User Guide
7
Inputs
2.1.2. Analog Input Configuration Options
All analog inputs are hardware configurable with an optional pull-up resistor to
+5V. The default configuration for all of the analog inputs has the resistor
populated.
2.1.3. Analog Input Installation Connections
The sensor supply along with the sensor ground are the recommended power feed
to external sensors. This will prevent system noise from affecting the analog input
signals.
Internal to product
+5 Vdc Sensor Supply
Sensor Ground
Sensor
Figure 2: Analog input system noise connection
Note:
It is important that the sensor supply does not connect to another
power source external to the DPS70. The sensor ground should also not
be connected to any other ground on the vehicle.
2.2. DPS70 Frequency Inputs
There is one type of frequency input in the DPS70:
▪
Direct coupled frequency input
Direct coupled frequency inputs are typically used to read pulse signals.
The DPS70 has 2 direct coupled frequency inputs:
▪
Frequency Input 1 to Frequency Input 2
