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Connection terminals
Tool socket
Connection diagrams
Siemens Building Technologies
Building Automation
Connecting a commissioning and service tool or service terminal to the tool socket
on the receiver provides access to the connected room controllers.
The bus cable is looped through to the tool socket for this purpose. The bus cable is
not affected by the receiver.
The PPS2 interface is also routed to the tool socket, enabling a service terminal to
be connected.
8
7
6
5
4
3
2
1
Standard RJ45 tool socket
1 2 3 4 5 6 7 8
Connecting the receiver to a DESIGO RXC room controller:
4 3 2 1
8
7
6 5
4 3 1 2
Tool
B
A
C
R1 RXZ90.1 receiver
N1 RXC... room controller
A Connection for RXT10.1 commissioning and service tool
B Connection for RXT20.1 service terminal with PPS2 interface
C Connection for diagnostic plug
RXZ90.1 – Receiver with PPS2 interface
PPS2 interface, power supply
80085
CP+
1
Device power supply, PPS2 data (positive)
CP–
2
Device power supply, PPS2 data (negative)
Bus connection (looped to tool socket)
C+
3
with LON bus (DESIGO RXC): CLA
C–
4
with LON bus (DESIGO RXC): CLB
5...8
Not used
Communication
1 with LON bus (DESIGO RXC): CLA
2 with LON bus (DESIGO RXC): CLB
3
4
5
6
7
CP+
PPS2 data
8
CP–
PPS2 data
R1
PPS2
PPS2
LON-Bus
Diagnostic plug
Button for installation
Button for installation
Red LED +
Red LED –
Green LED +
Green LED –
00476
N1
Twisted pair
9/11
CA2N1644en
07.2001
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