Siemens RWF5 Temperature Controller

  • RWF50.20A9 is a universal controller with 3-position output, thermal shock protection
  • Same as RWF50.20A9 with analog output
  • Same as RWF50.30A9 with Modbus, setpoint changeover, setpoint shifting, outdoor air reset and limit comparator
  • Same as RWF55.50A9 plus Profibus-DP interface


Siemens RWF50 Temperature Controller

The RWF50… is used primarily for the control of temperature or pressure in oil or gas fired heating plants. Depending on the model, it is has a compact 3-position controller without feedback of angular positioning or as a modulating controller with an analog output. An external switch is provided to convert it to a 2-position controller for controlling 2-stage burners. The built-in thermostat function switches the burner on and off.

In summary, some features are, it has two 4-digit 7-segment displays for the actual value (red) and the setpoint (green). In addition, RWF50.2 has a 3-position output consisting of 2 relays to open or close a controlling element. Also, the RWF50.3 has an analog output.

In modulating mode, the RWF50… operates as a PID controller. In 2-stage mode, the RWF50… provides control based on the set switching threshold. Using the binary input, a change to a second setpoint can be made or the setpoint can be shifted.  In conclusion, standard feature is a self-setting function used to determine the PID control parameters.

The controller insert measures 48 x 48 x 104 mm and is especially suited for installation in control panels. All electrical connections are made via screw terminals at the rear of the unit.

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Technical Documentation

RWF5 Temperature Controller

PDF Downloads:

RWF50 Tech doc

RWF55 Tech doc