Parker PHD28, User Manual, Page: 24 / 157

16 PHD
Inputs
3.
Position the sensor’s ground connection near the system ground connections
to ensure that the signal remains within the digital activation range of the
input.
Note 1: The system ground inputs are rated for low-current signals, which
ensures the sensor's ground is very close in voltage potential to the system
ground.
Note 2: Sensors that don’t have a dedicated ground wire are typically
grounded to the vehicle chassis through the sensor’s body.
Internal to product
Sensor Power
Resistive Sensor
Pull-up
Resistor
Active Sensor
Analog Input
Analog Input
Figure 7: Analog input ground shift connection for sensors that have dedicated ground wires