Installation Manual
16 17
INSTALLATION
CONNECTOR PINOUT
Pin # Signal Color
1 +30 Red
2 +15 Orange
3 In0 Brown
4 In2 Pink
5 CAN1_L Green
6 CAN2_L Red/Green
7 Out0_LS Red/Black
8 Out2_LS White/Black
9 RS232_Out Violet
LTE Diversity
GNSS
LTE
INSTALLATION
NOTICE - The wiring schematics are noted as recommendations by Tierra, please
consult your equipment manufacturers operation manuals for specic information
pertaining to wiring or use of the equipment’s battery as a power source.
WARNING - Before welding steel parts on the frame, disconnect the AM35 device as
hardware issues may occur.
WARNING - Do not apply external force on the harness and allow the cables to be
tension-free.
WARNING - The switched power wire (orange) should be connected to a source that is
only energized during the engine run cycle.
DO NOT CONNECT RED AND ORANGE WIRES TOGETHER.
If red and orange wires are connected to the same signal source, the Key OFF event
is not detected or reported and the device rmware will not function properly. This
connection can be sourced at the output run terminal of your vehicle’s alternator or other
sources that are only “hot” when the engine is running (mechanical hour meter, etc.). Use
a multimeter to verify that 9 to 36 volts are present only when the engine is ON. For both
switched power (orange) and constant power (red), the voltage range is the same.
CAUTION - Wiring a piece of heavy equipment up without using the above‐mentioned
method causes problems with inaccurate hours being reported into Tierra web. These
hours will not match the hour meter on the machine, thereby causing erroneous readings
due to the presence of a switched power signal when the engine is not running. This
could occur if wired to the ignition when the key switch is left ON. Due to the inability
to detect Key OFF, connecting red and orange to the same signal source is never
acceptable. IN ALL CASES, switched power wired to an engine run signal is the rst and
best practice.
NOTICE - Some vehicles, such as tractors or agricultural machines, have 3‐pin connectors
with ground, battery power, and switched power located inside the cabin. You can use
this connector to power an AM35 device. Both constant power and switched power need
to be fuse‐protected (5A fuse works ne). Install a 5A fuse onto the battery power cable
and another fuse onto the switched power cable if the circuit is not protected.
NOTICE - Use Ty‐wraps to keep hoses and wires secured to avoid possible wear
or pinch points.
NOTICE - Both switched power AND constant power MUST BE used to properly
power up the box.
Pin # Signal Color
10 GND Black
11 Chassis Grey
12 In1 Turquise
13 In3 Blue
14 CAN1_H Yellow
15 CAN2_H Red/Yellow
16 Out1_HS White/Red
17 Out3_HS White/Green
18 RS232_in White