Digital BUS-WATCH
®
HDx00
Page 30 of 93
Radio Engineering Industries, Inc.
640430 -- Rev A -- 9/7/2012
Accelerometer Module Harness
ACCELEROMETER MODULE
710143
ACC
VIEW
REAR
ACC
POWER
J1939
INPUTS
CAMERAS
1
5
PANIC
4
3
2
GPS
USB
NET
8
7
AUX
6
ANT1
ANT2
710331
BUS-WATCH DVR, HD800
Figure 15: Accelerometer Module Harness Connection
The optional external Accelerometer, or Inertia Sensor, must be hard mounted to
the vehicle floor, frame, or some other non-dampened part of the vehicle. The reason for
this is so that if external dampening is used for the DVR, it will not throw off the
Accelerometer readings.
To properly install the Accelerometer Module, the user must align the device with
the picture on top of the module as shown in Figure 16 below. The X axis is drawn from
the back to the front of the bus, the Y axis is drawn from the side of the bus to the other
side of the bus, and the Z axis is drawn from the bottom to the top of the bus. The
Accelerometer Module then needs to be calibrated.
Figure 16: 3 Axis Inertia Sensor Directions
