User Manual

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Siemens RXL24.1 – Room controller CM2N3878en_07
Building Technologies 2015-12-23
Disposal
The device is 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
Topology
Line or star
NO closed loops
Cable length
Max. 1000 m
Cable length
E.g. YCYM 2 x 2 x 0.8 mm
Number of RXL Controllers per
Network
Max. 45
Bus supply
Up to 45 RXL-controllers:
5WG1 125-1AB12
Bus terminator
Not required
The RXL2… room controllers operate with a supply voltage of AC 24 V.
The controlled devices (damper actuators) receive their power directly from the
room controller. This means that a separate AC 24 V supply is not necessary for
the field devices.
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 simultaneous load on outputs Y1 … Y4 must not exceed 9.5 VA.
Y1 (heating) 2 thermic valve actuators, type STP72E 5 W
Y2 (cooling) 2 thermic valve actuators, type STP72E 5 W
The maximum load is 9.5 VA for the heating sequence and 9.5 VA for the cooling
sequence.
This is acceptable because the two sequences never operate at the same time.
Bus
AC 24 V
supply cables
Caution
AC 24 V triac outputs
Example: