Siemens Desigo RXC39.5 User manual

CM2N3856en_06

2013-12-14 Building Technologies

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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Siemens RXC39.5 – Room controller CM2N3856en_06

Building Technologies 2013-12-14

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

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

(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

- 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

CLA

CLB

LONWORKS®

Technology

12 34

QAX...

26 27 28

29 353433323130

16 17 18 19 20 21

AC 24 V

GND

CP–

CP+

CLA

CLB

Bus

22 23 24 25

Q11

Q12

Q21

Q22

3736

YC1

YC2

YC3

YC4

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

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