Developing the Site Plan
2-17
as shielding, absorbing, range sensitivity adjustment, or barriers can also be used. See
Chapter 9, ”Troubleshooting and Maintenance” for more information.
Existing Interference
Interference from RF and electrical sources can degrade system performance and must
also be considered in the site design. Fluorescent lights, neon signs, nearby radio sta
-
tions, or power lines can interfere with the optimal operation of the system. The mag-
netic impulse noise from relays that control gate opening and closing can also disrupt
the RF signal.
Interference may degrade both reader and tag performance. Existing interference at
the site may be shielded, removed, or positioned further from the Encompass 4 Reader
and/or antenna. In some cases, changing the operating frequency of the Encompass 4
Reader may provide a simple solution. Readers in proximity should have at least a 2
MHz frequency separation. See
“Other Encompass 4 Readers in the Area” on page 2-
13.
Strong RF sources of any frequency, in proximity to the tag, can preclude the tag
receiving the reader interrogation (see Chapter 9, ”Troubleshooting and Maintenance” ).
Electrical and Communications Requirements
All construction work at the site must be completed before installing the Encompass 4
Reader. Electrical and communications cables should be installed according to all
applicable local and federal building code requirements. Specific instructions for posi
-
tioning and installing the Encompass 4 Reader are discussed in Chapter 4, ”Installing
the Encompass 4 Reader”
Junction Box
Use a watertight junction box that meets applicable local and national building codes
for connecting power and communications wiring. The junction box houses the termi
-
nal strip for power and communications connections. TransCore recommends a
NEMA Type-4 junction box with a back mounting panel.
Power and Communications Cables
Cable length for power and communications depends on the physical characteristics
of the Encompass 4 Reader installation site.
Table 2-2 lists accessory kits available for
cabling options based on your site’s requirements.
Table 2-2 Connector Cabling Accessory Kits
Part Number Description
58-1620-001 5-ft connector cable harness
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