53
Configuring the short range galvanic
modem
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No setting is available for the short range galvanic modem on the HMI. There are how-
ever some settings that can be made on a DIP-switch located behind the cover around
the line connector at the back of the terminal according to figure
. After the connector
has been disconnected, if attached, the cover plate can be removed just by pulling at the
middle of the cover plate. No settings are located on the circuit board.
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Only switch 1 and 2 are used on the DIP-switch. The function is according to the setting
of timing signal, see table
. In normal operation switch 1 is set in ON position at one
end and switch 2 is set ON at the other end. The rest of the switches are set OFF.
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There are also some indication for supervision of the communication channel that can
be seen when the cover around the fibre optic connectors is removed. These LED’s are
found below the DIP-switch. The function of the LED’s are explained in table
.
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OFF
OFF
Unpredictable, normally locally created timing
OFF
ON
Timing recovered from received signal
ON
OFF
Locally created timing
ON
ON
Timing recovered from received signal
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Cover
plate
On
Off
1
2
3
4
DCD
RD
TD
1
2
3
4
5
Line
connector
Summary of Contents for REL 551 2.3 Series
Page 16: ...10 Note signs KDSWHU 6DIHW LQIRUPDWLRQ ...
Page 44: ...38 Checking the binary I O circuits KDSWHU KHFNLQJ WKH H WHUQDO FLUFXLWU ...
Page 52: ...46 Checking the self supervision signals KDSWHU QHUJLVLQJ WKH WHUPLQDO ...
Page 140: ...134 Testing the interaction of the distance protection KDSWHU 7HVWLQJ WKH SURWHFWLRQ V VWHP ...
