Application Settings - Pepperl+Fuchs WHA-ADP Series Manual

WHA-ADP-*
Configuration
5.7

Application Settings

5.7.1 4-20 mA
When a HART device is connected to the adapter, all parameters are read via the digital
signal. It is possible, however, to connect a 4 ... 20 mA device to the adapter. In this case
the 4 ... 20 mA signal can be scaled as desired in the DTM and a linearization can be made
if necessary. In addition, current values can be set which correspond to the limits of the
proportional range and the fault signal of the device. Should these current limits be
violated, an appropriate warning or alarm signal is transmitted by the adapter.
Figure 5.8: 4-20 mA parameters
Device variable mapping
Parameter
Primary Variable
Unit
Linearization
Mode
Description
The unit of the primary variable supplied by the 4 ... 20 mA
device. The selection changes the units of the scaling
parameters.
Determines how the current input will be converted to the
output.
• Linear: Proportional scaling across the set range
• Special curve: Scaling according to the table in
Linearization
Default
mA
Linear
53