Parker PHD Series User Manual

16 PHD
Inputs
3.3.1. PHD28/PHD50 analog input capabilities
The PHD28 and PHD50 have analog inputs. These inputs are also configurable as
digital inputs.
Analog inputs are useful for reading potentiometers and Hall Effect signals.
The following table provides specifications for the analog inputs:
Analog Input Specifications
Item
Min
Nom
Max
Unit
Input voltage range
0
5
V
Input pin capacitance
10
µF
Pull-down resistance
26.2
k
Response to step change
50
ms
Over-voltage
36
V
Resolution - 10 bit
5
mV
Offset error
11
mV
Accuracy
3
%
3.3.1.1. Analog input connections
Analog inputs are susceptible to system noise, which can affect the accuracy of
the signal. Signal accuracy can also be affected by ground level shift, which can
cause inputs to activate when they shouldn't.
System noise
To prevent noise pickup on the sensors,
▪ Use the shortest possible wires when connecting analog inputs to sensors.

Parker PHD Series Specifications

General

Brand	Parker
Model	PHD Series
Category	Control Unit
Language	English