Airbus TW1m, Инструкция по эксплуатации

Страница: 22 / 28

I N S T A L L A T I O N
PS11730AENAD01 TW1m - Instruction Manual
22/27
This document is the property of Airbus DS SLC and should not be copied or circulated without permission.
If the vehicle has a +24 V electrical system (trucks, all-terrain vehicles, etc), an external voltage converter must be
used. The converter must be well protected against transients produced by the vehicle's electrical system. It must
also be capable of maintaining a stable output during the rapid changes in the load current. Some vehicles have a
main switch (for instance the gas trucks) that separates the chassis of the vehicle from the negative lead of the
battery. Never pass this switch, that is, the grounding of the reducer must be taken from the body of the vehicle,
NOT directly from the battery.
Lightning protection
Protect the antennas in particular from lightning by using lightning rods, surge arrestors, gas discharge tubes and/or
other methods. As the installation and climatic conditions vary, the customer is always responsible for the lightning
protection of the final installation.

Grounding
The TW1m modem has been designed for negative ground systems. If you install the TW1m modem in a system
with positive ground, take a special care to ensure that the grounding and supply voltages are correctly connected.
All the input and output signal voltages in this document are always referred to the GND pins of the connector.
Always connect the power connector GND first and last. Antenna GND needs to be always galvanically connected
to the power GND.