Emerson Micro Motion 5700 Installation Manual page 25

Installation Manual
MMI-20039473
Figure 4-1: Channel A mA/HART supply voltage and loop resistance
A. Total loop resistance R
B. Supply voltage VDC (volts)
C. Operating region with HART
D. Operating region without HART (includes the C range)
Note
Rmax = (Vsupply - 8) / 0.024
For HART Rmin = 250 Ω
mA output is linear with process from 3.8 to 20.5 mA, per NAMUR NE-43 (February
2003)
Channel B or C terminal requirements
Use the chart below to determine the required supply voltage for Channel B or C based on
loop resistance.
Installation Manual
(including barrier)
max
Wiring the channels
May 2019
25