User Manual

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Siemens RXC39.5 – Room controller CM2N3856en_07
Building Technologies 2015-12-23
The yellow service LED shows the current operational status of the controller by
means of different flashing patterns (see the RXT10 user manual, CM110669).
The service pin is used to identify the controller in the commissioning phase. When
the pin is pressed the controller’s identification number is transmitted to the RXT10
commissioning and service tool.
Disposal
The devices are classified as waste electronic equipment in terms of the European
Directive 2012/19/EU
(WEEE) and should not be disposed of as unsorted municipal
waste.
The relevant national legal rules are to be adhered to.
Regarding disposal, use the systems setup for collecting electronic waste.
Observe all local and applicable laws.
Engineering notes
The Desigo RXC installation guide, document CA110334, contains the relevant
engineering information for the L
ONWORKS® bus (topology, bus repeaters, bus
termination, etc.) and for the selection and dimensions of connecting cables for the
supply voltage and field devices.
See “Connection diagrams” for information on connecting field devices.
The controller operates with an AC 24 V supply voltage (SELV). The supply cable
must be protected with at least 10 A.
The controlled devices (valve / damper actuators) are supplied directly from the
controller. The maximum load on the outputs must not be exceeded (see
“Technical data”).
This device has no circuit breakers for supply lines to external consumers (field power
supply)!
Line insulation must always be sufficient for the available rated voltage.
When forwarding supply voltage (for 24 V low voltage as well) to external
consumers, the wiring cross sections must at any rate be adapted to the
preswitched overcurrent protection device. Please comply under all circumstances
with local regulations.
The power consumption of the connected devices must be taken into account
when sizing the transformer.
The plug-in connection for the extension modules incorporates both the communi-
cations and the power supply. The power supply is limited to a maximum of two
extension modules. The possible combinations are determined by the available
applications.
See the Desigo RXC applications library, CA110300.
• The volt-free releasing relay output for the fan allows the switching of a load up
to AC 250 V, 2(2) A.
• The circuits must be externally fused (≤ 10 A) as there are no internal fuses.
• The cables connected to the room controller must be secured with cable ties.
Service LED
Service pin
AC 24 V supply
Caution
RXC40.1 and RXC41.1
extension modules
Volt-free
relay outputs
AC 230 V