WARNING: Make sure you wire power to the outer connectors of the terminal block and ground to the middle connector. Otherwise, you could damage the dome.
3.4 BACK BOX CONNECTIONS
Depending on the type of dome, refer to either Figure 10 or 11 to attach the wiring to the interconnect circuit board inside the back box. Also refer to Figure 6 or 7 if necessary.
1.Earth Ground - Connect earth ground to the middle connector on the power connector.
2.Power - Connect 24 VAC from the transformer to the outer terminals on the power connector. It does not matter which lead goes to which terminal.
If you are wiring more than one dome from the same transformer, it is impor- tant to wire the power connector in each dome the same way. That is, the wiring from one side of the transformer must be connected to the same con- nector on each dome. If you reverse the wiring, the cameras will be out of phase with each other and may produce what appears to be vertical roll when switching between cameras. Refer to Figure 9 for a wiring diagram.
3.Video - Connect the coaxial cable to the BNC video connector.
EXAMPLE: If each dome requires 20 vA, three domes require a 60 vA transformer.
Figure 9. Transformer Wiring
DOME 1 POWER
DOME 2 POWER
DOME 3 POWER
HTR/FAN
CONTROL
SIGNALS
1
VIDEO
CONNECTOR FOR OPTIONAL TRANSLATOR SUBASSEMBLY
2RX–
3ALARMS RX+45TX–
| 6 | TX+ | |
| 7 |
| |
| GND |
| |
| NO | RELAY | |
AUX 1 | COM | ||
| |||
NC |
| ||
|
| ||
| AUX 2 |
| |
| GND |
| |
|
| FUSE | |
| IN | 24 VAC | |
| PWR | ||
| MIDDLE | ||
|
| PIN IS | |
|
| GND | |
POWER |
|
| |
(24 VAC ONLY) |
| 1.6 A |
DOME DRIVE CONNECTOR
FAN
Figure 10. Interconnect Circuit Board Electrical Connections for Spectra™ (Ver. 3.0) and Spectra II™
Pelco Manual | 13 |
