T02-00025-1002/3/4/5 GPS Receivers
Installation Instructions
402-00121Issue 03 - November 2021
Tait International Ltd
Introduction
The T02-00025-1002, T02-00025-1003, T02-00025-1004 and T02-00025-
1005 are high performance, 32-channel (simultaneous) GPS receivers that
operate at a frequency of 1575.42MHz (±10MHz). See the following table for
information on each GPS receiver:
Product Code
Style
Ignition Sense Feature
T02-00025-1002
Magnetic mount, IP67
rated housing.
Yes
T02-00025-1003
Through hole mount.
IP69K rated housing
Yes
T02-00025-1004
Magnetic Mount. IP67
rated housing.
No
T02-00025-1005
Through hole mount.
IP69K rated housing
No
All of the GPS units have an integrated 5 meter cable (16 ft) terminated in an
RJ type connector. Each unit comes supplied with a short adaptor cable to
facilitate the connection to the Tait Mobile Radio AUX port (DB15).
Ignition Sense Feature
For the T02-00025-1002/3 units, the included adaptor cable supports ignition
sense and includes a 30cm (12 inch) yellow wire for connection to the
vehicle’s ignition signal.
A companion kit: T02-00026-5001 (not pictured), facilitates the extension of
the ignition sense wire from 30 cms up to 4 meters (13 ft). The kit includes a
3A fuse, a fuse holder, and the required crimp receptacles.
Installation Precautions
When mounting the GPS receiver inside a vehicle, ensure it is mounted
securely. Unsecured equipment is dangerous to the vehicle occupants.
When drilling holes in a vehicle, check that drilling at the selected points
will not damage existing wiring, fuel tanks, fuel lines, brake pipes or
battery cables.
GPS accuracy may be influenced by close radiation sources (such as
transmitting radio antennas). This must be taken into consideration when
choosing the mounting location of the GPS antenna and cabling. If unsure,
please contact your radio provider.
The radio does not meet the IP54 protection standard once the bung for the
auxiliary connector is removed. Therefore, once the GPS Receiver is
installed, mount the radio in areas where it is not exposed to water, dust or
other environmental hazards.
GPS Receiver Installation
1. Drill any holes required for the cables and install suitable grommets
or bushings in the holes.
2. Run the adapter cable to the radio and plug it into the 15-way aux-
iliary connector.
3. Position the GPS receiver where it has unimpeded exposure to the
sky, eg. on the roof of the vehicle or on the rear parcel tray in the
vehicle.
4. For the magnetic mounted T02-00025-1002/4, optimum per-
formance is achieved with a 10 cm (4 inch) radius metallic ground
plane. If a metallic ground plane is not available, the GPS antenna is
sensitive enough to operate without one.
5.
Additional steps for T02-00025-1003/5 installation only:
The through-hole mounted T02-00025-1003/5 will provide good ser-
vice on any roof surface type (metallic or fiberglass/plastic), but
best results are obtained when it is installed on a metal roof.
l
Drill a 19mm (3/4 inch) diameter hole through the mount-
ing surface for the T02-00025-1003/5, which should be no
thicker than 6.4mm (0.25 inch).
l
Remove the two nuts and the washer from the GPS
receiver and pass the cable through the hole.
l
The rubber ring at the bottom of the GPS receiver does
provide a seal against the mounting surface, but make sure
that the outside of the mounting surface is smooth, flat and
free of corrosion, flaking, and debris. Pass the cable
through the washer and two nuts and secure the GPS
receiver to the mounting surface.
6. Run the GPS receiver cable to the radio adapter cable, and connect
using the RJ connection.
7. For the T02-00025-1002/3 models, see "Ignition Sense Installation
(T02-00025-1002/3)" below
8. Tie up any unused cables.
Programming Radios
The programming application Help provides support for programming the
radio for use with the GPS receiver. Talk to your radio provider for inform-
ation on GPS and AVL.
Ignition Sense Installation
(T02-00025-1002/3)
The ignition signal can be used to power up and power down the radio. This
will turn the radio off when the ignition key is off to avoid flattening the battery.
This will turn the radio on or return it to its previous state (as programmed)
when the ignition key is on.
If the T02-00026-5001 companion kit (see "Ignition Sense Feature" above) is
not used, please observe the following guidelines:
1. Ensure that a suitably rated extension wire is reliably connected to
the flying lead with environmental sealing appropriate for the work-
ing conditions.
2. In order to protect the ignition sense wire in case of excessive fault
current, an appropriately rated fuse-holder/fuse must be incor-
porated into the wire and positioned as close to the ignition/acc sig-
nal as possible.
3. Do not install the fuse into the fuse holder until the installation is
ready to be tested.
If a T02-00025-1002/3 GPS receiver is being incorporated into an existing
installation which is already using ignition sense, e.g. a T03-00034-EAAA is
fitted, the original ignition sense kit must be removed and replaced by the
T02-00025-1002/3 adaptor cable ignition sense.
If the ignition sense feature of the T02-00025-1002/3 is not used, i.e. the
adaptor cable wire is left unconnected, the radio power-on behavior will
change. For example, if the radio is disconnected from power, the radio
will always stay off when power is re-applied. The radio can only be
turned on with the on/off button. To allow the radio to turn on whenever
power is applied, connect the ignition sense wire directly to the radio's pos-
itive power lead. The following table summarizes 'power-on' behavior in
relation to the yellow wire connection.
Yellow Wire
Connection
Radio Power-on
a
Floating (not con-
nected)
Via front panel on/off button only
Ignition signal
Via ignition signal or front panel on/off but-
ton
Radio Ve
When radio power is applied or via front
panel on/off button
Radio Hardware Configuration for Ignition
Sense
The radio hardware link LK2M (on the top-side of the main board) must be fit-
ted for ignition sense operation.
LK2M is typically factory fit-
ted by default
.
a
Assumes radio hardware link LK2M is fitted. See section
below.
