Installation instructions7SV512
V1
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C53000---G1176---C91
5.2.3 Checking the LSA data transmission link
For models with an interface for a central data pro-
cessing station (e.g. LSA) these connections must
also be checked. It isimportant to visually check the
allocation of the transmitter and receiver channels.
Since each connection is used for one transmission
direction, the transmit connection of the relay must
be connected to the receive connection of the cen-
tral unit and vice versa.
Transmission via optical fibre is particularly insensi-
tive against disturbances and automatically pro-
vides galvanic isolation. Transmit and receive con-
nectors are designated with the symbols for
transmit output and for receive input.
The normal signal position for the data transmission
is factory preset as ”light off”. This can be changed
by means of a jumper plug X91 which is accessible
when the plug-in module is removed from the case.
The jumper is situated in the rear area of the CPU
board (EPS) between the connector modules (Fig-
ure 5.3).
Jumper Position Normal signal position
X91 90 --- 91 ”Light off”
X91 91 --- 92 ”Light on”
R124
V 40
V39
X104
R94
X91
D11
X103
+
T4
T3
Jumper X90---X91 at delivery
Figure 5.3 Position of the jumper X91 on the CPU board (EPS)
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