SerVision CVG-M Installation Manual - Connecting Sensors
SerVision
CVG-M Installation Guide
Connecting Devices to the CVG-M
15
Connecting Sensors
Sensors are devices that detect events such as a door being opened or a light being turned on. A dry-contact input
sensor can be connected directly to the unit. Alternatively, the sensor connector on the unit can be used to connect a
switch to change the active outline or the display on a connected CCTV monitor.
In addition, if you wish, you can connect either an ADAM Data Acquisition Module or an IA-3126-2 relay board to
the unit. Either of these devices makes it possible to connect up to 16 additional sensors to the unit.
Connecting a Sensor Directly to the Unit
The unit has one sensor connector (In1). You can use this connector to connect a dry-contact input sensor to the
unit. Alternatively, In1 can be used to connect a switch for one of the following purposes:
• Outline switch: If you are defining more than one outline (alternate sets of recording and event-handling
settings), you can connect a toggle (on-off) switch to In1 instead of a sensor. The switch can then be used to
change the active outline. For additional information, please refer to the TVG System Guide.
Note: Some alarm panels can also be connected to In1. When they are, they can function as automatic
outline toggle switches. For additional information, please consult the alarm panel vendor.
• CCTV-monitor display controller: If a CCTV monitor will be connected to the unit, you can connect a
push-button switch to In1 instead of a sensor. The button can then be used to change the display on the
monitor. For additional information, please refer to the TVG System Guide.
NOTE: It is possible to configure the CVG-M to use a single switch as both an outline switch and a CCTV-
monitor controller, but this is not generally advisable, because it is unlikely that you will find it
convenient to have the outline switched every time the CCTV display changes, and vice-versa.
To connect a sensor or switch directly to the unit:
1. Install the sensor or switch in its desired location in accordance with the manufacturer's instructions.
Note: If the sensor requires an external power supply, you may be able to connect it to the 12VDC Power
Out connector on the rear panel of the unit. However, bear in mind that the unit can supply a maximum of
250 mA (3W) of power. If the devices connected to the unit require more than this amount of power, you must
power some or all of them independently (see Supplying Power to Devices Connected to the Unit, page 10).
2. Connect the two wire contacts of the sensor or switch to the In1 connector on the rear panel of the CVG-M, as
illustrated in figure 10. Insert the wires into the connectors and tighten the screws below each connector to
hold the wires in place. It does not matter which wire you connect to each contact.
Figure 10: Connecting a sensor
Out1 In1
Sensor
Input/Output terminal block
CVG-M rear panel