Siemens RWF40.000A97 Compact Universal Controllers

Manufacturer : Siemens
Product No. : RWF40.000A97
Product Type : RWF40 Compact Universal Controllers
Data backup: EEPROM
Mains supply: AC 110…240 V +10 % / -10 %, 48…63 Hz
Power consumption: Max. 10 VA
Electrical connection: at the rear, via plug-in screw terminal strips, angled at 45°
Electrical safety: to EN 60730
Weight : 0.43 Kg
Shipping Weight : 2 Kg

The RWF40.000A97 is used primarily for the control of temperature or pressure in oil- or gas-fired heating plants. It is a compact modulating controller without position feedbackacting on the burner. An external switch can be used to change it to a 2-positioncontroller for the control of 2-stage burners. The integrated thermostat function switchesthe burner on and off. The thermostat (relay output 1) can be used as a thermal resetlimit thermostat conforming to DIN 3440. An adjustable response threshold is used toswitch to a higher burner output (high-fire operation).

Frequently asked questions：

Q1: What type of device is the Siemens RWF40.000A97?
A1: It is a compact universal controller designed for controlling temperature, process variables, and other tasks in industrial applications.
Q2: What is the mains supply voltage for this controller?
A2: The controller supports AC 110–240 V with a tolerance of +10% / –10%, and a frequency range of 48–63 Hz.
Q3: What is the maximum power consumption?
A3: The RWF40.000A97 maximum power consumption is 10 VA.
Q4: How is the RWF40.000A97 controller electrically connected?
A4: Electrical connections are made at the rear via plug-in screw terminal strips angled at 45° for secure and convenient wiring.

Product Applications
Heat Energy and Industrial Combustion Systems: As accessories for boilers and burners, they are used to precisely regulate the ratio of gas and air.
Industrial Furnaces and Kilns: Applied in metal smelting, heat treatment furnaces, annealing furnaces, etc., they control the furnace temperature through feedback from temperature sensors.
Drying and Heating Equipment: Used for textile scouring machines, industrial dryers, food drying, road construction machinery, etc., for constant heat control.
Municipal and Commercial Heating: Used for boiler cooking, bathing, and industrial steam in schools, bathrooms, hotels, etc.

Core Functions
Control Modes: Operates as a PID controller in modulating operation or provides threshold-based control in 2-stage operation.
Inputs: Supports up to three analog inputs (e.g., Pt100, Pt1000, or standard signals) and two binary inputs for potential-free contacts.
Outputs: Includes a 3-position output and a configurable analog output (0–10 V or 4–20 mA).
Weather Compensation: Can automatically switch to weather-dependent setpoint shifting when connected to a compatible outside sensor.

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