- 5 -
Use the formula below to select
the correct power supply for
cameras connected in parallel
(positive to positive, negative to
negative):
Total current for a 24 VAC
system:
TOTAL CURRENT = (202mA x total number of cameras) Example: 202mA x 5 total cameras = 1010mA
Note: 202mA is camera plus power supply
CAMERAS VOLTAGE CURRENT POWER
1 24 VAC/VDC 102mA 2.5W
2 24 VAC/VDC 210mA 5W
3 24 VAC/VDC 331mA 7.9W
4 24 VAC/VDC 487mA 10.9W
CABLE AND POWER GUIDELINES
This chart shows the proper current needed for power supplies for Q-View Series
cameras. Use Class 2 Power only. Input voltage must be
24 VAC/VDC.
Power Supply Cable Maximum Length (feet/meters)
CAMERAS TOTAL LOAD POWER SUPPLY 24 AWG 22 AWG 18 AWG 16 AWG
1 2.5W 24 VAC/VDC 1718/523 2733/833 6909/2106 10985/3348
2 5W 24 VAC/VC 834/254 1327/404 3356/1023 5335/1626
3 7.9W 24 VAC/VDC 529/161 842/256 2129/649 3385/1032
4 10.9W 24 VAC/VDC 359/109 572/174 1447/441 2300/701
NOTE: The above table is based on a "worst-case" power supply. Using a regulated or switching power supply can increase your cable
distance. Videolarm recommends using our PS24 power supply, or a CSA/UL listed Class 2 power supply.
Video Cable Maximum Length (feet/meters)
Cable Type RG-59 RG-6 RG-11
Wire Gauge 23 AWG* 18 AWG* 16 AWG*
Max. Length 750/229 1500/457 2000/610
* Copper clad steel core, 95% braided shield
AWG 250/76 500/152 1000/305 1500/457 2000/610 3000/914
18 31 61 131 191 261 401
20 51 101 201 301 401 591
22 81 171 331 481 661 991
24 131 261 521 781 1081 1631
Maximum Length (feet/meters)
The QRH is setup with (2) individual power inputs.
1. Accessory Power (yellow and green wire)
2. Camera Power (red and orange)
If you wish to provide a single power transformer it is recommended
that:
1. Be certain that you know the total power consumption of the hous-
ing Heaters (25 watts) + Blowers (2 watts) + camera/pan-tilt (not
supplied)
2. Check the supplied wiring chart to be sure that you have the
proper gauge wire for the distance that you intend to run your
power wires.
3. Bring power to the 3 and 4 position of the power connector (yellow
and green wire)
4. Two jumpers are provided in the housing packet. Jumper from the
1
st
position to the 3
rd
position and from the 2
nd
position to the 4
th
position of the terminal block. Be careful not to short between the
yellow and green wires.
22
250
120
89
65
44
35
29
25
31
19
17
16
14
13
12
11
11
10
9
9
8
20
400
180
141
90
70
56
47
40
34
31
28
25
23
21
20
18
17
16
15
14
14
18
600
300
225
130
112
90
75
64
55
50
45
41
37
34
32
30
28
26
25
23
22
16
960
480
358
225
179
143
119
102
85
79
71
65
59
55
51
47
44
42
39
37
35
14
-
800
571
350
285
228
190
163
140
126
114
103
95
87
81
76
71
67
63
60
57
12
-
1300
905
525
452
362
301
258
215
201
181
164
150
139
129
120
113
106
100
95
90
10
-
-
1440
830
720
576
480
411
340
320
288
261
240
221
205
192
180
169
160
151
144
5.5
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
Maximum distance from transformer to load
Total vA
consumed
Wire Gauge
24k VAC Wiring Distances
The following are the recommended maximum distances for 24 VAC
with a 10% voltage drop (10% is generally the maximum allowable
voltage drop for AC powered devices).
Figure 5
Add 2 jumpers for
single power input
(11 paginas)
(10 paginas)
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