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Videolarm qsdpc2-70na5 User Guide

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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 4 VAC 
system:
TOTAL CURRENT = (0mA x total number of cameras)   Example: 0mA x  total cameras = 1010mA
Note: 0mA 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 PS4 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
3Ω
6Ω
13Ω
19Ω
26Ω
40Ω
  20
5Ω
10Ω
20Ω
30Ω
40Ω
59Ω
  22
8Ω
17Ω
33Ω
48Ω
66Ω
99Ω
  24
13Ω
26Ω
52Ω
78Ω
108Ω
163Ω
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
Maxim
um distance fr
om transf
ormer 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