120 20120-211
Gemini
PD+
Installation Guide
8
4.
Carefully route both the B and the C wires to where the in-line fuse holder will be installed, usually as
close to the vehicle’s battery as practicable. Ensure that leads do not chafe on any metal part(s). Se-
cure the wires at several locations along their length.
Caution:
Use proper crimping tool. Common pliers are NOT acceptable.
Warning:
The DC Power lead must be unswitched. For “NMS / Mobile Diagnostics” users, this is manda-
tory to let the unit save its radio diagnostics and statistics at shutdown time. Turning the unit
OFF by switching the main DC power input instead of the ignition-sense results in radio diag-
nostics/statistics becoming corrupted or totally lost during power-down / power-up cycles
5.
Insert the negative (blue) lead into one of the appropriate connector lug and crimp solidly.
6.
Repeat the step above for the red DC power lead.
7.
Attach the positive lead at the battery positive terminal. Attach the negative wire at the vehicle end of
the battery ground cable.
If the negative cable is connected directly to the battery negative terminal, it should be fused
in case of failure of the vehicle’s ground cable.
Ensure tight and secure connections.
8.
Fasten the fuse holder and leads.
9.
Carefully route the “A” wire to where the connection will be made for switch sensing. Depending on
your network requirements, select the relevant option from the four listed below.
a)
Connect to “Ignition” to have the Gemini
PD+
unit turn ON and OFF dependent on the vehicle’s
ignition key.
b)
Connect to “Accessory” if you wish the Gemini
PD+
unit to operate when the engine is not running,
but still dependent on the ignition key.
c)
Connect to a user-supplied control switch.
d)
In installations equipped with a “ChargeGuard”, connect only the switch-sense “A” lead to the
controlled-side of the ChargeGuard. The DC Power lead must NOT be switched.
10.
Make appropriate connections.
Cautions:
Where scraping to bare metal was required, and at the battery posts where wire ends and lugs
may be exposed, apply anti-corrosion compound.
Insert the fuse only when installation is complete and ready to test
.
11.
At the Gemini
PD+
radiomodem position, neatly coil cable slack and attach securely.
2.5 Antenna
The main transmitter antenna must be vehicle-mounted to provide a separation distance of 50 cm or more
from all persons and the
antenna gain
must not exceed 5dBi (with a 1.6dB cable loss).
2.5.1 Recommended tools and supplies
•
circle cutter, hole saw or socket punch for antenna
•
Mini-UHF Crimp tool Planning
PD+
radiomodems commonly uses three separate antennas:
