User manual
VDC-295IDH
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2.7 Connections
RS-485/-422 connection
The dome camera can be controlled remotely by an external device or control system, such
as a control keyboard, using RS-485 half-duplex, RS-422 duplex or a serial simplex
communications signals. Connect Rx+ and Rx- with Tx+ and Tx- of the RS-485 control
system.
If the control system is RS-422, connect Rx+(Tx+), Rx+(Tx-) and Rx+, Rx- of the dome
camera to Rx+, Rx- and Tx+, Tx- of the control device respectively.
Monitor connection
Connect the video output (BNC) connector to the monitor or the video input.
Connecting alarms AL 1 to 8 (alarm input)
You can use external devices to make the dome camera react to events. Mechanical or
electrical switches can be wired to the AL (alarm input) and GND (ground) connectors.
See chapter 3 for programming and operating alarm inputs.
Note:
All connectors marked with GND have the same reference.
Connect the ground side of the alarm input and/or the alarm output to the GND connector.
NC (NO) 1 to 4 (normally close or normally open: alarm output)
The dome camera can activate external devices such as buzzers or lights. Connect the
device to the NC (NO) (alarm output) and COM (common) connectors.
See chapter 3 for programming and operating alarm inputs
Connecting the power
Connect the plug of the power supply unit (24 V AC, 850mA) to the dome camera.
Only use certified/listed class 2 power sources.
