Installation Instructions
TRNM[G]4-6-60[-X]
SW3-1016- v1
1. Introduction
This document is a guideline for installation of the TRNM[G]4 range of transit antennas onto a vehicle roof and should be used as guidance in the context
of a well-planned installation.
This document provides best practice guidance, but it should be noted that the requirements of a specific installation may differ.
If in any doubt, advice should be sought from an installation expert or the vehicle manufacturer.
2. Important Safety Considerations
Failure to carry out an adequate risk assessments, to follow relevant laws, specifications, and best practice, and to
plan installations with expert advice in respect of the matters below may increase the possibility of death, serious
injury or damage to property.
Panorama strongly recommends mounting the antenna using appropriate stainless steel M12 cap head bolts, nuts
and washers sealed with the supplied M12 bonded sealing washers tightened to a torque of 10Nm (7.4 ft/lbs). The
central M33 nut should be tightened to a torque of 80Nm (59 ft/lbs). Do not over or under tighten.
Some versions of this product include an active GPS/GNSS antenna.
Rated voltage L1 Only: 3-5VDC Rated current: 20mA maximum.
The supply to this device must be provided with over-current protection of 1A maximum.
2.1 Earthing / Grounding
The radiating elements in the antenna are DC grounded,to provide a "shunt path" to earth/vehicle chassis in the event of contact with high voltage.
In many installation scenarios (e.g. where overhead catenary lines are present), to provide the high voltage "shunt path", it is crucial to ensure that there is
low resistance contact between the antenna and the body of the vehicle. After the roof is prepared for installation, the conductivity in the contact areas
with the antenna should always be checked using a milliohm meter. In order to ensure that low resistance contact is maintained during the service life of
the antenna, it is important that appropriate corrosion resistant mounting hardware (e.g. bolts,washers and other ancillaries) are used.
Where the antenna is to be fitted to a non-conductive panel, a suitable conductive mounting plate and earthing cable or similar should be fabricated in
order to provide effective earthing contact. Recommended panel thickness would be >12mm (0.5") for aluminium and >8mm (5/16") for Steel.
It is recommended that the GPS/GNSS feed is protected with an in-line surge arrestor installed in accordance with the manufacturer's instructions - the
arrestor device must provide a DC path to enable phantom power feed to the GPS/GNSS LNA .
It is extremely important that any measure taken to seal the mounting bolts does not impact upon the earthing connection that they provide between the
vehicle body and the antenna.
EN
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