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12 Pelco Manual C454M-C (1/98)
3.2 WIRING INSTRUCTIONS
How your back box will be wired depends on the type of unit you have:
Units with an on-board receiver/driver
Units without an on-board receiver/driver (hard-wire applications)
Hardwire refers to installations using a remote receiver/driver or a true hardwire
controller.
Proceed to either Section 3.2.1, On-Board Receiver/Driver, or Section 3.2.2,
Hardwire or Remote Receiver/Driver.
3.2.1 On-Board Receiver/Driver
On models for suspended ceilings or hard ceilings, a plate is provided on the top of
the back box with 1/2" and 3/4" conduit knockouts.
1. Bring the wiring to the back box.
Video - Refer to Table A for the type of video coaxial cable to use.
Power - If the input power to the dome is 24 VAC, refer to Table B to determine
the size of wire to use. For outdoor units, make sure the wiring can supply
power for the heaters and fan as well as the receiver/driver. Refer to Section
5.0, SPECIFICATIONS, for power requirements.
Control - If you are using a Coaxitron
®
controller, the control signals to operate
the dome drive will be transmitted over the video coax.
If you are not using a Coaxitron
®
controller, bring wires to the back box for two
(2) RS-485 control lines (RX+ and RX-).
Refer to Figure 3, 4, or 5 for the following steps.
2. Install the coaxial cable to the BNC connector.
3. Install power to the 10-position terminal block. Make sure the power switch on
the side of the back box is off.
4. If you are not using Coaxitron
®
control, connect the control wiring to RXD+
and RXD-.
From controller To 4-wire terminal inside back box
TXD+ RXD+
TXD- RXD-
Proceed to Section 3.3, DOME DRIVE INSTALLATION.