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GeminiG3 – 700MHz User Manual
8
Figure 2 - Bracket installation
5. Install the bracket without distorting
6. Securely mount GeminiG3 radiomodem
to the installed bracket using the four supplied 8x40 black
machine screws.
7. Drill any additional holes as required for routing all cables and fit holes with suitable grommets or
bushings whenever required.
2.4 Electrical
installation
2.4.1 Electrical
requirements
GeminiG3 radiomodem is designed to operate from a 13.8Vdc nominal car battery (negative ground) and
requires currents up to 12.0A. It will tolerate a supply voltage range of 10.9 volts to 16.3 volts.
In vehicles with a 24 VDC electrical system (mostly in trucks), it is essential to provide a suitably rated
24/12 VDC converter to isolate the unit from the battery and protect it against excessive voltage.
Warnings:
Always disconnect GeminiG3radiomodem’s DC power lead before connecting a second battery,
using power from another vehicle or power boosting (e.g. when “jump starting” the vehicle).
2.4.2 Routing of power cable
1. Start by disconnecting the vehicle’s battery unless specifically prohibited from doing so by the
customer, vehicle manufacturer, agent or supplier.
Note:
In this event, exercise extreme caution throughout the installation and fit the fuse only
when the installation is complete.
2. The 22 feet (6.7 meters) long power cable consists of three wires attached to a Packard Electric
“Weather-Pack” connector (DC power Connector, see Figure 3).
Figure 3 - DC Power Connector
The DC Power connector has:
•
At position “A”, the smaller red switch-sense wire (commonly to ignition)
•
At position “B”, the blue ground wire
•
At position “C”, a larger red B+ DC power wire (MUST be unswitched)
A
B
C
IGNITION
(Small red wire)
GROUND
(Blue wire)
13.8VDC B+
(Fused Red wire)
SEAL
(DO NOT REMOVE)
