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12 Pelco Manual C523M-H (6/05)
b. A star configuration (going to each receiver from a central connecting point) is
sometimes more practical. Your installation will be easier to maintain and trouble-
shoot if you make all connections at a distribution block made of barrier terminals
or at a Pelco CM9760-CDU-T distribution panel (refer to Figure 12). The total
length of all control lines combined should not exceed 4,000 feet (1,219 m).
Figure 12. Making Receiver Connections at a Distribution Block (CM9760-CDU-T)
ALARMS
(1-9)
ALARMS
(10-18)
COM 1 (1-6)
COM 2 (7-12)
CONTROL
OUTPUTS
REMOTE KEYBOARD(S)
LOCAL
KEYBOARD
1 23456789
10
11
121314 15 161718
12345678910
11
12
0123
F
2
F
3
N
O
N
C
C
O
M
TT RR
+ +
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
Tx+
Tx-
Gnd
123
4
567891011121 13 14 15 16
10-24 AC/DC
OUT IN
100-240V
RECEIVER 1
RECEIVER 2
NOTE: USE
CM9760-CDU-T
ONLY WITH
2-WIRE
CONTROL.
NOTE: TO PROPERLY
SHIELD DATA CABLE
CONNECT GROUND
ON ONE END ONLY.
TO SCU
13579
246810
11
12 14
13 15
16
1
2
VIDEO INPUTS
VIDEO OUTPUTS
ALARMS
(1-9)
ALARMS
(10-18)
COM 1 (1-6)
COM 2 (7-12)
CONTROL
OUTPUTS
REMOTE KEYBOARD(S)
LOCAL
KEYBOARD
123456789
10
11
1213 14 15 1617 18
123456789
10
11
12
0123
F
2
F
3
N
O
N
C
C
O
M
TT RR
+ +
3
4