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Chapter 1: System planning
12
FlexZone™ Product Guide
Figure 7: Single processor, double cable pass configuration
For a multi-processor FlexZone installation with a double pass of sensor cable
using software zoning, precise target locating, as well as power and data over
the sensor cables there are a number of requirements that must be observed.
Figure 8 illustrates a 1.8 km FlexZone perimeter with six processors and a
double pass of sensor cable.
• Each 48 VDC power supply can power to up to five processors over a
maximum length of 1.5 km of sensor cable. The power supply must be connected
to the central processor.
• The processors must be divided into blocks of two with network interface cards
(NIC) carrying the data between adjacent bocks (use multi-mode fiber optic NICs
to isolate the sensor blocks).
• The detection start points of each processor’s sensor cables must match, and
both cables must be of equal length and have identical features (e.g., service
loops, sensitivity loops, zone demarcation loops, etc.).
• Power flow, data flow and synchronization must be setup for each block of
sensors via the UCM.
Figure 8: Multi-processor, double pass ranging sensors with isolated power groups
1/3 fence height
1/3 fence height
1/3 fence height
A side cable
B side cable
identical features
300 m
matching
start points
matching
end points
terminator
terminator
300 m
300 m
300 m
300 m
300 m
300 m
power supply group
power supply group
48
VDC
48
VDC
NIC
processor
FlexZone
bi-directional data flow
power shared between
processors over both sensor cables
NIU
NIU
mmfo NIC
mmfo NIC
Summary of Contents for FlexZone Series
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