Pelco c1487-c Back BOX Connections, From controller To 4-Wire terminal on circuit board

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 RS-422 (P or D) control signals, connect the control lines from the controller to the circuit board. Connect the wires as follows:

From controller	To 4-Wire terminal on circuit board
RX-	TX-
RX+	TX+
TX-	RX-
TX+	RX+

				CONNECTOR
	HTR/FAN		VIDEO	FOR OPTIONAL
				TRANSLATOR
RS-422
				SUBASSEMBLY
CONTROL
SIGNALS	1
			RX–
	2			DOME DRIVE
	5	ALARMS	RX+
	3			CONNECTOR
	4
			TX–
	6		TX+
	7
	GND
	NO	RELAY
AUX 1	COM
	NC
	AUX 2
	GND
			FUSE	FAN
	IN		24 VAC
	PWR
			MIDDLE
			PIN IS
			GND
POWER
(24 VAC ONLY)			1.6 A

Figure 12. Interconnect Circuit Board Electrical Connections for Spectra II™

Pelco Manual C1487M-C (7/99) 13