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Diagnostics and the diagnostic plug
Tool socket
Series resistors
R = 11.2k
6/11
Siemens Building Technologies
Building Automation
The process of establishing communication (receiver status) can be monitored by
connecting the diagnostic plug to the receiver.
The plug can be assembled in-house or ordered from your national Landis & Staefa
office. It is an aid for the service staff and cannot be purchased normally.
• Connections 3 and 4 are short-circuited by a pushbutton
• Connections 5 (+) and 6 (–) are used to operate a red LED
• Connections 7 and 8 are used to operate the green LEDs
(One of the two green LEDs will light up, depending on the polarity of the bus
power supply)
8
7
6 5
4 3 2 1
LEDs (2mA)
Button
2x green
1x red
Status
Installation mode
Normal mode
Receiver's device list is empty
Normal mode
Receiver's device list not empty
Normal mode
Receiver's device list not empty and
PPS2 communication not working
Status
PPS2 power supply ON
PPS2 short circuit
Pushbutton
Brief pressure <1s
RXZ90.1 – Receiver with PPS2 interface
RJ45 telephone-type socket
Cable (8-wire)
Green LED (<2mA)
Green LED (Optional,
lights up in event of
incorrect polarity)
00495
Red LED
Pushbutton
Red LED signals
Permanently ON
Rapid flashing
(approx. 5 times per s)
1 room unit:
2 room units:
pause
3 room units:
pause
4 room units:
pause
5 room units:
pause
Flashes more slowly (approx.
once/s)
(e.g. during initialisation of the
controller after POWER ON)
Green LED signals
ON continuously
OFF
Action
Sets receiver to installation mode if
fewer than 5 room units in device list
1 flash / 5 s pause
2 flashes / 5 s
3 flashes / 5 s
4 flashes / 5 s
5 flashes / 5 s
CA2N1644en
07.2001
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