16
Important:
• The power supply of 24 V AC/12 V DC shall be insulated against 220 to 240 V AC.
• The power supply is automatically switchover either 24 V AC or 12 V DC. No setting is required
with this camera.
Connection of power cord
When connecting the power cord, use connectors that are designed for the power cord, and be
careful not to let the power cord fall off.
In addition, waterproofing work is needed at the joint, e.g., wrapping waterproof tape around the
joint.
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]
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
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
