VBOX 3i User Guide
Page 16 of 46
28/08/2013
Analogue and Digital outputs (AD1 & AD2)
The AD1 and AD2 connectors each have 1 analogue voltage and 1 digital output. The digital output on connector AD2 is a frequency/pulse output corresponding to
velocity. The pulse per meter range is adjustable in software. The digital output on connector AD1 is a simple on/off state output. This digital output can be
associated with any of the data channels being logged by the VBOX. A threshold level can be set for the selected data channel where a true condition gives a 5v
output and a false condition gives a 0v.
i.e. Data channel
–Speed, threshold 40Km/h. When speed is >40 output = 5V, speed , 40 output = 0V
A hysteresis and tolerance value can also be associated to this condition.
The default function of this digital output is to indicate the current logging status of the VBOX.
The analogue outputs on connectors AD1 and AD2 are both user configurable. For example, analogue output 1 could be configured to output velocity while
analogue output 2 might be configured to output lateral acceleration. The voltage range of both analogue outputs is 0 to 5v DC.
