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How to connect
Fibre optic connection
RX1
RX2
LD-63
TX1
TX2
RS-232/V.24
or
RS-422/485
NB When a multidrop connection ends with an LD-63 and the fibre pair is
connected on channel 2, the switch S1:2 must be set (Y-mode)
Connection of RS-232/V.24, RS-422, RS-485
RS-232/V.24
equipment
SG TD RD
PWR
TD RD
C
Ch1
OPTO LINK MONITOR
LD-64
Rx1
Rx2
*) The designations T+, T–, R+, R– are not standardised and may vary between different manufactures. The first
step in fault finding is to reverse the cables (swap T+ with T– and/or R+ with R–). Please note that this should
be done only at one end!
6072-2004
All manuals and user guides at all-guides.com
RX1
RX2
LD-63
TX1
TX2
RS-232/V.24
or
RS-422/485
R+
R- T+
1 2
E
C
E
Ch2
T
+
T
RS-422
equipment
RS-232/V.24
RS-422/485
Rx2
Tx1
Tx2
POWER
T-
3
4
5
N
L
*
–
R
+
R
–
RX1
RX2
LD-63
TX1
TX2
or
RS-422/485
Rx2
Tx1
Tx2
RS-422/485
POWER
R+
R- T+
T-
1 2
3
4
5
N
L
*
T
+
T
–
RS-485
equipment
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