Innovate Motorsports DL-32 - Manual (Page 14)

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Input 4 Functions
Function
Indicator 1 2 3 4 F d =
Functionality MAP (1
bar)
(0..101.3
kPa)
MAP (3
bar)
(0..304.1
kPa) Vacuum
(0..30
inHg
Vacc) Vacuum/Boostt
(-14.7PSI…
29.4 PSI) Frequency
(straight
frequency,
Speed
sensor,
Custom
RPM range Duty
Cycle External
0..5V
sensors
Input 5 Functions
Function
Indicator 1 2 3 F d =
Functionality Acceleration
(+- 2g)
Acceleration
(+- 1g) Acceleration
(+- 0.25g) Frequency
(straight
frequency,
Speed
sensor,
Custom
RPM
range Duty Cycle External
0..5V
sensors
The DL-32 also can act as a power supply for user supplied external sensors. The 5V output of
the DL-32 can supply up to 300mA of current. For this functionality the DL-32 converts the 12V to
5V to power the sensors.
6.2 Differential Inputs
The DL-32’s external connections are differential. This means that each input channel has 2 input
terminals. A + terminal and a – terminal. This is to eliminate ground offsets in the signal. Many
times the ground point of a sensor is at a different ground than the DL-32. Because each
electronic device can only measure a voltage referenced to it’s own ground, differences in
grounding can introduce measurement errors. The DL-32 measures the sensor signal’s ground
with the – input and them measures the difference between the + and the – input. This way it
“recreates” the sensor signal’s own ground reference as if this input were referenced directly to
that sensor’s ground.
The – input is NOT a ground itself. It is a ground reference input.
6.3 Input signal requirements
The DL-32 can record either analog signals or pulsed signals. Analog signals are measurements
where the information (for example a pressure) is converted by a sensor to a voltage output
between 0 and 5V.