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Siemens 

QAX30.1, QAX31.1 – Room units with PPS2 interface 

CA2N1741en_02 

Building Technologies 

 

2015-12-23 

Connection terminals 

The tool socket on the room unit provides access to the connected individual room 
controller via the commissioning and service tool or the service terminal.  

The bus cable (Terminals 3 and 4) is therefore looped to the tool socket (Pins 1 and 2).  
The bus cable is not affected by the room unit.  

For connection of a service terminal, the PPS2 interface (Terminals 1 and 2) is also 
connected to the tool socket. 
 

8 7

6

5

4

3

2

1

C–

C+

CP

CP

+

80085

 

PPS2 interface, supply voltage 

CP+  1 

Device supply, Data PPS2 (pos.) 

CP–  2 

Device supply, Data PPS2 (neg.)

 

Bus connection (looped to tool socket) 

C+ 

With L

ON

W

ORKS

® bus (Desigo RXC): CLA 

C– 

With L

ON

W

ORKS

® bus (Desigo RXC): CLB 

 

5 ... 8  Not used 

 
Standard type RJ45 tool socket. 
 

1

320

6Z

01

2 3 4 5 6 7 8

 

With L

ON

W

ORKS

® bus (Desigo RXC): CLA 

With L

ON

W

ORKS

® bus (Desigo RXC): CLB 

Not used 

Not used 

Not used 

Not used 

CP+  

Data PPS2 

CP– 

Data PPS2 

Connection diagram (Example: RXC) 

The following example shows the room unit connected to a Desigo RXC room  
controller: 
 

17

41

A03

PPS2

Tool

A

R1

B

7 8 1 2

4 3 2 1

C–

C+

CP

CP

+

N1

CP

+

CP

CLA

CLB

PPS2

LonWorks® Bus

    = Twisted pair 

 
R1 

Room unit QAX30.1 

N1 

Room controller RXC... 

Connection for RXT10 commissioning and service tool 

Connection for service terminal with PPS2 interface 

Dimensions 

Terminal layout 

Tool socket  

All dimensions in mm 

.

.

.

Содержание QAX30.1

Страница 1: ...ket for commissioning and service tool or service terminal Use The room units are used in rooms controlled by an individual room control system to measure the room temperature and in the case of the QAX31 1 to adjust the room temperature setpoint They can also be used in conjunction with a Desigo PXC automation station The room units incorporate a socket for a commissioning and service tool or ser...

Страница 2: ...or mounting on a recessed conduit box with the cables connected from the rear The unit comprises a housing and base unit connected by releasable snap fittings The base unit accommodates the screw terminals which have an integrated terminal strip The housing accommodates a printed circuit board room temperature sensor element setpoint adjuster plug in connectors and a socket for the commissioning a...

Страница 3: ... cables Desigo PX uses two core cables see the respective installation guides Screening is not required Mounting The room unit is suitable for wall mounting and for mounting on a recessed conduit box Do not mount in recesses shelves behind curtains or doors or above or near heat sources Avoid exposure to direct sunlight or draughts The electrical wiring conduit must be sealed where it joins the ro...

Страница 4: ...PX CA110396 2 core or 4 core twisted pairs unscreened Connecting cable for service tool Off the shelf max 3 m Protection data Housing protection IP 30 to EN 60529 Protection class III to EN 60730 1 Ambient conditions IEC 721 Operation Transport Ambient air conditions Class 3K5 Class 2K3 Temperature 0 50 C 25 70 C Humidity 85 rH 95 rH Mechanical conditions Class 3M2 Class 2M2 Standards directives a...

Страница 5: ... Device supply Data PPS2 pos CP 2 Device supply Data PPS2 neg Bus connection looped to tool socket C 3 With LONWORKS bus Desigo RXC CLA C 4 With LONWORKS bus Desigo RXC CLB 5 8 Not used Standard type RJ45 tool socket 1 3206Z01 2 3 45 67 8 With LONWORKS bus Desigo RXC CLA With LONWORKS bus Desigo RXC CLB Not used Not used Not used Not used CP Data PPS2 CP Data PPS2 Connection diagram Example RXC Th...

Страница 6: ...5 32 36 4 2 60 80089 90 100 56 60 56 Published by Siemens Switzerland Ltd Building Technologies Division International Headquarters Gubelstrasse 22 6301 Zug Switzerland Tel 41 41 724 24 24 www siemens com buildingtechnologies Siemens Switzerland Ltd 2000 Delivery and technical specifications subject to change ...

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