Installation Guide

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LMU-303x Hardware & Installation Guide

Input 3: Vbatt Low
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Input 4: Vin Active (On LMU-303x use Input 4 for Ignition Input Wake Up Monitor instead of Input
0)
Analog to Digital Inputs

A/D 0: Vin

A/D 1: uP Temp

A/D 2: Vref

A/D 3: Battery

A/D 4: Impact
Outputs
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Output 4: Power Supply Switch (cleared = switch to external power, set = switch to internal
power)

Output 5: Enable/Disable Battery charging (cleared = enable battery charging, set =
disable battery charging)
3.3.1 3-Axis Accelerometer + 3-Axis Gyroscope
The LMU-303x™ supports an internal 3 Axis Precision Accelerometer as one of its discreet inputs. When the
LMU is moved in any direction, the associated input will be in the High state. If the LMU’s accelerometer does
not detect motion, then the input will be in the Low state. No external connections are required for this
functionality to be operational.
Accelerometer Gyroscope
Acquisition rate: >1600Hz Acquisition rate: >1600Hz
Sampling rate - output data rate: 100, 200, 400 Hz Sampling rate - output data rate: 100, 200, 400 Hz
Resolution: <= 0.01G Resolution: <= 0.01G
Full Scale: 15-24G Full Scale: 15-24G