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Siemens Building Technologies
RXZ90.1 – Receiver with PPS2 interface
CA2N1644en
Building Automation
07.2001
Diagnostics and the diagnostic plug
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)
Tool socket
Series resistors
R = 11.2k
4 3 2 1
7
8
6 5
00495
LEDs (2mA) Button
2x green 1x red
RJ45 telephone-type socket
Cable (8-wire)
Green LED (<2mA)
Green LED (Optional,
lights up in event of
incorrect polarity)
Red LED
Pushbutton
Status
Red
LED signals
Installation mode
Permanently ON
Normal mode
Receiver's device list is empty
Rapid flashing
(approx. 5 times per s)
Normal mode
Receiver's device list not empty
1 room unit: 1 flash / 5 s pause
2 room units: 2 flashes / 5 s
pause
3 room units: 3 flashes / 5 s
pause
4 room units: 4 flashes / 5 s
pause
5 room units: 5 flashes / 5 s
pause
Normal mode
Receiver's device list not empty and
PPS2 communication not working
Flashes more slowly (approx.
once/s)
(e.g. during initialisation of the
controller after POWER ON)
Status
Green
LED signals
PPS2 power supply ON
ON continuously
PPS2 short circuit
OFF
Pushbutton
Action
Brief pressure <1s
Sets receiver to installation mode if
fewer than 5 room units in device list
