Siemens Rwf40 Manual (2024)

The Siemens RWF40 is a compact universal controller designed specifically for temperature or pressure control in heat-generating plants, typically used with modulating or multistage burners. Core Manual Resources

6. Alarm Functions and Limit Monitoring

The RWF40 includes two configurable alarm relays. According to the manual (Section 7.3), common alarm configurations include: siemens rwf40 manual

Feature Title:

“RWF40 Quick-Config & Diagnostic Assistant” The Siemens RWF40 is a compact universal controller

Verification: The manual recommends applying a known current (e.g., 12 mA) using a calibrator and checking that the display reads 8.0 bar (midpoint of 0-16). For an SSR drive, the cycle time is

• For an SSR drive, the cycle time is usually set very short (e.g., 1 to 3 seconds).
• Note: If using a mechanical relay, the cycle time must be set much longer (e.g., 20-30 seconds) to prevent damage. The "solid" capability allows you to lower this time for better accuracy.

Terminal Assignments (Critical excerpt from the manual):

• Terminals 1-2: Power supply (100-240 V AC, 50/60 Hz) or low voltage (24 V AC/DC depending on the sub-variant).
• Terminals 3-4: Analog input 1 (Pt100, 4-20 mA, or 0-10 V – configurable).
• Terminals 5-6: Analog input 2 (usually for setpoint compensation or flow feedback).
• Terminals 7-8: Relay output 1 (controller output for stage 1 or modulating signal).
• Terminals 9-10: Relay output 2 (stage 2 or alarm).
• Terminals 11-12-13: Analog output (0-10 V or 0/4-20 mA for actuator positioning).

Example output for real scenario:

The Siemens RWF40 Go to product viewer dialog for this item.

This article serves as a deep-dive reference, synthesizing the most critical aspects of the RWF40 manual. We will cover hardware setup, configuration sequences, three-position step control, analog input scaling, and common error codes.