Alarm Displays - Siemens SWT-3000 Equipment Manual

SWT 3000 Equipment Manual
If any faults should occur in the SWT 3000 unit errored signals must not under any circumstances
be transmitted to the distant station. For this reason the transmitter output can be short-circuited via
a relay. This relay is driven by the PU3 module (PON_PU signal) and only enabled if the unit is op-
erating properly.

Alarm displays

The alarm signals generated by the PU3 module are displayed via red LED on the front panel of
the SWT 3000. LED are provided for the following alarms:
SIEMENS
SWT 3000
Figure 4:
1.
2.
3.
The signals are low active and are fed to the LED drive via an integrated inverter module with a
+5V supply voltage.
© SIEMENS AG 2008
LID2
OK
Displays on the CLE module
Transmitter alarm SAL
Receiver alarm EAL
Signal/noise level alarm S/N
Edition p3_3_x 08/09
LID1
SAL
LIA EAL
S/N
>
CLE Module
CLE Module
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