BACK BOX CONNECTIONS
WARNING: Make sure you wire power to the outer con- nectors of the terminal block and ground to the middle connector. Otherwise, you could damage the dome.
DOME 1
POWER
DOME 2
POWER
DOME 3
POWER
EXAMPLE: If each dome requires 30 vA, three domes require a transformer with a minimum output of 120 vA (refer to the Wiring section for transformer require- ments).
Figure 11. Transformer Wiring
Refer to Figure 12 or 13 to attach the wiring to the interconnect circuit board inside the back box. Also refer to Figure 8 or 9 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 important 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 connector 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 11 for a wiring diagram.
3.Video - Connect the coaxial cable to the BNC video connector.
4.Control - If you are using a Coaxitron® controller, control signals will be transmitted over the video coax.
If you are using
From controller | To |
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RX- | TX- |
RX+ | TX+ |
TX- | RX- |
TX+ | RX+ |
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| CONNECTOR |
| HTR/FAN | VIDEO | FOR OPTIONAL | |
| TRANSLATOR | |||
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| SUBASSEMBLY | |
CONTROL |
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SIGNALS | 1 |
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| RX– |
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| 2 |
| DOME DRIVE | |
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| 5 | ALARMS | RX+ | |
| 3 |
| CONNECTOR | |
| 4 |
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| TX– |
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| 6 |
| TX+ |
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| 7 |
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| GND |
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| NO | RELAY |
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AUX 1 | COM |
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NC |
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| AUX 2 |
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| GND |
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| FUSE | FAN |
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| IN |
| 24 VAC |
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| PWR |
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| MIDDLE |
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| PIN IS |
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| GND |
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POWER |
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(24 VAC ONLY) |
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| 1.6 A |
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Figure 12. Interconnect Circuit Board Electrical Connections for Spectra II™
Pelco Manual | 13 |
