Honeywell TARS Installation Instructions Manual

Installation Instructions for the

Transportation Attitude Reference Sensor
TARS Series

1.0 GENERAL INFORMATION

Honeywell’s Transportation Attitude Reference Sensor (TARS)
Interial Measurement Unit (IMU) is designed to provide motion
sensing through 6 degrees of freedom and reporting of
angular rate, acceleration, and inclination data through a CAN
J1939 interface. It is packaged for harsh environments and
demanding applications.

2.0 CALIBRATION

TARS-IMU devices are aligned to a flat surface and calibrated
on an aerospace-grade rate table providing consistency
between units and eliminating the customer’s need to calibrate
the IMU.

3.0 INSTALLATION

Mount the sensor using the three mounting holes and three
non-magnetic, stainless-steel socket head cap screws, M8 or
equivalent. Torque to 20 Nm ±2 Nm.

• Mating connector: AMPSEAL 16 Series, 776487-1 for 18-16
AWG conductors or 776524-1 for 20-18 AWG conductors

• Mounting direction: +Z

Issue A

32332897

Sensing and Internet of Things

Transportation Attitude Reference Sensor

ISSUE A

32332897

(TARS Series)

4.0 SPECIFICATIONS

Table 1. Sensor Specifications

Characteristic Min. Typ. Max. Unit

Gyroscope 3 axis performance

Angular rate range -245 – +245 deg/sec

Angular rate resolution – 7.8125 – mdps

In-run bias stability – 1 – mdps

Rate noise density – 0.004 – deg/sec/sqrt Hz

Offset (0 °C to 50 °C) -0.8 – +0.8 deg/sec

Offset (-40 °C to 85 °C) -1.6 – +1.6 deg/sec

Accelerometer 3 axis performance

Acceleration range -78.48 – +78.48 m/s

Acceleration resolution – 0.01 – m/s

In-run bias stability – 50 – mg

Acceleration noise density – 65 – mg/sqrt Hz

Offset (0 °C to 50 °C) – ±0.05 – m/s

Offset (-40 °C to 85 °C) – ±0.15 – m/s

Inclination (pitch and roll) performance

Range (2 axis x & y) -85 – +85 deg

Resolution – 0.058 – deg

Static inclination error
(0 °C to 50 °C)

Static inclination error
(-40 °C to 85 °C)

Translational acceleration error – ±0.5 – deg

Centripetal acceleration error – ±0.5 – deg

Settling time –  2000 mSec

– ±0.3 – deg

– ±0.9 – deg

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Table 2. Electrical Characteristics • TARS-LCASS

Characteristic Min. Nominal Max. Unit

Supply voltage 4.5 5 5.5 V

Supply current – – 100 mA

Start-up time 500 – 2000 mSec

Short circuit protection CAN output shorted to power line and ground

Open circuit protection Single-line interruption and multiple-line interruption

Reset response Automatic after voltage drop

CAN output characteristics per SAE J1939

CAN Bus data rate – 250 – kBaud

Signal update rate – – 100 Hz

2 sensing.honeywell.com

Transportation Attitude Reference Sensor

ISSUE A

32332897

(TARS Series)

Table 3. Electrical Characteristics • TARS-HCASS

Characteristic Min. Nominal Max. Unit

Supply voltage 9 14/28 36 V

Supply current – – 100 mA

Reverse voltage – – -36 V

Overvoltage – – 36 V

Start-up time 500 – 2000 mSec

Short circuit protection CAN output shorted to power line and ground

Open circuit protection Single-line interruption and multiple-line interruption

Reset response Automatic after voltage drop

CAN output characteristics per SAE J1939

CAN Bus data rate – 250 – kBaud

Signal update rate – – 100 Hz

Table 4. Environmental Specifications

Characteristic Parameter

Operating temperature -40 °C to 85 °C [40 °F to 185 °F]

Storage temperature -40 °C to 105 °C [40 °F to 221 °F]

Random vibration

Mechanical shock 50 g 11 mS half-sine, 3 each direction, 18 total, pulse per MIL-STD-202, Method 213

Chemical compatibility

Moisture resistance per MIL-STD-202, Method 106 (10 cycles, 24 hours/cycle)

Thermal shock 250 cycles, -40 °C to 85 °C, 73 min dwells

Salt spray 5 % salt solution, 96 hours

Ingress protection IP67, IP69K (DIN40050-1993) with mating connector installed

RoHS Compliant

REACH Compliant

UV rating Enclosure material meets outdoor suitability requirements per UL746C F1 rating

8 hours per axis at 16.91 g RMS
per MIL-STD-202, Method 214, Test Condition I, Letter E

Diesel fuel, hydraulic oil, ethylene glycol, motor oil, brake fluid, urea nitrogen, liquid lime,
NPK fertilizer, ammonium hydroxide, alkaline degreaser, transmission oil, power steering
fluid, and axle oil

Table 5. EMC Specifications

Characteristic Stndard Test Level, Frequency

Radiated immunity ISO 11452-2 125 V/m, 400 MHz to 2.5 GHz

Bulk current injection ISO 11452-4: 2011 125 mA, 1 MHz to 400 MHz

Radiated emission ISO 13766 30 MHz to 1 GHz

Mutual coupling ISO 7637-3 Test pulse A, Test pulse B (-80 V, 80 V)

ESD direct contact discharge ISO 10605 ±8 kV

ESD air discharge ISO 10605 ±15 kV

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