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8 Pelco Manual C379M-G (12/98)
Table B. Recommended Cable Distances Using RB115 Relay Box
Wire Maximum Maximum
Size Distance (feet) Distance (feet)
(Awg) “A” “B”
20 5,800 (1,768 m) 489 (149 m)
18 8,250 (2,515 m) 778 (237 m)
16 13,000 (3,962 m) 1,235 (376 m)
REQUIRES EXTERNAL
POWER SUPPLY
*Using 2-wire motor common
Conductors are for up, down, left, and right functions, motor common, and ground.
Cable distances are for both motors running and assuming a 10% voltage drop in
the cable.
Six-conductor cable, single common conductor is recommended. Distances are
approximate maximum recommended under the following conditions:
• Simultaneous pan/tilt activation
• Minimum 103.5 volts at pan/tilt
Operating distance may be extended by using an RB115 remote relay box. Refer
to Table B for extended cable distances.
Maximum Distance
6 Conductors 7 Conductors*
20 AWG 489 ft (149 m) 978 ft (298 m)
18 AWG 778 ft (237 m) 1,556 ft (474 m)
16 AWG 1,235 ft (376 m) 2,470 ft (752 m)
Table A. Maximum Cable Distances
A
B
RB115
MPT24DT/
MPTA24DT/
MPTAZ24DT