RLU2 is a universal controller for ventilation, air conditioning and refrigeration equipment. It is used to process control variables such as temperature, relative/absolute humidity, pressure/pressure differential, airflow, indoor air quality and enthalpy. It has pre-set standard applications and is freely programmable to suit related models and supports P-, PI- or PID modes.
This manual describes the features and functions of the Siemens RLU2 general controller, including P‑, PI‑ and PID‑control modes, temperature and humidity regulation, and signal input options. It also provides guidance for installing the controller in DIN rail or panel mounting, wiring diagrams, and safety requirements.
Technical data such as power rating, input voltage, maximum load current, operating temperature and humidity limits are listed, along with details on terminal assignments and external signal compatibility. This manual is written in Chinese.
| Power rating | 5 VA (RLU210, RLU222) |
|---|---|
| Operating temperature range | -25 °C to +70 °C |
| Maximum humidity | <95 % RH |
It can operate in P‑, PI‑ or PID‑control modes.
The device works from –25 °C to +70 °C and up to 95 % relative humidity.