Emerson Micro Motion 5700 Configuration And Use Manual page 282

Using ProLink III with the transmitter
June 2019
Figure B-5: Channel A mA/HART supply voltage and loop resistance
A. Total loop resistance R
B. Supply voltage VDC (volts)
C. Operating region with HART
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)
4. To connect over a HART multidrop network:
a) Attach the leads from the signal converter to any point on the network.
b) Add resistance as necessary to achieve at least one volt across the connection points.
Important
HART/Bell 202 connections require a voltage drop of 1 VDC. To achieve this, add resistance of
250–600 Ω to the connection.
282
(including barrier)
max
Configuration and Use Manual
Micro Motion 5700 Transmitters with Intrinsically Safe Outputs
MMI-20039472