CAUTION: The ceiling tile must be capable of supporting 16 pounds (7.3 kg) of weight. If the ceiling tile will not support this weight, use the op- tional
CAUTION: Be careful not to cut outside of the line. If you do, you may not be able to install the back box. Also, the trim ring may not cover the hole.
3.1.2Suspended Ceiling
1.Remove the ceiling tile from the ceiling.
2.Locate the center point to drill a hole in the tile.
3.Drill a hole in the ceiling tile using a
4.Remove the compass tool from the parts bag (refer to Figure 2). Press the stud of the compass tool into the hole in the ceiling. Insert a pencil in the hole in the other end of the compass and mark a circle on the ceiling.
5.Carefully cut the circle out of the ceiling tile.
6.Remove the conduit fitting, lock nut, and safety chain bracket from the parts bag and attach them to the back box as shown in Figure 3.
7.Refer to Figure 4. Compress the spring clips on the back box with your hands and push the back box through the hole in the ceiling tile. The spring clips will spring out when they clear the ceiling tile.
8.Refer to Figure 5. Tighten the screws until the spring clips hold the back box firmly to the ceiling tile.You will hear a clicking noise when the screws are tight. Do not install the ceiling tile in the ceiling yet.
Proceed to Section 3.2, WIRING.
3.2 WIRING
NOTE: The dome will stop oper- ating if the voltage at the dome drops below 18 VAC. It will turn back on when the voltage exceeds 18 VAC.
Table A. 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) |
|
|
*Minimum cable requirements: 75 ohms impedance
Bring wiring to the back box opening in the ceiling. Do not attach the wiring to the back box. You will do that later.
Refer to Figure 6 for the wiring diagram for Spectra™ (Version 3.0) and Spectra II™, and to Figure 7 for the Spectra™ Lite.
Wiring is required for power, earth ground, and video.
Refer to Table A for the type of video coaxial cable to use.
Input power is 24 VAC only. Power consumption is 25 vA per dome for indoor models and 90 vA for outdoor models. Refer to Table B to determine the size of wire to use.
Use a 24 VAC transformer with the following minimum vA:
30 vA per dome | For indoor models (without heater) |
100 vA per dome | For outdoor models (with heater) |
Refer to Figure 9 for wiring multiple domes from the same transformer.
If you will use a Coaxitron® controller, the control signals to operate the dome drive will be transmitted over the video coax. The
If you will not use a Coaxitron® controller, use the
Optional wiring may be provided for alarm inputs (maximum of seven), relay output, and auxiliary output.
Proceed to Section 3.3, BACK BOX INSTALLATION.
8 | Pelco Manual |
