Emerson Micro Motion 5700 Configuration And Use Manual page 280

Using ProLink III with the transmitter
June 2019
Figure B-3: 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)
3. To connect to a point in the local HART loop:
a) Attach the leads from the signal converter to any point in the loop, ensuring that the leads are
across the resistor.
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.
280
(including barrier)
max
Configuration and Use Manual
Micro Motion 5700 Transmitters with Intrinsically Safe Outputs
MMI-20039472