Справочник Пользователя для Pelco C579M
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.
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.
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.
possible.
NOTE REVERSE OR “FLIPPED” CABLE