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Pelco Manual C342M-D (8/05) 15
Table B. Requirements to Wire Power to Pan and Tilt Motors
Maximum Cable Length*
Wire Size 6 Conductors** 7 Conductors*** 5 Conductors****
120 VAC
PT780P Models
20 AWG 1,370 ft (417 m) 2,745 ft (836 m)
18 AWG 2,180 ft (664 m) 4,370 ft (1,331 m)
16 AWG 3,470 ft (1,057 m) 6,940 ft (2,115 m)
24 VAC
PT780-24P Models
20 AWG 59 ft (17.98 m) 118 ft (35.96 m)
18 AWG 94 ft (28.65 m) 188 ft (57.30 m)
16 AWG 149 ft (45.41 m) 298 ft (90.83 m)
12 VDC
PT780-VS Models
20 AWG 24 ft (7.3 m)
18 AWG 38 ft (11.58 m)
16 AWG 60 ft (18.28 m)
* Cable distances are based on:
26.4 VAC output from the controller (24 VAC models), or
132 VAC output from the controller (120 VAC models), or
12 VDC output from the controller (12 VDC models), and
10% cable loss with both motors (pan and tilt) running simultaneously
** Six conductors for operating pan and tilt motors:
Pin number in 37-pin connector Function
3 Left
7 Right
6 Down
5Up
1 Motor Common
8 Safety Ground
*** Same as six conductors except uses two wires for motor common.
**** Same as six conductors except motor common is not used.
NOTE: Operation of the pan/tilt unit at lower than 12 VDC, 24 VAC, or 120 VAC, depending on model, will result in reduced
load and speed capability.