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Siemens
RXC32 – Room controller for VAV systems
CA2N3845en_06
Building Technologies
2013-06-18
Disposal
The devices are classified as waste electronic equipment in terms of the European
Directive 2002/96/EC (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
ON
W
ORKS
® 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 / PELV). The supply
cable must be protected with at least 10
A.
The controlled devices (valves and 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
simultaneous
load on outputs Y3… Y6 must not exceed 24 VA.
•
The maximum load on each output must not exceed 12 VA.
Equipment Y1, Y2
1 3-position motorised actuator GDB…1E
2 VA
Y3 (Cooling)
2 thermic valve actuators, type STP72E
6 W
Y4 (Heating)
2 thermic valve actuators, type STP72E
6 W
Simultaneous load:
2 motorised actuators (both ON continuously)
4 VA
2 thermic valve actuators *
6 W (12 W) **
10 W (16 W)
* The heating and cooling sequences are never operative simultaneously. Therefore,
only the actuators for one of the two sequences need to be included when
calculating the total load.
** When cold, thermic valve actuators have a consumption of approximately 6 W. A
maximum of two thermic actuators may be connected to any one Y... output.
AC 24 V supply
Caution
AC 24 V triac outputs
Example
