Panasonic WV-CF634 - Page 16

16
Important:
 • Thepowersupplyof24VAC/12VDCshallbeinsulatedagainst120VAC.
 • Thepowersupplyisautomaticallyswitchovereither24VACor12VDC.Nosettingisrequired
with this camera.
Cable length and wire gauge
24 V AC
The recommended cable length and wire gauge are shown in the table for reference. The voltage
supplied to the power terminals of the camera should be within 19.5 V AC and 28 V AC.
Therecommendedwiresizefor24VACpowercordisshownbelow:
12 V DC
Calculation of the relation among the cable length, resistance, and power supply.
The voltage supplied to the camera shall be between 10.8 V DC and 16 V DC.
10.8 V DC ≤ V
A
- 2 (R x I x L) ≤ 16 V DC
L: Cable length (m)
R: Resistance of copper wire (Ω/m)
V
A
: DC output voltage of power supply unit
I: DC current consumption (A)
See specifications.
Resistance of copper wire [at 20 °C {68 °F}]
Copper wire
size(AWG)
#24
(0.205 mm
2
)
#22
(0.325 mm
2
)
#20
(0.519 mm
2
)
#18
(0.833 mm
2
)
#16
(1.307 mm
2
)
Length
(approx.)
(m) 20 30 45 75 120
feet 66 100 150 250 395
Copper wire
size(AWG)
#24
(0.205 mm
2
)
#22
(0.325 mm
2
)
#20
(0.519 mm
2
)
#18
(0.833 mm
2
)
#16
(1.307 mm
2
)
Resistance
Ω/m
0.083 0.052 0.033 0.020 0.013