Справочник Пользователя для Pelco E708-24S

To install the camera and lens, perform the following steps:

1.

Unsnap the two latches holding the rear end plate on the enclosure and slide the camera
sled out.

2.

Place the camera and lens at the maximum forward position on the sled. Adjust the
camera and lens so that they do not extend beyond the track. Attach camera and lens
with the 1/4-20 x .500-inch, hex head screws provided.

a.

An enclosure with a heater, a camera with a low optical centerline, or a camera
using a large diameter lens may require an elevation block (EB1 or EB2) for proper
positioning.

b.

Extend the lens to the maximum length before positioning the camera and lens
combination. This will ensure that the lens has enough clearance and will not hit the
window during focusing.

3.

Loosen the cable gland nuts on the back of the enclosure. Route video and power cables
through separate glands and connect to the camera. Tighten the gland nuts for a snug fit
around the cables. Refer to Table A for the type of video coaxial cable to use. If the
camera uses 24 VAC, refer to Table B to determine the size of wire to use.

4.

Close and secure the enclosure. Attach padlocks (not supplied) to the latches, if desired.

5.

Attach the enclosure to the mount or pan/tilt. Follow the instructions provided with the
mounting equipment.

Table A.  Video Coaxial Cable Requirements

RG59/U

 750 ft (229 m)

RG6/U

1,000 ft (305 m)

RG11/U

1,500 ft (457 m)

*  Minimum cable requirements:

75 ohms impedance
All-copper center conductor
All-copper braided shield with 95% braid coverage

Table B.  24 VAC Wiring Distances

The following are the recommended maximum distances for 24 VAC applications and are cal-
culated with a 10-percent voltage drop. (Ten percent is generally the maximum allowable volt-
age drop for AC-powered devices.)

20

18

16

14

12

10

10 vA

283 ft

451 ft

716 ft

1142 ft

1811 ft

2880 ft

(86 m)

(137 m)

(218 m)

(348 m)

(551 m)

(877m)