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 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)
