Includes standard relay outputs (for burner release and 3-position control) and an optional modulating output (DC 0...10 V, 4...20 mA). Physical Interface:
Proper installation is crucial for the longevity of the controller. According to the RWF40 Manual (Technical Literature), the unit is designed for panel mounting and should be placed in an environment that meets the specified climatic conditions.
: Allows for a primary setpoint and an external setpoint shift or changeover via binary inputs. Auto/Manual Control : Users can manually drive the burner output or engage the Self-setting (Auto-tune) function to optimize PID parameters automatically. Limit Comparator
We often wire the RWF40 to maintain a fixed temperature (e.g., "Keep the water at 180°F"). But the manual hints at a much smarter way to run a plant. siemens rwf40 manual
Relay outputs for burner control (open/close or stage 1/stage 2) Front panel: IP65; Rear housing: IP20 Operating Temp. -20°C to +50°C 3. Installation and Mounting
Connect your temperature sensor (e.g., Pt100 RTD) or pressure transducer (e.g., 4-20mA sensor) here.
is a supplement for OEMs and installers that focuses on menu levels (User, Parameter, and Configuration). Includes standard relay outputs (for burner release and
Two digital inputs for potential-free contacts, used to change operating modes or activate setpoint shifts.
The manual stresses one critical point: Read chapter 1 (safety instructions) before installation. Failure to comply voids the warranty and risks equipment damage.
From the Basic Display (showing actual value), press the ▲ or ▼ button. The setpoint will flash, then you can adjust it with the ▲/▼ buttons and confirm by pressing PGM or waiting. : Allows for a primary setpoint and an
The Siemens RWF40 includes an automatic self-tuning function. This software feature analyzes the controlled system's response to establish the ideal PID parameters automatically. How to Activate Self-Tuning Ensure the plant is cold or well below the target setpoint.
Unlike a standard PID controller that outputs a continuous signal (e.g., 6.5 V), the three-position output uses two relays: