Pelco BB5L operation manual From controller To 4-Wire terminal on circuit board, Rx+ Tx+

		CONNECTOR
HTR/FAN	VIDEO	FOR OPTIONAL
		TRANSLATOR

RS-422	SUBASSEMBLY
CONTROL
SIGNALS

PWR IN

RX–

RX+

TX–

TX+

FUSE

24 VAC

MIDDLE

PIN IS

GND

DOME DRIVE CONNECTOR

FAN

NOTE: Connect only a low volt- age device to the relay output. Maximum current rating of the re- lay contacts is two amperes.

CAUTION: The maxi- mum output of AUX 2 is 150 mA. If you connect a device that draws more current, you could destroy the output transistor. The output is intended to drive logic circuits or low-current devices. If higher current is required, connect the output to a relay.

CAUTION: Leave ad- equate slack in the wiring to permit the door to open without pulling on the con- nectors.

POWER
(24 VAC ONLY)	1.6 A

Figure 11. Interconnect Circuit Board for Spectra™ Lite

4.Control - If you are using a Coaxitron® controller, control signals will be trans- mitted 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+

5.Heater/Fan - The heater/fan is not used on indoor models.

6.	Alarm Inputs - (Spectra™ [Version 3.0] and Spectra II™ Only) If you need
	alarm inputs, connect them. The maximum number of alarm inputs is seven.
	Refer to Figure 6 for a typical wiring example. Alarm inputs require a ground
	signal through a contact closure, such as a switch.
7.	AUX 1 - (Spectra™ [Version 3.0] and Spectra II™ Only) An AUX 1 com-
	mand from the controller will activate the relay output. If you need the relay, wire
	it as required. Refer to Figure 6. The relay contacts are shown when AUX 1 is
	inactive. When an AUX 1 command is issued, the relay contacts will reverse and
	remain latched until a clear command is issued.
8.	AUX 2 - (Spectra™ [Version 3.0] and Spectra II™ Only) An AUX 2 command
	from the controller will place a ground at the output of AUX 2 to operate the device
	connected to it. The output will remain latched until a clear command is issued. If

you need the AUX 2 output, wire it as required. Refer to Figure 6 for typical wiring examples.The AUX 2 output is an open collector transistor driver which is capable of passing a maximum of 150 mA at 32 VDC. It is capable of driving TTL logic circuits or low-current reed relays. If you use an external relay, make sure that both the supply voltage and the current requirements are well below the maximum of 32 VDC and 150 mA. Exceeding these values will cause permanent damage to the dome. If you are not familiar with open collector drive requirements, contact Pelco technical support for assistance.

9.Close the door and tighten the thumbscrew securely.

10.Turn on power to the back box. The red LED on the interconnect door should light. The fan will not operate until a dome drive is installed.

If the LED does not light, correct the trouble before proceeding. Refer to Sec- tion 5.0, TROUBLESHOOTING.

14 Pelco Manual C1488M-A (9/98)