Siemens FS720 - Fiber-Optic Network Module FN2006; FN2007 Troubleshooting Steps

Repair
Fiber
-
optic network module FN2006 / FN2007 troubleshootin
g steps
24
165 |
178
Building Technologies
A6V10210416_j_en_
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Fire Safety
2018
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08
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29
24.12 Fiber-optic network module FN2006 / FN2007
troubleshooting steps
Faults on a specific line can be located by referring to the LED indicators and the
table below.
The following fault scenarios are examples that relate to node1, line1 and node2,
line2. Faults on the copper side concern line1 within node1, for example.
Item
Pwr
x
RX1 Fail1 EF1 LNK1 Possible cause LNK2 EF2 Fail2 RX2 Pwr x
Node 1 / line 1 Node 2 / line 2
1 ON ON OFF OFF
FLS
HG
Normal operation
FLSH
G
OFF OFF ON ON
2 ON OFF ON OFF OFF Optical fibers wrong way round
FLSH
G
OFF ON OFF ON
3a ON OFF ON OFF OFF Break in optical fiber RX1 OFF OFF OFF ON ON
3b ON ON OFF OFF OFF Break in optical fiber RX2 OFF OFF ON OFF ON
4 OFF OFF OFF OFF OFF Energy supply interrupted
FLSH
G
OFF ON
1
OFF
1
ON
5 ON ON OFF ON
2
FLS
HG
Ground fault at A1/B1
FLSH
G
OFF OFF ON ON
6 ON ON OFF OFF OFF A1/B1 wrong way round
FLSH
G
OFF OFF ON ON
7 ON ON OFF OFF OFF Break in A1 or B1
FLSH
G
OFF OFF ON ON
Table 9: Searching for faults on fiber optic cable network module based on LED status
1
Depending on which module with a fully intact supply is connected, RX1 / RX2
is OFF, and Fail1 or Fail2 is ON.
2
In the event of a ground fault, LED EF1 lights up and LED EF2 flashes (to
indicate that the ground fault is being forwarded).
Legend for LED patterns
LED OFF
LED ON, in relevant color
LED flashing [FLSHG], in relevant color