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Pelco Manual C342M-PSA (11/98) 11
Table B. Requirements to Wire Power to Pan and Tilt Motors
Maximum Cable Length*
Wire Size 6 Conductors** 7 Conductors***
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)
* Cable distances are based on:
26.4 VAC output from the controller 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.
Table C. Maximum Cable Distances Using RB24 or RB115 Relay Boxes
RELAY
BOX
CONTROL
A
B
REQUIRED EXTERNAL
POWER SUPPLY
Wire Size Maximum “A” Maximum “B”
Distance Distance
20 AWG* 5,800 ft. (1,768 m)
18 AWG 8,250 ft. (2,515 m) Use Table B
16 AWG 13,000 ft. (3,962 m)
* Not recommended for reliable service between control and relay box..
NOTE:
Operation of the pan/tilt unit
at lower than 24 VAC will result in
reduced load and speed capability.