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VTW-400 Taut Wire Fence

VTW-400 Taut Wire Fence

♦ VTW-400 Taut Wire Fence – DeTekion Security Systems VTW-400 electronic taut wire fence detection system is a mature solution now distributed locally by Perimeter Systems Australia.

With wires strung taut between anchor posts and clamped to the VTW-400 sensor post, the VTW-400 Taut Wire forms a physical barrier that will signal an alarm condition in event of intrusion attempts.

The VTW-400 Taut Wire Detection System can be mounted as a stand-alone system, mounted on an existing fence, or mounted on a wall or roof. Sectors can extend up to 100 metres and a zone can be one sector or several sectors wired together.

Each sector requires an anchor post at each end, one sensor post with processor in the centre of the zone, and slider posts spaced 3 metres on centre. Wire is strung taut between the anchor posts and clamped at the sensor post and wire tensioners maintain the proper tension on the wires.

Managing the perimeter is the NEMA-rated FP-400 processor, which constantly monitors up to 32 sensors. Through multiple sensor sampling and multiplexing. If the sensor value is outside a stored window of normalcy, the FP-400 reports an alarm by activating an internal alarm relay.

The FP-400 processor uses a dual window alarm capturing system. If a taut barbed wire is cut, or if any internal wiring is broken, a trouble alarm relay is activated. The remaining fence post sensors will still be functional and able to report alarms.

Trouble alarms are automatically reset after the trouble condition is corrected. The design also allows the taut wire system to self-adjust for environmental conditions and to provide for various levels of sensitivity (user programmable) of the individual sensors.

This technique practically eliminates false and nuisance alarms. An available option can monitor which ‘side’ of a sensor is stressed, allowing one sensor to monitor a pair of 50m zones simultaneously.

On-board diagnostics allow a maintenance technician to easily troubleshoot the activity of the processor and the reading, long term average, alarm and trouble states, and set points for each sensor can be displayed at any time – it’s not necessary to take the unit out of service for diagnostics.

Contact Perimeter Systems Australia for more information about the VTW-400 taut wire system.

Features of the VTW-400:

* False Alarm Rate (FAR): <3 per year per km
* Temperature: –30 to +70 degrees C
* Wind: Up to 100 mph (160 Kph)
* Sensitivity: Field adjustment via software
* Operating Temperature: –30 to +70 degrees C
* Input Power: 10-30 VDC, 200 milliamps
* Weight 0.9kg
* Inputs: 32 STW-40 taut wire sensors, DC input power
* Outputs: 2 alarm relays (Form C),
* Trouble Relay (Form C)
* Tamper Alarm Contact; RS-422 port
* Comm Port: RS-485/RS-232 port
* Controls: Single zone/dual zone jumper
* Mean Time Between Failure (MTBF): 20,000 hours
* Tamper Protected: Yes, via internal tamper switch
* Diagnostics: Software via laptop computer.
* User adjustable sensitivity levels for each wire
* Extensive diagnostic features
* Immune to EMI and RFI
* Automatic temperature compensation
* Available as stand-alone or wall mount
* Corrosion resistant stainless steel.

#SEN #SENnews #security #electronics 

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