Pelco EU3512-3X Manuel d'utilisateur télécharger pdf (Page 8)

8 C2428M-B (1/06)

Example: An enclosure that requires 30 VA and is installed 94 feet (28 m) from the transformer would

require a minimum wire gauge of 20 AWG.

NOTE:

Distances are calculated in feet; values in parentheses are meters.

*Minimum cable requirements:

75 ohms impedance

All-copper center conductor

All-copper braided shield with 95% braid coverage

Operation

The enclosure has a thermostatically controlled heater that is set to turn on at 50°F (10°C) and turn

off at 80°F (27°C). The defroster operates continuously.

Maintenance

Regularly scheduled maintenance prolongs the operational life and appearance of the equipment.

Clean the window regularly with a soft cloth using a mild, nonabrasive detergent and water to

maintain picture clarity.

Table B.

24 VAC Wiring Distances

The following are the recommended maximum distances for 24 VAC applications and are calculated with

a 10 percent voltage drop. (Ten percent is generally the maximum allowable voltage drop for AC-powered

devices.)

Wire Gauge

Total VA

20 AWG

(0.5 mm

)

18 AWG

(1.0 mm

)

16 AWG

(1.5 mm

)

14 AWG

(2.5 mm

)

12 AWG

(4.0 mm

)

10 AWG

(6.0 mm

)

10 283 (86) 451 (137 716 (218) 1142 (348) 1811 (551) 2880 (877)

Maximum distance from

transformer to load

20 141 (42) 225 (68) 358 (109) 571 (174) 905 (275) 1440 (438)

30 94 (28) 150 (45) 238 (72) 380 (115) 603 (183) 960 (292)

40 70 (21) 112 (34) 179 (54) 285 (86) 452 (137) 720 (219)

50 56 (17) 90 (27) 143 (43) 228 (69) 362 (110) 576 (175)

Table C.

Video Coaxial Cable Wiring Distances

Cable Type* Maximum Distance

RG59/U 750 ft (229 m)

RG6/U 1,000 ft (305 m)

RG11/U 1,500 ft (457 m)

1 2 3 4 5 6 7 8 9 10 11 12

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Pelco EU3512-3X Manuel d'utilisateur Page 8

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