Tech Tips

The SecurLAN™ SL508 Alarm Processor Unit (APU) was developed specifically for use in alarmed carrier PDS systems. This APU has been evaluated and tested by the Space and Naval Warfare Systems Command (SPAWAR) and also by the U.S. Air Force and the U.S. ARMY.

Each facility or campus is unique, with a unique set of characteristics and environmental conditions, FSI has created a tuning and calibration software tool for manual adjustment of the APUs. For optimal performance of the system, each FSI Alarm Processor Unit is tuned and calibrated by a trained and certified systems integrator to match the specific environment that they are protecting.

Download the following Tech Tip to understand how to tune the FSI APUs for PDS applications.

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Outdoor applications of fiber-optic perimeter intrusion detection systems expose the sensor cable to a wide variety of stimuli ranging from high winds, rain, and in some cases even the signals associated with trains, trucks and other vehicles.


Fiber SenSys Fiber Defender® Alarm Processors

You can download the side-by-side comparison of our alarm processor units here:


Fiber Defender 300 Series Comparison Chart 1

Fiber Defender Series Comparison Chart 2

A well rounded and regularly followed PM program will ensure that your Fiber SenSys system will continue to perform as designed to high industry standards for many years.

The successful installation of a fiber optic security system is achieved by a thorough understanding of the security needs of the site to be protected as well as proper deployment of the sensor cable. The application note and drawing schematics contained in this Tech Tip will help the reader understand proper installation techniques.

One of the most useful features of the Fiber Defender Alarm Processor Unit (APU) is its ability to provide valuable diagnostics to the user.  This information can be used to document system performance, and if the system is detecting poorly or if it spontaneously generates an alarm, corrective actions can often be deduced from the diagnostics.