User Manual

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Siemens RXL21.1, RXL22.1 Room controllers CM2N3877en_09
Building Technologies 2015-12-23
Application
The RXL21.1 and RXL22.1 room controllers are optimized for control of fan-coil
systems in individual rooms.
The following options are available with fan-coil systems:
• RXL21.1: Single-speed to 3-speed automatic fan control
• RXL22.1: Single-speed to 3-speed automatic fan control
with integrated relay for electric re-heater
The application of each controller is determined by the application software.
The controllers are delivered with a fixed set of applications, each of which contains
various individual applications. The relevant application is selected and activated during
commissioning using one of the following tools:
• Synco ACS
• "HandyTool" (the QAX34.3 room unit includes a tool function which allows you to set
the parameters of the connected RXL cotroller)
Unlike the RXB controllers, the RXL controllers do NOT support the use of spare inputs
and outputs by the building automation and control system.
Functions
The room controller functions are determined by the selected application and its
parameters, and by the input/output configuration.
For details, refer to the FNC description of functions, document CA110785.
When RXL controllers are integrated into a Desigo building automation and control
system, or into a Synco system, additional functions become available such as time
scheduling, central control of setpoints, etc.
No use of spare
inputs/outputs