ABB REL 551-C1 2.3 Series Installation And Commissioning Manual page 53

Line differential protection terminal
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Configuring the short range fibre optical
modem
Optical
21-15X/16X
fibres
REx5xx
<5km
Figure 9: Multiplexed link, short range fibre optical connection
S4
Figure 10: Jumper location on short range optical modem
The jumpers are accessible after the modem has been pulled out. This is done by first
removing all green 18-pin connectors at the back, then remove all screws holding the
back plate. After the back plate has been removed the modem can be pulled out.
Note!
Only pull out the modem not the whole double size Euro-card. After the jumper settings
has been changed put everything back in reverse order.
Note!
All electronic are sensitive to electrostatic discharge. Proper action must be taken at
the work place to avoid electrostatic discharge!
V.35/36 (15X)
X.21 (16X)
G.703 (16X)
xx00000542vsd
1
S3
JTAG/ISP
1MRK001471-BA
1MRK001471-DA
xx01000138.vsd
Chapter 8
Configuring the digital
communication modules
47

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