APC 66123 - Manual (Page 10)

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.