
INSTALLATION AND OPERATION INSTRUCTIONS — FENCE PROTECTION SYSTEMS
20
3 THEORY OF OPERATION
Concept
When the Transducer Sensor Cable experiences small mechanical shocks or vibrations, an electrical
signal is generated between the center conductor and the outer shield.The Signal Processor then
analyzes that signal and makes the determination as to whether the vibration is intruder related or
from natural causes such as wind, rain, hail, etc. Should there be an intruder, the signal processor will
generate an alarm output.
There are two types of alarm processing methods available: Standard and EDAPT. The standard system
processes alarm information based on individual settings programmed at each processor.The EDAPT
system utilizes a computer modeling program to analyze the fence activity of each alarm zone and
automatically adjust the alarm threshold based on current fence conditions and historical data.
Alarm processing
The Senstar FPS system is a strain-sensitive cable sensor system, meaning that a mechanical disturbance in
the fence causes a small strain on the sensor cable that is converted to an electrical signal.
The sensor cable is a small coaxial cable specially manufactured with a permanent electrical charge
throughout its entire length. Any movement in the fence causes a small voltage to appear at the
sensor cable output. Senstar tests every foot of the sensor cable to verify that the alarm sensitiv-
ity will be uniform over the entire length.
The sensor cable connects to the FPS processor mounted on or near the fence at the beginning of the
detection zone.The mechanical disturbance detected by the sensor cable is sent to the FPS Processor.
Each FPS-2-2 processor contains two independent zones of perimeter protection (see Figure 10).The
typical FPS-2-2 will have up to a 1000-foot alarm zone running in each direction from the processor
unit.The standard processor circuitry analyzes the disturbance detected by the sensor cable (see
Figure 11).The electronics are designed to match the characteristics of the sensor cable and only
report as alarms those signals that are similar to the disturbances caused by climbing, cutting, or lifting
the fence fabric.
The EDAPT advanced processor sends alarm data to the MX-1000/5000 communications and Control
System for additional processing. The EDAPT advanced processor MX-1000/5000 Control System is
capable of storing and analyzing each zone’s alarm data over time. The alarm data is used in a unique
calculation to best determine the occurrence of an actual alarm condition over the external physical
forces (wind, rain, etc.), and the aging conditions of the fence installation.
The detected alarm signals are sent by the processor to the alarm monitoring and control point. Alarm
monitoring can be accomplished in a number of ways. Senstar recommends the MX-1000/5000 Communi-
cation and Control Center, which uses the exclusive CEnDe multiplex alarm communications system,
reporting up to 60 alarm zones. The EDAPT system must operate with an EDAPT advanced processor
MX-1000/5000 Control Center and the CEnDe communications system. Senstar also manufactures the FPS-
2-2R processor, containing both alarm and tamper relay outputs, for interfacing to monitoring equip-
ment by other manufacturers.