User Manual

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Siemens RXC39.5 – Room controller CM2N3856en_07
Building Technologies 2015-12-23
• The simultaneous load on outputs Y1, Y2 must not exceed 12 VA
• The maximum load on each output must not exceed 12 VA
Equipment
Y1, Y2
2 thermic valve actuators, type STP73
6 VA each
Simultaneous load:
2 thermic valve actuators *
6 W (12 W) **
6 W (12 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.
The DC 0...10 V control outputs YC...YC4 deliver max. 1.5 mA.
The AC 24 V supply outputs for field devices (G, terminals 5, 27, 29, 33, 37)) may
be charged with a total of max. 12 VA.
Mounting
The room controllers can be mounted in any orientation, and fixed as follows:
80060
80061
Rail mounting
The housing base is designed for snap-
mounting on DIN rails, type EN50022-
35x7.5 (can be released with a screw-
driver)
Surface mounting
There are four drill holes for screw-
mounting (see “Dimensions” for drilling
template). The housing base is fitted with
raised supports.
When mounting note the following:
• The controller should not be freely accessible after mounting
• Ensure adequate air circulation to dissipate heat generated during operation.
• Easy access is required for service personnel
• Local installation regulations must be observed.
Mounting instructions and a drilling template are printed on the controller packaging.
AC 24 V triac outputs
Example
DC 0...10 V outputs
AC 24 V supply for
field devices