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Pin layout of RJ45
connector
Connection diagram
Caution:
Dimensions
CA2N3851en_02 / 12.01.2007
6/6
1
L
1 2 3 4 5 6 7 8
ON
2
L
ON
3
Not used
4
Not used
5
Not used
6
Not used
7
CP+
8
CP– PPS2 data
The same pin layout applies to the tool socket.
The built-in connecting cable with an RJ45 connector is used to connect the service
terminal to the tool socket of a DESIGO RXB / RXC controller, or to a QAX... room unit.
The service terminal communicates with the controller via the PPS2 interface. Addition-
ally, the bus is looped through the service terminal. RXC: this enables a PC for the
RXT10 service tool to be connected to the tool socket of the service terminal.
For correct operation of the service terminal, there must always be a room unit
connected to the controller. PPS2 communication is not possible without a room
unit.
Auto
-
+
1
Options for connecting the RXT20.1 service terminal:
1 To QAX... room unit
2 To RXC... room controller
3 Not possible without QAX... !
All dimensions in mm
90
© 2000 - 2007 Siemens Switzerland Ltd.
RXT20.1 – Service terminal
W
® -Bus (DESIGO RXC): CLA;
ORKS
W
® -Bus (DESIGO RXC): CLB;
ORKS
PPS2 data
Auto
-
+
2
32
34
EIB-Bus (DESIGO RCB): CE+
EIB-Bus (DESIGO RCB): CE–
80443 A
3
80088
4,2
56
60
Subject to change
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