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Pelco Manual C538M-A (3/04) 9
3.2.3.2 RJ-45 Data Cables
Because both RJ-45 connectors have the same wiring pin-outs, they require the
same “flipped” cable. In other words, the IN connector requires a “flipped” cable for
connecting the first unit to the CC1, and the OUT connector requires a “flipped”
cable for cascading other units. A “flipped” cable is as follows: Pin 1 of the cable at
one end becomes pin 8 at the other end. Refer to Figure 6.
Note that the active pin-outs are associated with the outer four pins; namely, 1, 2, 7,
and 8. All accessories on the System 9760 require that the “flipped” cable be used
to attach peripheral equipment. This includes the REL unit.
Figure 5. RJ-45 Pin-outs
Figure 6. RJ-45 Cable Types
NOTE:
Use the supplied “flipped”
or reverse cable for
all
data con-
nections to the relay unit whenever
possible.
NOTE REVERSE OR “FLIPPED” CABLE