Installing cable fittings
OmniTrax Product Guide Page 137
Installing decouplers on SC1 sensor cable
It is no longer a recommended practice to connect detecting SC1 sensor cables end to end
through decouplers to provide continuous detection between two cable sets. There are two revised
installation techniques: method 1 - use active loops to connect two cable sets and create a 4 m
overlap, and method 2 - use two terminators and create a 4 m overlap at the decoupler’s location.
The two revised methods provide superior detection at decoupler locations while enabling the
screening out of the high clutter signal that can sometimes occur near decouplers.
Method 1 enables power, data and processor synchronization via the sensor cables. Method 2 is
best suited for a closed perimeter with a single OmniTrax processor. If method 2 is used with 2 or
more processors, power and data cables are required for each processor, and synchronization
must be done over the network wiring via the NIC.
SC1 decoupler installation procedure (method 1 - active cable loop)
1. Refer to Figure 116: and the site plan to dig trenches or excavate the installation location for
the decouplers.
2. Form the two sensor cables into overlapping loops (see Figure 116:
).
3. Cut the first sensor cable at the specified location, and prepare the internal cables (see SC1
and SC2 cable strip dimensions on page 127).
4. Install one connector on the end of each internal coaxial cable (see Installing connectors on
SC1 and SC2 sensor cable on page 126).
Note Ensure the burial depth of the decouplers is at the same depth as the
remainder of the cables.
Note The two internal sensor cables in SC1 cable must be offset when
installing decouplers. (See SC1 and SC2 cable strip dimensions
on
page 127.)
Figure 115: SC1 decoupler installation
Figure 116: Connecting two SC1 sensor cables through decouplers (method 1, active loop)
SC1 sensor cable
male connector
decoupler
5 cm heatshrink
71 cm heatshrink
71 cm (28 in.)
terminator or
SC1 sensor cable
4 m 13 ft.
30 cm (1 ft.) min.
detecting cable overlap
decouplers
processor 1 A-side cable
processor 2 B-side cable
30 cm
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