The RCU50 room temperature controller is a PID controller for CAV and VAV systems. It provides 0 to 10V heating or cooling output, supports automatic cold/hot switching, manual cold/hot switching, normal, energy-saving and standby three operating modes, and supports the work mode selection switch and adjustable cooling output minimum value limitation.
This manual describes the functions and operating modes of the Siemens RCU50 series temperature controllers, including normal, active and standby modes, as well as automatic and manual switching between heating and cooling. It also explains the signal inputs and outputs, such as 0‑10 V control signals and the use of external VAV controllers.
Installation instructions, wiring diagrams, technical specifications, and safety notes are provided to help users correctly mount the controller, connect power (AC 24 V), and configure DIP settings for the desired mode of operation.
| Supply voltage | AC 24 V |
|---|---|
| Frequency | 30/60 Hz |
| Maximum power consumption | 6 VA |
| Output signal range | 0–10 V |
| Operating temperature range | 0–50 °C |
| Maximum humidity | <95 % RH |
| Weight (RCUS0) | 0.22 kg |
| Color | White (NCS S 0502‑G, RAL 9003) |
The controller operates on AC 24 V with a 20 % tolerance.
The controller provides a 0 to 10 V output signal.