Siemens Desigo RXC39.5 User manual

CM2N3856en_06
2013-12-14 Building Technologies
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Desigo™ RXC
Room controller RXC39.5
Communicating room controller
for fan-coil applications
The RXC39.5 room controller is used for temperature control in individual
rooms.
·For fan-coil systems with ECM fan
·PI / PID control (depending on application)
·Downloadable application software
·LONMARK®-compatible bus communications
·For use in the Desigo building automation and control system
·0 … 10 V control of valve actuators, fan, and electric heating coil
·Volt-free relay contacts for release of the fan and the electric heating coil
·Commissioning with RXT10 or standard LONWORKS tool
·AC 24 V operating voltage
·Pluggable screw terminals

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Use
The RXC39.5 room controller is optimized for control of fan-coil systems with ECM
fans in individual rooms.
The controller application is determined by downloadable application software, also
referred to simply as the “application”. The various applications and the associated
functions are described in detail in the applications library: CA110300.
The controller is delivered with basic application 00039. The basic application, which
contains only I/O module functions, is overwritten with the definitive application in the
commissioning phase. The RXT10 commissioning and service tool is used for this
purpose (see “Commissioning”).
In conjunction with a building automation and control system, the RXC39.5
controller can also be used as a universal I/O module, e.g. to register digital signals
or to control various equipment (ON/OFF or modulating). In this case the controller
is loaded with basic application 00039. The inputs can then be read and the
outputs overridden via the building automation and control system.
Functions
The controller functions are determined by the selected application and its parameters.
For a detailed description of functions refer to the Desigo RXC applications library
CA110300.
Ordering
RXZ30.1 Terminal covers
Equipment combinations
The RXC39.5 room controller is compatible with field devices from Siemens
Building Technologies.
For details, refer to the Desigo RX hardware overview, CA2N3804
Use as an I/O module
Product number Stock number Designation
RXC39.5/00039 S55373-C118 Room controller
Accessories

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Technical design
The RXC39.5 controller consists of a housing base, a housing cover and the
printed circuit board with connection terminals. The controller also has a tool
socket, a programming LED and a programming button.
Plug-in Connection terminals
Cover
Plug-in Connection terminals
80048
Cable restraints
Plug-in connection terminals
for bus
Connector for extension
modules
Housing base
Service LED
Service pin
Tool socket
Terminal covers (RXZ30.1) are available as an option, to protect the connection
terminals from physical contact and dirt. The programming LED remains visible
when the terminal covers are in place, and the programming button can be
operated with a pointed implement.
800 49
Removing the terminal cover
Bar code, Code 39
(ID number)
Protection standard
Temperature range
(0 … 50 °C)
Test date, series
(A, B, C…)
Serial No.
Neuron ID
Definitively loaded
application
Location
091112A 33725091112A 33725
Options for use of the labeling fields “Appl.” and “Loc.”:
-Hand-written entry of the location and the actual application … or
-Printed adhesive label (printed from the RXT10 commissioning and service tool)
Terminal cover
Label
Note

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All connection terminals are detachable plug-in terminals. They are arranged so
that, under normal circumstances, all incoming and outgoing cables can be
connected without crossing.
Cable strain relief The conductors to the connection terminals can be
secured with cable ties to the housing base.
3873J 04
The RXC39.5 controller communicates with other devices via the following interfaces:
·LONWORKS bus (terminals CLA and CLB) for communication with:
-the PXR system controller or the NIDES.RX interface (to Desigo)
-other Desigo RXC devices
-LONMARK-compatible third party devices (e.g. presence detector)
·PPS2 (terminals CP– and CP+):
-Interface to the QAX… room units. (In addition to PPS2, the LONWORKS® bus
is also looped to the tool socket on the room unit.)
·Tool socket (RJ45) on the controller or room unit, for:
-RXT10 commissioning and service tool (LONWORKS® bus)
-RXT20.1 service terminal (PPS2)
The diagram below shows the wiring of the LONWORKS® bus and PPS2 interface when
a QAX… room unit is connected. It also shows the options for connecting the RXT10
commissioning and service tool and the RXT20.1 service terminal.
Connection terminals
Communication
LONWORKS® bus

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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 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 LONWORKS® 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

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·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 STP72E 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

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Commissioning
The RXC39.5 controller is commissioned with the RXT10 commissioning and service
tool. This is connected to the LONWORKS bus via a tool socket (on the controller or room
unit).
The commissioning procedure for the entire Desigo RXC range is described in
detail in the RXT10 user manual, document CM110669.
The labeling fields “Appl.” and “Loc.” on the controller are used to indicate the
application actually loaded and the location of the controller, either in writing or by
use of printed adhesive labels (see “Label” under “Mechanical design”).
All applications (including basic application 00039) allow direct interrogation of the
inputs and control of the outputs using the RXT10 commissioning and service tool.
This makes it possible to test the installation and to operate connected plant
provisionally before the complete Desigo RXC system is commissioned.
·The LONWORKS bus plug (terminals 23 and 24) can be removed and
reconnected at any time, even while the controller is in operation. Only the
original bus plug may be used.
·Overloading the triac outputs Y1, Y2 may cause the thermal fuse to trip and
disable the controller. When the problem has been solved briefly disconnect and
reconnect the power supply. The controller will resume normal operation after a
delay of approximately 10 minutes.
Outputs Y1, Y2 are not protected against accidental connection to AC 24 V.
This can damage the triacs.
Technical data
Power supply Operating voltage SELV / PELV AC 24 V ± 20 %
Rated voltage AC 24 V
Frequency 50/60 Hz
Power consumption
without field devices
with connected field devices
6 VA
Max. 33 VA
Permissible transit power AC 24 V
for supply of field devices
Max. 12 VA
Internal fuse Thermal, automatic reset
Caution
Supply cable protection (external fuse) Transformer with secondary limitation of
max. 10 A or
External secondary power fuse with
max. T 10 A non-renewable fuse or
max. C 13 A circuit breaker
is required in all cases
Labeling
Function test
Notes
STOP Note!

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Inputs (SELV)
Signal inputs D1 … D4 Contact voltage DC 16 V
(for volt-free contacts) Contact current DC 5 mA
Contact transfer resistance Max. 100 W
Contact insulation resistance Min. 50 kW
Switch time: min. 20ms ON, min. 20ms OFF
Universal input X1 Compatible temperature sensors LG-Ni 1000
Measuring range 0…50 °C
Sensor current 2.3 mA
Resolution £0.2 K
Measuring error (without cable) ±0.2 K at 25° C
or
Measuring input for DC 0 ... 10 V signals
Measuring range (nominal)
Over range
Under range
Resolution
Sample rate
DC 0...10 V
3.0 V
0 V
20 mV
£1 s
Measured value input B2 Compatible temperature sensors LG-Ni 1000
Measuring range 0…50 °C
Sensor current 2.3 mA
Resolution £0.2 K
Measuring error (without cable) ±0.2 K at 25° C
Outputs (SELV)
Field supply (G, G0)
Caution
Output voltage
Fuse
AC 24 V (transit power)
No internal fusing
Fusing on the supply line required under
all circumstances
Triac (Y1, Y2) Output voltage AC 24 V
Permissible load current Max. 0.5 A
Power limitation Fuse T 2 A, can not be changed
(common for both triacs)
Total nominal load
(load on both outputs simultaneously)
Max. 12 VA
DC 0 … 10 V Resolution 3 mV
(YC1...YC4) Accuracy 100 mV
Output current Max. 1.5 mA
Supply output G (SELV) Voltage / Max. load AC 24 V / Max. 6 VA
Relays (Q12, Q22) Relay type Monostable
Contact rating with AC voltage
Max. switching power (resistive) Max. AC 250 V, 10 A
Interface to room unit Number of room units connectable 1
Interface type for room unit
for ACS
PPS2
Bus
PPS2 baud rate 4.8 kbit/s
Baud rate on the LONWORKS bus 78 kbit/s
LONWORKS Bus Interface type LONMARK-compatible, electrically
isolated
Physical layer FT 5000
Baud rate bus 78 kbit/s
Bus topology and bus termination See Installation guide, CA110334

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Cable connections Plug-in terminal blocks
Solid conductors
Stranded conductors without
connector sleeves
Stranded conductors with connector
sleeves (DIN 46228/1)
Rising cage terminals
1 x 0.2 ... 2.5mm2
or 2 x 0.2 ... 1.0 mm2
1 x 0.2 ... 2.5mm2
or 2 x 0.2 ... 1.5 mm2
1 x 0.25 ... 2.5mm2
or 2 x 0.25 ... 1.0 mm2
Max. tightening torque 0.6 Nm
Single cable lengths for field devices See also the RXC installation guide,
CA110334
Signal inputs D1…D4 Max. 100 m with diameters ³0.6 mm
Measured value input X1, B2 Max. 100 m with diameters ³0.6 mm
Triac outputs Y1...Y6 Max. 100 m where A ³1.5 mm2
DC 0…10 V outputs YC1...YC4 Max. 100 m where A ³1.5 mm2
Relay outputs Q12, Q221 Depends on load and local regulations
Interface to room unit Max. 115 m where A= 0.75 mm
2
(including connecting cable for tool)
Cable type 4-core, twisted pair, unscreened
LONWORKS Bus See Installation guide, CA110334
Cable type See Installation guide, CA110334
Tool connecting cable See Installation guide, CA110334
Housing
protection standard
Protection standard to EN 60529 IP30 with terminal cover fitted and
wall mounted without DIN rail
IP20 for all other mounting
arrangements
Protection class Insulation protection class III
Ambient conditions Normal operation Class 3K5 to IEC 60721-3-3
Temperature 0 … 50 °C
Humidity < 85 % r.h.
Transport Class 2K3 to IEC 60721-3-2
Temperature – 25 … 65 °C
Humidity < 95 % r.h.
Standards and directives - Product standards EN 60730
marking
- EMC
Immunity (industrial & residential)
Emission (residential)
2004/108/EC
EN 60730-1
EN 60730-1
- Low Voltage Directive
Electrical safety
2006/95/EC
EN 60730-1
- RoHS
Techn. RoHS proof
2011/65/EU
EN 50581
C-Tick conformity (EMC) AS/NZS 61000-6-3
Meets the requirements for eu.bac certification
See product list at: http://www.eubaccert.org/licences-by-criteria.asp
Type License Application Control accuracy [K]
RXC39.5 213296 Fan-Coil 2 pipes heating / coooling 0.2 / 0.1
Fan-Coil 2 pipes 2 wires heating / coooling 0.2 / 0.3
Fan-Coil 4 pipes heating / coooling 0.2 / 0.1
Environmental compatibility The product environmental declaration
CA2E3840 contains data on RoHS
compliance, materials composition,
packaging, environmental benefit, disposal
ISO 14001 (Environment)
ISO 9001 (Quality)
Dimensions See dimension diagrams
Weight excluding packaging 0.270 kg
including packaging 0.300 kg

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Connection terminals
3856A02
1234 5 6 7 8 9 10 11 12 13 14 15
G0 G G
CLA CLB
LONWORKS®
Technology
12 34
QAX...
26 27 28
G Y2 Y1
29 353433323130
G
16 17 18 19 20 21
AQ
T
AC 24 V
G0
T
G X1 M B2 M D1 GND
D2
D3 GND
D4
CP– CP+ CLA CLB
Bus
22 23 24 25
Q11 Q12 Q21 Q22
3736
YC1
G0
G
YC2 YC3
G0
G
YC4
0...10 V OUT 0...10 V OUT
0...10 V OUT 0...10 V OUT
AC 24 V supply
G0 1,2 Controller ground
G3,4 AC 24 V supply
Measured value input
G5 AC 24 V supply for sensors, actuators
X1 6 Universal input (LG-Ni 1000, or DC 0…10 V for air quality sensor)
M7 Measured value input ground
B2 8 Measured value input for LG-Ni 1000 sensors
M9 Measured value input ground
Signal inputs for volt-free contacts
D1 10 Signal input
GND 11 Signal ground
D2 12 Signal input
D3 13 Signal input
GND 14 Signal ground
D4 15 Signal input
Room unit
CP– 16 PPS2 ground
CP+ 17 PPS2 data
CLA 18 LONWORKS Data A
CLB 19 LONWORKS Data B
LONWORKS Bus
CLA 20 LONWORKS Data A
CLB 21 LONWORKS Data B
Relay outputs
Q11 22 Feed for Q12
Q12 23 Normally-open contact, max. AC 250 V, 1.8 KW
Q21 24 Feed for Q22
Q22 25 Normally-open contact, max. AC 250 V, 1.8 KW
Triac outputs
Y1 26 AC 24 V, 0.5 A switching output
G27 AC 24 V actuator supply
Y2 28 AC 24 V, 0.5 A switching output
G29 AC 24 V actuator supply
0 … 10 V outputs
YC1 30 DC 0 … 10 V control output for actuator
G0 31 Controller ground
YC2 32 DC 0 … 10 V control output for actuator
G33 AC 24 V supply for sensors, actuators
YC3 34 DC 0 … 10 V control output for actuator
G0 35 Controller ground
YC4 36 DC 0 … 10 V control output for actuator
G37 AC 24 V supply for sensors, actuators