Connection Over Local Loop - Emerson Micro Motion 5700 Configuration And Use Manual

Using ProLink III with the transmitter
March 2019
Figure B-8: Connection over local loop
A. PC
B. RS-232 to Bell 202 converter
C. Any combination of resistors R1 and R2 as necessary to meet HART communication resistance requirements
D. DCS or PLC
E. Transmitter with end-cap removed
F. External power supply, if required
Note
This figure shows a serial port connection. USB connections are also supported.
The signal converter must be connected across a resistance of 250–600 Ω. The mA output requires an
external power supply with a minimum of 250 Ω and 11 V. See the following figure to help determine
the appropriate combination of voltage and resistance. To meet the resistance requirements, you may
use any combination of resistors R1 and R2. Note that many PLCs have a built-in 250-Ω resistor. If the
PLC is powering the circuit, be sure to take this into consideration.
328 Micro Motion Model 5700 Transmitters with Configurable Outputs
Configuration and Use Manual
MMI-20025166