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Siemens 

RXC20, RXC21, RXC22 – Room controllers 

CA2N3834en_09 

Building Technologies 

 

2013-06-16 

Connection terminals 

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16

17 18

M

D1

GND

D2

Y1

G

Y2

G

CP

CP

+

CL

A

CL

B

B1

CL

A

CL

B

1

2

3

4

QAX...

T

M

25 26 27 28

Q1

3

Q1

4

AC 230 V

Y3

G

Y4

M

Q2

4

Q3

4

5(4) A

19 19 21

N

L

N

21

L

38

04

A

0

3

LonWorks®

Bus

 

 

Measured value input 

B1 

Measured value input with LG-Ni 1000 sensor 

Measured value input ground 

Signal inputs 

D1 3  Signal 

input 

GND 4 

Signal 

ground 

D2 5  Signal 

input 

Triac outputs 

Y1 

AC 24 V, 0.5 A switching output 

AC 24 V actuator supply 

Y2 

AC 24 V, 0.5 A switching output 

AC 24 V actuator supply 

Y3 

10 

AC 24 V, 0.5 A switching output 

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 

CLB 16  Data 

L

ON

W

ORKS

® bus (plug-in) 

CLA 17  Data 

CLB 18  Data 

Power supply 

N 19 Neutral 

conductor 

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

ON

W

ORKS

® devices. 

1

32

06

Z

01

2 3 4 5 6 7 8

1 L

ON

W

ORKS

®, Data A (CLA) 

2 L

ON

W

ORKS

®, Data B (CLB) 

3 Unoccupied 
4 Unoccupied 

5 Unoccupied 
6 unoccupied 
7 PPS2 

(CP+) 

8 PPS2 

(CP–) 

 

RXC21 

STOP

   Note! 

Tool socket 

Содержание Desigo RXC20.1

Страница 1: ...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 1 thermic valve actuators 3 position AC 24 V valve 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 LONMARK compatible bus communicat...

Страница 2: ...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 Functions The room controller functions are determined by the selected ...

Страница 3: ...verview CA2N3804 Design 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 Plug in Connection terminals 70198 Cable restraints Plug in connection terminals for LONWORKS bus Housing base Service LED...

Страница 4: ...restraints must be used for the wires to termi nals 19 28 AC 230 V The conductors must be secured with cable ties see diagram 3834J01 Ensure that the power is off before inserting or removing plug in terminals connected to a mains voltage The RXC20 RXC21 and RXC22 room controllers communicate with other devices via the following interfaces LONWORKS bus terminals CLA and CLB for communication with ...

Страница 5: ...s 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 RX installation guide document CA110334 contains the relevant engin...

Страница 6: ...tted 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 t...

Страница 7: ...iting or by use of printed adhesive labels see Label under Mechanical design All applications including basic applications 00020 00021 and 00022 allow interroga tion of the inputs and control of the outputs using the RXT10 commissioning and ser vice tool This enables the fan coil manufacturer to test the installed units before deliv ery The LONWORKS bus plug terminals 17 and 18 can be removed and ...

Страница 8: ...eously max 9 5 VA e g 2 thermic valves type STE72 per heating and cooling sequence 1 damper actuator 3 5 VA Relay outputs Q14 Q24 Q34 Quantity 1 RXC20 3 RXC21 RXC22 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...

Страница 9: ...otection 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 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 ...

Страница 10: ...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 LONWORKS 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 ...

Страница 11: ... 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 LONWORKS 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...

Страница 12: ...or supply Room unit CP 13 PPS2 ground CP 14 PPS2 data CLA 15 Data A CLB 16 Data B LONWORKS 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 connect...

Страница 13: ... 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 con...

Страница 14: ...nsformer 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 Y1 N1 L N Y1 G L N Y1 1 1 2 3 4 NS LS COM X1 AC 24 V Y1 1 Y1 2 00105 B Y1 8 7 6 5 COM Y1 COM Y1 N2 1 2 3 4 NS LS COM X1 Y1 5 Y1 6 8 7 6 5 COM Y1 COM Y1 N2 G G0 Y1 3 Y1 4 Y1 7 Y1 8 N1 L N Y1 G AC 230 V L N N1 RXC20 RXC21 RXC22 N2 UA1T see data sheet CA2N3591 Y1 A...

Страница 15: ...s CA2N3834en_09 Building Technologies 2013 06 16 Dimensions all Dimensions in mm 62 1 3 9 35 3 133 2 3834M02 3 3 4 4 62 1 3 9 35 3 167 112 4 107 8 51 5 5 3834M01 86 3 43 2 78 39 70211 3 6 Without terminal covers With terminal covers Drilling diagram ...

Страница 16: ...16 16 Siemens RXC20 RXC21 RXC22 Room controllers CA2N3834en_09 Building Technologies 2013 06 16 2000 2013 Siemens Switzerland Ltd Subject to change ...

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