GE MobileView 4, Installation Manual

Page: 88 / 106

MobileView 4
Installation Manual
78
Analog inputs
The MobileView DVR lets you monitor four analog signal inputs. Analog inputs are
generally used to measure such things as pressure, temperature, and velocity. These
variables are commonly available on heavy-duty vehicles. Once these variables are
converted to electrical inputs in the ranges of 0 to 5 V, 0 to10 V, or 0 to 30 V, the DVR can
monitor and act upon these variable signals.
The top left corner of the real-time inputs screen provides the digital value between 1 and
255 of each analog input. The digital value is necessary to create an event based on an
analog input.
To determine digital values settings for analog input conditions, do the following:
1. Set the Voltage Range radio button to match the analog input jumper on the back
box for the input under evaluation ( Figure 61 ).
2. Change the state of the analog input to the condition under evaluation.
3. Record the input value at that condition.
4. Repeat steps 2 and 3 for each condition.
5. Repeat steps 1 through 4 for each input.
Figure 61. Analog and digital inputs
Voltages and temperatures
Key input and output voltages are shown here. One critical monitor is input VIN. This
provides the input voltage to the DVR from the vehicle. The nominal voltage is 24 V.
Common regulated voltage from a running vehicle is approximately 27.5 V. Common
battery voltage from a stationary vehicle will vary between 22.5 and 24.5 V depending on
Analog and digital inputs
J13
5V 10
V
30
V
5V 10V 30V 5V 10V 30V 5V 10V 30V
A Cn1 A Cn2
A Cn3
A C
n4