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XX134-44-02 Rev 710 SurveyorVFT Camera Dome Programming Programming Menus • 15

Alarm Handling

The Alarm Input Controller menu is used to program the tremendously flexible

alarm processing features of the SurveyorVFT. This device can intelligently process

and respond to alarms without the need of an external CPU or controller. Many

standalone applications can be built around the processing capability of the

SurveyorVFT.

For example, a single unit could be placed in the vestibule of a building. Using the

built-in features, the following scenario is easily accomplished. A person walks into

the vestibule from the outside. A door contact on that door triggers the

SurveyorVFT to take a picture of the person. At the same time, a relay driver

completes a circuit, which locks the inner door, preventing open egress. Once in the

vestibule, a motion detector connected to the dome senses that the person has

moved over to the intercom and turns a brighter light on in the vestibule. The dome

moves over to a shot of the intercom, allowing us to clearly see which call button is

pressed.

When the outside door is fully closed, the buzzer is enabled to allow passage from

the vestibule into the building. All activity has been taped on an event driven VCR or

DVR, also triggered by the dome. In the event that a “panic button” is pressed, an

auto-dialer could also be connected to call the police. This illustrates how a single

dome can do the work of several systems in a standalone application.

The first option on the Alarm Input Controller menu, Enable/Disable Input,

determines whether the 4 alarms are active. These alarms may all be turned on and

off individually, useful when a single alarm is malfunctioning, a door is propped

open, or an alarm event is only required on certain dates and times.

Report Enable is a function that allows the user to determine whether local alarms

are processed, and resolved, at the dome, switcher, or both. In the example of the

vestibule, if the “panic button” were connected to a larger system, we could have it

report directly to the CPU and have that camera display on a selected monitor.

Since the door opening is an occurrence that happens all day long, we do not

necessarily want the operator to intervene each time it happens. If this is enabled in

the SVFT-PRS, so an alarm warning is sent to the CPU, the on-screen display

message for Low Pressure will only appear until the CPU acknowledges it (in most

cases this will be less than 1 second and will be like a flicker).

The Active Alarm State menu chooses how individual alarm inputs respond when

contact closures are made (high) or broken (low) (in essence, normally open or

normally closed). On 23X/35X versions only, the hardwired alarm input control can

be replaced with motion alarm detection. This capability allows a motion detection

alarm to be reported to an external CPU.

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