APC 66123 User Manual
10 - 3402230800/AC
2 wires connection
Card settings of an intermediate cabinet
Others settings
SA1
SA2
SA1
OFF ON
1
8
SA2
OFF ON
1
8
SA2
SA2
SA2
SA1
SA1
SA1
5
L +
4
3
2
1
L -
5V
Rp
Ra
Rp
0V
Ra
0V
Ra
0V
L-
L-
L+
L+
L-
L-
L+
L+
3
7
2
4
1
3
2
4
1
3
polarity
connection
if end
of the line
polarity
transmit/receive
data
transmit/receive
data
transmit/receive
data
termination
termination
Master unit
Card of an end-of-line cabinet
connection
if end
of the line
3V3
SA1-3
3V3
SA1-3
Card of an intermediate cabinet
SA2
OFF
ON
8 7 6 5 4 3 2 1
SA1
SA1
OFF ON
8 7 6 5 4 3 2 1
SA1
Link without polarity and without termination.
SA2
OFF
ON
8 7 6 5 4 3 2 1
SA1
SA1
OFF ON
8 7 6 5 4 3 2 1
SA1
Link with termination.