PXA30-RS, PXA30-RS1,PXA30-RS2 Extension modules for ... - Persy

Functions 

DESIGO PX 

Extension modules 

for RS232 and RS485 

for the integration of third-party products 

9 281 

PXA30-RS 

PXA30-RS1 

PXA30-RS2 

• Integration of third-party equipment and systems into the DESIGO building 

automation and control system at the automation level 

• Plugs into the PXC00-U system controller or thePXC64-U and PXC128-U 

modular automation stations 

Integration of third-party equipment and systems into the BACnet automation level 

• Mapping and monitoring of third-party disciplines such as HVAC, lighting, PLCs etc. 

• Operates as a freely programmable system controller (like an automation station but 

without physical inputs and outputs) for standard or proprietary protocol solutions 

• Supports the monitoring of communications on the third-party bus with the 

PX Open Monitor tool. 

CM1N9281en_02 

30.03.2007 Building Technologies 

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Topology 

Types 

Compatibility 

Ordering 

2/8 

QAX... 

PPS2 

PXC... 

PXM20, PXM20-E 

DESIGO INSIGHT 

BACnet / LON, BACnet / IP 

PXC...-U 

PXA30-RS 

PXC...-U 

Siemens PXA30-RS, PXA30-RS1, PXA30-RS2 – Extension modules for RS232 and RS485 CM1N9281en_02 

Building Technologies 30.03.2007 

... bus 

Third party devices / systems 

9281z01 en 

PX-OPEN Monitor 

PXA30-RS Extension module for RS232 and RS485, up to 100 data points 

PXA30-RS1 Extension module for RS232 and RS485, up to 400 data points 

PXA30-RS2 Extension module for RS232 and RS485, up to 2000 data points 

(SCL: 1000 data points) 

The module is plugged into a PXC00-U system controller or a PXC64-U or 

PXC128-U automation station. 

When ordering, please specify the quantity, product name and type code. 

Example: 

30 Extension modules PXA30-RS 

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Mechanical design 

Mounting 

1 

9281Z02 

• Two-part snap-together housing (plastic) 

• Cover for contact protection 

• PCB with electronic components 

• RS485 connection terminals, 3-pole 

• RS232 D-sub 9-pin male connector 

• LED indication 

RX TX 

The extension module is plugged into the PXC00-U system controller or PXC64-U or 

PXC128-U automation station. 

It is important to follow the instructions supplied with the device, in particular: 

• Avoid touching the connector pins (ESD precautions) 

• Push the module firmly into position (1.5 mm) and check that it is securely in place 

so that the fine contact pins interlock properly. 

4 

3 

2 



9281z02 

1 Plug-in unit 

2 Device base 

3 PXA30-RS… extension module 

(always to the right) 

S 

9281Z06 

4 Other extension modules (commonly PXA30-N) 

Note: The PXA30-T and PXA30-NT also 

have a D-sub 9-pin connector. 

However, this is used for the modem 

connection to DESIGO. 

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Engineering 

Development environment 

Commissioning on the BACnet side 

Addressing 

Third-party commissioning 

Disposal 

4/8 

Engineering is carried out with the DESIGO TOOLSET (DTS): 

• The project is created with SYSTEM DESIGN (DTS-SD) 

• The completed project is exported to DTS-PX 

• PX SCL is available for free programming on PXC00-U, PXC64-U and PXC128-U 

modules fitted with the PXA30-RS… extension module 

• The PXA30-RS… extension modules do not support software tools for development 

of custom applications. These individual applications must be developed on the 

PXE-CRS platform. 

Commissioning on the automation side (BACnet) is carried out with DESIGO 

TOOLSET (DTS). 

• An address is assigned to the device 

• The application (for the coordination of the HVAC functions at the automation level) 

and the mapping tables for the field level are downloaded. 

Node setup via DESIGO TOOLSET 

Third-party systems are commissioned with the third-party manufacturer’s 

commissioning tool. 

Siemens Building Technologies provides a tool, PX OPEN Monitor, for the monitoring 

and analysis of data traffic on the third-party bus. The connector for this tool is on the 

front of the automation station. 

The device includes electrical and electronic components and must not be disposed of 

as domestic waste. 

Current local legislation must be observed. 



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Technical data 

RS232 interface Use Third party 

Baud rate 300, 600, 1200, 2400, 4800, 9600, 

19200, 38400 

(depends on software) 

Data bits 7 or 8 (depending on software) 

Stop bits 1 or 2 (depending on software) 

Parity None, even or odd 

(depending on software) 

Flow control Xon/Xoff, hardware or none 

(depending on software) 

Wiring Cable type 

Cable length 

9-core standard screened cable 

Max. 3 m 

RS485 interface Use Third party (electrically separated) 

Baud rate, data bits / stop bit(s), parity As for RS232 (depends on software) 

Wiring Cable type 

Standard RS bus cable 

Cable length 

Max. 1200 m 

Housing 

protection standard 

Protection standard to EN 60529 IP30 

Protection class Insulation protection class III 

Ambient conditions Normal operation Class 3K5 to IEC 721 

Temperature 0 ... 50 °C 

Humidity < 85 % rh 

Transport Class 2K3 to IEC 721 

Temperature – 25 ... 65 °C 

Humidity < 95 % rh 

Industry standards Product safety 

Automatic electronic controls for 

household and similar use 

Electromagnetic compatibility 

EN 60950-1 

Interference immunity EN 61000-6-2 

Emitted interference 

CE marking 

EN 61000-6-2 

Electromagnetic compatibility 89/336/EEC 

Dimensions See "Dimensions" 

Weight With / without packaging 75 g / 95 g 



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Connections 

RS232 serial 

RS485 

6/8 

STOP Note 

Screening 

1 2 3 4 5 

6 7 8 9 

9281z04 

1 DCD Data carrier detect 6 DSR Data set ready 

2 RXD Received data 7 RTS Request to send 

3 TXD Transmit data 8 CTS Clear to send 

4 DTR Data terminal ready 9 NC Not connected 

5 GND Signal ground 

S 



9281Z05 

+ Tx 

– Rx 

S Screen 

The "S" terminal is not connected to the circuit. The cable screen must be earthed in 

the cabinet . 

S 

S 

9281z20 

9281z21 

Avoid screen pigtails! 

Screen clamp 

Screen bus Support rail 

9281z22 

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Dimensions 

Dimensions in mm 

111 

28 

62 

S 



9281M01 

33 

7/8 

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© 2006 - 2007 Siemens Switzerland Ltd. Subject to change 


Building Technologies 30.03.2007

PXA30-RS, PXA30-RS1,PXA30-RS2 Extension modules for ... - Persy

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