243 4-20mA Temperature Controller with a Modbus option. The ATR243 Temperature Controller can take 1 or 2 inputs. The inputs can be programmed for 4-20mA, thermocouples, RTD, Voltage and Thermistor inputs. The ATR243 has two 4 digit displays one for the Process variable and the other for the Setpoint. The ATR243 has 4-20mA and 0-10V outputs an option for up to 3 relays or Solid State Output. The ATR243 is 1/4 Din standard 48 x 48 mm and is able to withstand environmental conditions up to IP65 with the optional gasket. The ATR243 can be programmed with PC based software and multiple units can be cloned with the use of a memory card enabling high-speed configuration. The PC based software can also be used to monitor several Temperature Controllers. Desired control is maintained with PID and auto-tuning.