Revo REVDPTZ10-1 - Manual (Page 16)

2.8 Connecting Wiring
2.8-1 Connecting to the RS-485
The dome camera can be controlled remotely by an external device or
control system, such as a control keyboard, using RS-485 half-duplex.
Connect Marked Rx+, Rx- to Tx+ and Tx- of the RS-485 control system.
2.8-2 Connecting Video out connector (if RS-485 connecting)
Connect the video out(BNC) connector to the monitor or video input.
2.8-3 Connecting Alarms
You can use external devices to trigger the dome camera to go to the
preset position set in the alarm menu when an alarm occurs.
Alarm In / ALARM COMMON
Mechanical or electrical switches can be wired to the ALARM IN and
ALARM COMMON. The alarm input has a series resistor ( 1k ohm)
and the pull-up resistor (22k ohm) on 5VDC. The alarm common is the
ground level. The threshold voltage is 4.3V and should be stable for at
least 0.5 seconds to be detected.
See Chapter 3 Program and Operation for configuring alarm input.
Be careful when routing the cable from the camera to the alarm device. Try
not to put unnecessary strain on the cable or connectors. The cable can be
damaged if pulled by the connectors. Do not place the cable next to
fluorescent lights; interference may result. Do not use staples to support the
cable, as you may damage the cable. If the provided camera cable is not
long enough, do not substitute a telephone cable. Using a telephone cable
could damage the camera and/or alarm device. Alarm cable may be added
to the alarm device cable if it is not long enough. All connections should be
properly connected and insulated to prevent electrical shock and fire hazards.
CAUTION
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