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Siemens 

RXM21.1 - PL-Link IO Block 

CM2N3835en_01 

Building Technologies 

 

07 Mar 2012 

Dimensions 

 
 

Without terminal covers 

62

1

3,9

35

,3

133

,2

38

73

M

14

3,

3

4,

4

 

 
 

With terminal covers  
RXZ20.1  

(to be ordered separately) 

62

1

3,9

35,

3

16

7

112,4
107,8

51,5

5

38

73

M

15

 

 
 

 
 
 
 
 

All dimensions in mm 

Summary of Contents for RXM21.1

Page 1: ... actuators AC 24 V 2 or 3 point Temperature input LG Ni 1000 2 digital inputs Operating voltage AC 230 V Pluggable screw terminals Use The RXM21 1 PL Link I O Block allows control of a single fancoil unit by a PXC3 room automation station via the PL Link peripheral bus It is optimized for fancoil installation and control in terms of housing connection terminals and I O mix The PL Link PeripheraL L...

Page 2: ...1 1 consists of a terminal base upper section of housing and circuit board with plug in connection terminals on the side In addition the device offers a tool socket a service LED and button Plug in connection terminals Upper housing section Plug in connection terminals 3835Z01 Lugs for cable strain relief Plug in connection terminal for PL Link bus Housing base Service LED Service button Tool sock...

Page 3: ...ss Failure Status Programming mode Connection test Reset Result Factory settings Indication time 60 s can be ended by briefly pressing the button Warning Only trained electrical installation staff may press the service button when the terminal cover is removed Adjacent terminal may be powered The device is supplied without terminal covers protecting the connection terminals against touch and soili...

Page 4: ... right Plug in terminals connected to power must be removed from power prior to plug in or plug out 3873J04 The PL Link I O Block RXM21 1 contains the following interfaces PL Link terminals RJ45 tool plug for FW upgrade proprietary a Siemens connection cable is required Warning Only trained electrical installation staff may connect the tool plug RJ45 Adjacent terminal may be powered Do not connect...

Page 5: ...using of the power lines are oriented to overall connected load and local regulations The switching circuits must be externally fused 10 A no internal fusing The cables must be attached to the device with strain relief STOP Caution Do not connect fans in parallel Outputs Y1 Y4 may not exceed 9 VA simultaneous load Y1 Y2 heating 3 position valve actuator 4 5 VA Y3 Y4 cooling 3 position valve actuat...

Page 6: ... installation regulations The mounting instructions including drilling template is printed on the device packing Commissioning notes Outputs are inactive relay off triac off when an application does not use an output The outputs can be controlled and the inputs queried as part of a special test mode SSA tool 3 position actuators No synchronization is executed when the sense of rotation is changed ...

Page 7: ...ontact current DC 5 mA Contact transfer resistance Max 100 Ohm Contact insulation resistance Min 50 kOhm Switching time Min 20 ms ON min 20 ms OFF Heartbeat 1 s Protection against faulty wiring on AC 24 V Protected Measured value input B1 Connectable temperature sensor LG Ni 1000 Quantity 1 Measuring range 0 50 C Sensor current 0 5 mA Resolution 0 1 K Measuring error at 25 C sensor temp without li...

Page 8: ...eiver TP UART Bus power 5 mA Baud rate 9 6 kbps Protection against faulty wiring AC 24 V Proteced Bus topology See installation guide TRA CM111043 Line connections Connection terminals for signals and power supply plug in screw terminals Solid or stranded 0 25 2 5 mm2 or 2 x 1 5 mm2 Connection terminals for PL Link bus plug in screw terminals Solid or stranded wire 2 x max 1 0 mm2 e g YCYM 2x2x0 8...

Page 9: ...c compatibility as per directive 2004 108 EC Low voltage directive 2006 95 EC UL approbation UL916 C tick conformity EMC AS NZS 61000 6 3 Environmental compatibility The product environmental declaration CA2E3871 contains data on environ mentally compatible product design and assessments RoHS compliance materials composition packaging environmental benefit disposal ISO 14001 environment ISO 9001 q...

Page 10: ...C 24 V Y2 9 Switching output AC 24 V 0 5 A Y3 10 Switching output AC 24 V 0 5 A G 11 Actuator supply AC 24 V Y4 12 Switching output AC 24 V 0 5 A PL Link 17 Data line 18 Data line Power N 19 Neutral conductor L 21 Phase conductor AC 230 V 10 Relay outputs Q13 25 Common supply for Q14 Q24 and Q34 Q14 26 NO contact AC max 250 V 5 4 A stage 1 Q24 27 NO contact AC max 250 V 5 4 A stage 2 Q34 28 NO con...

Page 11: ...1000 D1 D2 Potential free contacts window contact presence detector etc Y1 Y2 Thermal valve actuators AC 24 V Y1 1 Y2 1 Motor driven valve or damper actuators AC 24 V 3 point Y1 2 Y2 2 Electro mechanic valve actuators AC 24 V 2 point Q1 3 speed fan Q1 1 1 speed fan Twisted pair STOP Note Fans on relay outputs Q14 Q34 may not be switched in parallel Use isolating relays or separate I O blocks to ru...

Page 12: ... different voltage on the internal transformer of the controller and on the UA1T power amplifier supply 1 2 3 4 NS LS COM X1 AC 24 V Y1 1 Y1 2 3873Z13 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 N1PL Link IO Block RXM21 1 N2 Power amplifier UA1T see data sheet CA2N3591 Y1 Thermal valve actuators AC 24 V conne...

Page 13: ... CM2N3835en_01 Building Technologies 07 Mar 2012 Dimensions Without terminal covers 62 1 3 9 35 3 133 2 3873M14 3 3 4 4 With terminal covers RXZ20 1 to be ordered separately 62 1 3 9 35 3 167 112 4 107 8 51 5 5 3873M15 All dimensions in mm ...

Page 14: ...14 14 Siemens RXM21 1 PL Link IO Block CM2N3835en_01 Building Technologies 07 Mar 2012 86 3 43 2 78 39 3873M16 3 6 Drilling diagram 1 1 2012 Siemens Switzerland Ltd Subject to change ...

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