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6
Legend
Installation Manual
Power requirements
All Legend domes require a 24 VAC power supply to operate the domes' PTZ, camera, and heater/blower (if
present). The start-up and running power requirements vary depending on the model (Table 3).
Table 3.
Power requirements at 24 VAC (±4 VAC) operating voltage
Model
Dome without heater/blower
Dome with heater/blower
Rugged and HD dome with 25 W heater/blower
Power cable size and length requirements
Using the proper gauge of power cable will ensure proper operation and avoid voltage drops. See Table 4 for the
recommended cable gauge for varying maximum cable lengths for the different models of domes.
Table 4.
Recommended power cable gauges based on maximum lengths for an operating voltage of 24 VAC (±4 VAC)
Wire gauge
AWG
mm
2
10
2.60
12
2.05
14
1.62
16
1.29
18
1.02
20
0.81
22
0.64
Domes without
heater/blower
(30 W)
feet
meters
1565
477
985
300
620
189
390
119
245
75
150
46
95
29
Start-up power
Running power
30 W
60 W
100 W
Domes with
heater/blower
(60 W)
feet
meters
780
238
490
149
310
94
195
59
120
37
75
23
45
14
16 W
36 W
66 W
HD domes with
heater/blower
(100 W)
feet
meters
470
295
185
115
70
45
25
143
90
56
35
21
14
8
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