Siemens Desigo RXC20.1, Desigo RXC21.1, Desigo RXC20.5, Desigo RXC21.5, Desigo RXC22.5 User Manual

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834

Desigo™ RXC

Room controllers

RXC20.1 / RXC20.5 RXC21.1 / RXC21.5 RXC22.1 / RXC22.5

For fan-coil systems, chilled ceilings and radiators

with L

ONMARK® compatible bus communications

The RXC20, RXC21 and RXC22 room controllers are used for temperature control in individual rooms.

 For 2-pipe or 4-pipe fan-coil systems, with or without change-over  For chilled ceilings and radiators  Control of AC 24 V PDM

and damper actuators, or electric heating coils

 Volt-free relay contacts for fan control and electric heating coils  PI or PID control (depending on application)  Downloadable application software  L

ONMARK® compatible bus communications

 For use in the Desigo building automation and control system  AC 230 V operating voltage

1) PDM = pulse/duration modulated

thermic valve actuators, 3-position AC 24 V valve

CA2N3834en_09 2013-06-16

Building Technologies

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Use

The RXC20, RXC21 and RXC22 room controllers are optimized for control of fan-coil systems, chilled ceilings and radiators in individual rooms. The following versions are available for fan-coil systems:

 RXC20: 1-speed automatic fan control  RXC21: 1- to 3-speed automatic fan control  RXC22: 1- to 3-speed automatic fan control

with integrated relay for electric re-heating

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 RXC applications library. (V1: CA2A3810, V2: CA110300).

The room controllers are delivered with the basic application 00020 (RXC20),00021 (RXC21) and 00022 (RXC22), respectively. 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”).

Use as an I/O module

Functions

Types

In conjunction with a building automation system, the RXC20, RXC21 and RXC22 room controllers can also be used as universal I/O modules, e.g. to register binary signals or to control various equipment (ON/OFF or pulse control with AC 24 V or volt-free relay contacts). In this case, the room controllers are loaded with basic application 00020, 00021 and 00022, respectively. The inputs can then be read and the outputs overridden via the building automation system.

The room controller functions are determined by the selected application and its parameters and by the input/output configuration. For a detailed description of functions, refer to the Desigo RXC applications library (V1: CA2A3810, V2:CA110300).

When Desigo RXC is integrated into a building automation system additional functions become available such as time scheduling, central control of setpoints, etc. (refer to the Desigo INSIGHT documentation for further information).

The RXC20, RXC21 and RXC22 room controllers differ only in the number of outputs they provide:

Type SSN AC 24 V triac outputs Relay outputs

RXC20.1 RXC20.5

RXC21.1 RXC21.5

RXC22.1 RXC22.5

S55373-C111

S55373-C112

S55373-C113

For two thermic valve actuators or one 3-position actuator

For four thermic valve actuators or two 3-position actuators

For two thermic valve actuators or one 3-position actuator

For 1-speed fan control

For 3-speed fan control

For 3-speed fan control Internal relay for electric heating coil

RXZ20.1

Accessories: Terminal covers

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Ordering

Compatibility

Design

When ordering please specify the quantity, product name, type code and application. The controllers are delivered with the basic application 00020, 00021 or 00022, respectively.

The RXZ20.1 terminal covers are supplied in packs of 1 pair and must be ordered separately.

Example:

30 RXC20.5 room controllers RXC20.5/00020 30 Pairs of terminal covers RXZ20.1

The QAX… room units and the Siemens field devices can be used with the RXC20, RXC21 and RXC22 room controllers. For details, refer to the RX hardware overview, CA2N3804.

The RXC20, RXC21 and RXC22 room controllers consist of a housing base, a housing cover and the printed circuit board with connection terminals. The controller also has a tool socket, a service LED and a service pin.

Plug-in Connection terminals

Housing cover

70198

Cable restraints

Plug-in connection terminals for L

ONWORKS® bus

Housing base

Service LED

Plug-in Connection terminals

Service pin

Tool socket

Terminal cover

Terminal covers (RXZ20.1) are available as an option, to protect the connection terminals from physical contact and dirt. The service LED remains visible when the terminal covers are in place, and the service pin can be operated with a pointed implement. The cable is connected to the room controller by breaking out the perforated cable entry guide.

70200

Removing the terminal cover

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Label (example RXC22.5)

Note

Connection terminals

STOP

Note!

Neuron ID

Bar code, Code 39

(ID number)

Protection standard

Temperature range

(0 … 50 °C)

Serial No.

Test date, series

(Z, A, B, C…)

Observe notes

in this document

Factory-loaded

application

Definitive

application

Location

Options for use of the labeling fields “Appl.” and “Loc.”:

 Hand-written entry of the location and the loaded application ... or  Printed adhesive label (printed from the RXT10 commissioning and service tool)

All connection terminals are detachable plug-in terminals. To avoid incorrect wiring, terminals which can be connected to AC 230 V (supply and relay outputs) are physically separate from the other terminals.

Cable restraints must be used for the wires to termi-

3834J01

nals 19 … 28 (AC 230 V). The conductors must be secured with cable ties (see diagram).

Warning!

Ensure that the power is off before inserting or removing plug-in terminals connected to a mains voltage.

Communication

The RXC20, RXC21 and RXC22 room controllers communicate with other devices via the following interfaces:  L

ONWORKS® bus (terminals CLA and CLB) for communication with:

 PXX-Lxx, PXR system controller or NIDES.RX interface (to Desigo)  Other Desigo RXC devices  L

ONMARK® compatible 3

party devices (e.g. presence detector)

 PPS2 (terminals CP– and CP+):

 Interface to the QAX… room units. (In addition to PPS2, the L

ONWORKS® bus is

also looped to the tool socket on the room unit.)

 Tool socket (RJ45) on the room controller or room unit, for:

 RXT10 commissioning and service tool (L

ONWORKS® bus)

 RXT20.1 service terminal (PPS2)

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ONWORKS® bus

and 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.

Service LED

Service pin

Disposal

Engineering notes

The yellow service LED shows the current operational status of the room controller by means of different flashing patterns (see the RXT10 user manual, CM110669).

The service pin is used to identify the room controller in the commissioning phase. When the pin is pressed the room controller’s identification number is transmitted to the RXT10 commissioning and service tool.

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.

The Desigo RX installation guide, document CA110334, contains the relevant engineering information for the L

ONWORKS® bus (topology, bus repeaters, bus termination, etc.)

and for the selection and dimensions of connecting cables for the supply voltage and field devices.

The room controllers have an AC 230 V mains supply voltage. The controlled devices (valves and damper actuators) are supplied directly from the room controller. This means that a separate AC 24 V supply is not necessary for the RXC20, RXC21 and RXC22 room controllers and the associated field devices.

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AC 230 V supply cables

AC 230 V volt-free relay outputs

STOP

Note!

AC 24 V triac outputs

 The dimensions and fuse protection for the supply cables depend on the total load

and on local regulations. The cables must be secured with cable restraints.

 If serial wiring is applied on the terminal block 19/21, the connection will be inter-

rupted if the block is removed from the controller (the jumpers 19-19 and 21-21 are on the PCB, not in the block, see terminal diagrams on pages 10 … 12).

The volt-free relay outputs allow switching of loads up to AC 250 V, 5 A (4 A). The heating coil relay in the RXC22 switches resistive loads up to 1.8 kW. The cable dimensions depend on the connected load and the local installation regulations. The circuits must be externally fused ( 10 A) as there are no internal fuses. The cables must be secured with cable restraints.

Parallel operation of the fans is not

permitted.

The simultaneous load on outputs Y1 … Y4 must not exceed 9.5 VA.

Example: Y1 (heating) 2 thermic valve actuators, type STP72E 6 W Y2 (cooling) 2 thermic valve actuators, type STP72E 6 W Y3, Y4 (outside air) 3-position damper actuator 3.5 VA 3.5 VA

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.

Mounting instructions

The room controllers can be mounted in any orientation using the following fixing options:

70202

Rail mounting The housing base is designed for snapmounting on DIN rails, type EN50022-35 x

7.5 (can be released with a screwdriver).

When using small loads (< 2VA), the voltage tolerance may be > + 20% (see technical data, Triac outputs below)

70203

Surface mounting There are two drill holes for screw-mounting (see “Dimensions” for drilling template). The housing base is fitted with raised supports. Screws: Max. diameter 3.5 mm, min. length 38 mm

STOP

Note!

Tightening torque for fixing screws max. 1.5 Nm

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Commissioning notes

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.

The mounting instructions and a drilling template are printed on the controller packaging.

The RXC20, RXC21 and RXC22 room controllers are commissioned with the RXT10 commissioning and service tool. The RXT10 is plugged into the tool socket on the room controller or room unit for connection to the L

ONWORKS® bus.

The commissioning procedure for the entire Desigo RXC range is described in detail in the RXT10 user manual, document CM110669.

Labeling

Function test

Note

STOP

Note!

The labeling fields “Appl.” and “Loc.” 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 applications 00020, 00021 and 00022) allow interrogation of the inputs and control of the outputs using the RXT10 commissioning and service tool. This enables the fan-coil manufacturer to test the installed units before delivery.

The L

ONWORKS® bus plug (terminals 17 and 18) can be removed and reconnected at

any time, even while the controller is in operation. Only the original bus plug may be used.

 In the event of a long-term short circuit (approx. 4 minutes) or overload,

the thermal fuse in the transformer may trip. Subsequently, the device must be exchanged.

 There is no protection against accidental connection on the AC 24 V side.  Mains AC 230 V for the supply and for the relays must be disconnected before

plugging and unplugging the terminal blocks (danger of electric shock!)

 If serial wiring is applied on the terminal block 19/21, the connection will be

interrupted if the block is removed from the controller (the jumpers 19-19 and 21-21 are on the PCB, not in the block, see terminal diagrams on pages 10 … 12).

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Technical data

Power supply

Operating voltage Rated voltage

Frequency 50/60 Hz Power consumption with

output field devices connected

Internal fuse Thermal, non-resetting

Operating data Control algorithm PI or PID

Inputs

Signal inputs D1, D2 Quantity 2 (for volt-free contacts) Contact voltage DC 16 V

Contact current DC 8 mA Contact transfer resistance max. 100  Contact insulation resistance min. 50 k Not suitable for pulse control Measured value input B1 Compatible temperature sensors LG-Ni 1000 Quantity 1 Measuring range 0 ... 50 °C Sensor current 2.3 mA Resolution 0.2 K Measuring error at 25 °C sensor temp. (exclud-

ing cable)

Outputs

C 24 V triac outputs, Y1 ... Y4 Quantity 2 (RXC20, RXC22)

Output voltage

Output current max. 0.5 A Total nominal load

(at both outputs simultaneously)

Relay outputs Q14, Q24, Q34

Quantity 1 (RXC20)

Relay type single pole Contact rating with AC voltage Switching voltage max. AC 250 V, min. AC 19 V Nominal current, resistive/inductive max. AC 5 A/4 A (cos  = 0.6) Making current 200 ms half-time max. 20 A Switching current at AC 29 V min. AC 10 mA Contact rating with DC voltage Switching voltage max. DC 250 V, min. DC 5 V Switching current at DC 5 V min. DC 100 mA Switching capacity max. 20 W Inductive load L/R max. 7 ms

Q44 Relay type single pole

Contact rating with AC voltage Max. admissible load (purely resistive) max. 1.8 kW External fuse (essential) max. 10 A

STOP

..Note!

Q44 is only permitted for mains voltage, not for security extra low voltage

Interfaces Interface to room unit Number of room units connectable max. 1 Interface type for room unit

for RXT10

PPS2 baud rate 4.8 kbps L

ONWORKS® bus Interface type LONMARK® compatible,

ONWORKS® baud rate 78 kbps

Transceiver on RXC2X.1: FTT-10A, on RXC2X.5: FT 5000 Baud rate 78 kbps Bus topology, bus termination see installation guide, CA110334

C 230 V ± 10 % C 230 V

max. 12 VA

max. 0.2 K

4 (RXC21)

C 24 V ON/OFF, PDM or 3-position: +/–20%

(May exceed +20% with loads under 2VA)

max. 9.5 VA (e.g. 2 thermic valves, type STE72 per heating and cooling sequence + 1 damper actuator 3.5 VA)

3 (RXC21, RXC22)

PPS2 L

ONWORKS® bus

electrically isolated

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Cable connections Plug-in terminal blocks

Solid conductors

Stranded conductors without connector sleeves

Stranded conductors with connector sleeves

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

(DIN 46228/1)

Max. tightening torque 0.6 Nm Single cable lengths see also installation guide, CA110334 Signal inputs D1, D2 max. 100 m with diameters  0.6 mm Measured value input B1 max. 100 m AC 24 V triac outputs, Y1 ... Y4 max. 100m where A  1.5 mm Relay outputs Q14, Q24, Q34, Q44 depends on load and local regulations Interface to room unit max. 115 m where A= 0.75 mm

(including tool connecting cable)

Cable type 4-core, twisted pair, unscreened L

ONWORKS® bus max. 500 m

Cable type see installation guide, CA110334 Tool connecting cable max. 3 m

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 Suitable for use in systems with protection class I or II

Ambient conditions Operation class 3K5 as per IEC 60721-3-3 Temperature 0 ... 50 °C Humidity < 85 % r.h. Transport class 2K3 as per IEC 60721-3-2 Temperature – 25 ... 65 °C Humidity < 95 % r.h.

Standards and directives

- Product standards

marking

- EMC

Immunity (industrial & residential)

Emission (residential)

- Low Voltage Directive

Electrical safety

- RoHS

Techn. RoHS proof

EN 60730

2004/108/EC

EN 60730-1

2006/95/EC

EN 60730-1

2011/65/EU

EN 50581

Electronic individual zone control equipment EN 15500 UL compliance UL916

C-Tick conformity (EMC)

S/NZS 61000-6-3

eu.bac Meets the requirements for eu.bac certification

See product list at: http://www.eubaccert.org/ licences-by-criteria.asp Type License

pplication Control

accuracy [K] RXC20.5 20737 Fancoil 2 pipes heating / coooling 0.2 / 0.1 Heating systems (radiator) 0.3 Electric convectors 0.2 Chilled ceiling systems 0.3 RXC21.5 20705 Fancoil 2 pipes heating / coooling 0.2 / 0.1 Fancoil 2 pipes / 2 wires heating / coooling 0.2 / 0.1

Fancoil 4 pipes heating / coooling 0.2 / 0.1 Chilled ceiling systems 0.3

Environmental compatibility The product environmental declaration

CA2E3834 contains data on RoHS compliance,

ISO 14001 (Environment) ISO 9001 (Quality)

materials composition, packaging, environmental

Dimensions See dimension diagrams

benefit, disposal

Weight Excluding packaging 0.59 kg

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Connection terminals

RXC20

123456789 13141516 1718

MD1GNDD2Y1GY2

CP–

CP+

CLA

1234

QAX...

CLB

CLA

CLB

LonWorks®

Bus

STOP

Note!

Tool socket

AC 230 V

19 19 21 25 26

5(4) A

Q13

Q14

3804A02

Measured value input

B1 1 Measured value input with LG-Ni 1000 sensor M 2 Measured value input ground

Signal inputs

D1 3 Signal input GND 4 Signal ground D2 5 Signal input

Triac outputs

Y1 6 AC 24 V, 0.5 A switching output G 7 AC 24 V actuator supply Y2 8 AC 24 V, 0.5 A switching output G 9 AC 24 V actuator supply

Room unit

CP– 13 PPS2 ground CP+ 14 PPS2 data CLA 15 Data A CLB 16 Data B

ONWORKS® bus (plug-in)

CLA 17 Data A CLB 18 Data B

Power supply

N 19 Neutral conductor L 21 Phase line AC 230 V +/- 10 %

Relay output

Q13 25 Feed for Q14 Q14 26 N/O contact AC max. 250 V, 5 (4) A

 Observe the technical data for the relay output: Max. AC 250 V, 5 (4) A  Local installation regulations must be observed.

Standard RJ45 tool socket for L

2345678

3206Z01

ONWORKS® devices.

1 LONWORKS®, Data A (CLA) 2 L

ONWORKS®, Data B (CLB)

3 Unoccupied 4 Unoccupied

5 Unoccupied 6 unoccupied 7 PPS2 (CP+) 8 PPS2 (CP–)

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Connection terminals

RXC21

STOP

Note!

Tool socket

12345678910111213141516 1718

CLA

MD1GNDD2Y1GY2

AC 230 V

NLN

19 19 21

Y3GY4

Q13

25 26 27 28

5(4) A

Q14

CP–

1234

QAX...

Q24

Q34

CP+

CLA

CLB

LonWorks®

Bus

3804A03

Measured value input

B1 1 Measured value input with LG-Ni 1000 sensor M 2 Measured value input ground

Signal inputs

D1 3 Signal input GND 4 Signal ground D2 5 Signal input

Triac outputs

Y1 6 AC 24 V, 0.5 A switching output G 7 AC 24 V actuator supply Y2 8 AC 24 V, 0.5 A switching output G 9 AC 24 V actuator supply Y3 10 AC 24 V, 0.5 A switching output G 11 AC 24 V actuator supply Y4 12 AC 24 V, 0.5 A switching output

Room unit

CP– 13 PPS2 ground CP+ 14 PPS2 data CLA 15 Data A CLB 16 Data B

ONWORKS® bus (plug-in)

CLA 17 Data A CLB 18 Data B

Power supply

N 19 Neutral conductor L 21 Phase line AC 230 V +/- 10 %

Relay outputs

Q13 25 Feed for Q14, Q24 and Q34 Q14 26 N/O contact AC max. 250 V, 5 (4) A (stage 1) Q24 27 N/O contact AC max. 250 V, 5 (4) A (stage 2) Q34 28 N/O contact AC max. 250 V, 5 (4) A (stage 3)

 Observe the technical data for the relay outputs: Max. AC 250 V, 5 (4) A  Local installation regulations must be observed.

Standard RJ45 tool socket for L

2345678

3206Z01

ONWORKS® devices.

1 LONWORKS®, Data A (CLA) 2 L

ONWORKS®, Data B (CLB)

3 Unoccupied 4 Unoccupied

5 Unoccupied 6 unoccupied 7 PPS2 (CP+) 8 PPS2 (CP–)

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Connection terminals

RXC22

STOP

Note!

Tool socket

123456789 13141516 1718

MD1GNDD2Y1GY2

AC 230 V

NLN

19 19 21

22 23

10 A

N.C.

Q44

Q43

Q13

25 26 27 28

5(4) A

Q14

CP–

1234

QAX...

Q24

Q34

CP+

CLA

CLB

CLA

LonWorks®

Bus

Measured value input

B1 1 Measured value input with LG-Ni 1000 sensor M 2 Measured value input ground

Signal inputs

D1 3 Signal input GND 4 Signal ground D2 5 Signal input

Triac outputs

Y1 6 AC 24 V, 0.5 A switching output G 7 AC 24 V actuator supply Y2 8 AC 24 V, 0.5 A switching output G 9 AC 24 V actuator supply

Room unit

CP– 13 PPS2 ground CP+ 14 PPS2 data CLA 15 Data A CLB 16 Data B

ONWORKS® bus (plug-in)

CLA 17 Data A CLB 18 Data B

Power supply

N 19 Neutral conductor L 21 Phase line AC 230 V +/- 10 %

Relay outputs

Q13 25 Common feed for Q14, Q24 and Q34 Q14 26 N/O contact AC max. 250 V, 5 (4) A (stage 1) Q24 27 N/O contact AC max. 250 V, 5 (4) A (stage 2) Q34 28 N/O contact AC max. 250 V, 5 (4) A (stage 3) 22 Not connected! Q43 23 Feed for Q44 Q44 24 N/O contact AC max. 250 V, 10 A (electric heating coil)

 Observe the technical data for the relay outputs:

Max. AC 250 V, 5 (4) A and 10 A, respectively

 Local installation regulations must be observed.

Standard RJ45 tool socket for L

ONWORKS® devices.

2345678

1 LONWORKS®, Data A (CLA) 2 L

ONWORKS®, Data B (CLB)

3 Unoccupied 4 Unoccupied

3206Z01

CLB

3804A04

5 Unoccupied 6 unoccupied 7 PPS2 (CP+) 8 PPS2 (CP–)

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Connection diagrams

Connection of field devices, room unit, L

ONWORKS® bus and

power supply

GND

CP–

CP+

CLA

CLB

CLA

CLB

Q43

Q44

PPS2

LonWorks® Bus

AC 230 V

Y1.1

Y3.1

Y1.2

Y2.2

Y3.2

Y4.2

STOP

Note

Note!

Q1.1

3834A05

Q13

Q14

Q24

Q34

N1 RXC20, RXC21, RXC22 B1 Temperature sensor LG-Ni 1000 D1, D2 Volt-free contacts (window contact, occupancy sensor, etc.) Y1...Y4 AC 24 V thermic valve actuators Y1.1 AC 24 V, 3-position valve or damper actuator Y1.2, Y2.2, AC 24 V contactors for electric heating coil Y3.1 AC 24 V, 3-position valve or damper actuator Y3.2, Y4.2 AC 24 V contactors for electric heating coil B2 QAX… room unit Q1 3-speed fan Q1.1 1-speed fan Q2 Electric heating coil

Twisted pair

 Parallel operation of fans at relay outputs Q14 … Q34 is not permitted. For

parallel operation use cut-off relays or slave room controllers.

 At Q2 (1.8 kW max. ohmic load), use additional external fuses of max. 10 A to

protect the conductor tracks.

For information on the compatibility of the various field devices with the RXC20, RXC21 and RXC22 room controller, refer to the various application descriptions. See Applications library, document V1: CA2A3810, V2: CA110300).

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Parallel connection of several thermic actuators

STOP

Note!

Connection to controller

Up to 2 thermic actuators can be connected directly to the room controller. In the case of more than 2 actuators a power amplifier is required.

The same principle applies to outputs Y2 … Y4.

Note that the simultaneous load on outputs Y1 … Y4 must not exceed 9.5 VA.

Power consumption at input X1 of the UA1T: 0.5 VA.

Mixed operation: Connecting thermic actuators to the controller as well as to the power amplifier is NOT allowed. Differing voltage of the internal transformer of the controller and the supply of the power amplifier may cause big differences in the position of the valves.

AC 230 V

00105 A

Connection to power amplifier

Y1.1

AC 24 V

GG0

COM

Y1.1

Y1.2

Y1.5

Y1.6

AC 230 V

00105 B

Y1.3

Y1.4

Y1.7

Y1.8

N1 RXC20, RXC21, RXC22 N2 UA1T (see data sheet CA2N3591) Y1 AC 24 V thermic valve actuator Y1.1 AC 24 V thermic valve actuator (max. 2 STP72E / STP72E actuators per Y1 output on the UA1T)

Notes

 The UA1T requires an AC 24 V supply voltage  The UA1T is not suitable for the connection of 3-position actuators.

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Dimensions (all Dimensions in mm)

Without terminal covers

4,4

With terminal covers

35,3

3,9

133,2

3,3

3834M02

51,5

35,3

167

Drilling diagram

62 1

3,9

3,6

112,4 107,8

70211

3834M01

43,2

86,3

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 2000 - 2013 Siemens Switzerland Ltd. Subject to change