Figure B-9: Externally powered mA output: maximum loop resistance
0
100
200
300
400
500
600
700
800
900
1000
1100
0
7.5
15.0
22.5
30.0
B
A
A. Maximum resistance (Ω)
B. External supply voltage (V)
Note
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.
Configuration and Use Manual
Using ProLink III with the transmitter
MMI-20025166
March 2019
Configuration and Use Manual
329