Make A Hart/Bell 202 Connection From Prolink Iii To The Transmitter - Emerson Micro Motion 5700 Configuration And Use Manual

Configuration and Use Manual
MMI-20025166
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If an error message appears:
• Verify the HART address of the transmitter, or poll HART addresses 1–15.
• When the transmitter is in a fault, you may need to add additional resistance in the loop to achieve
HART communications.
• Ensure that you have specified the correct port on your PC.
• Check the wiring between the PC and the transmitter.
• Ensure that there is no conflict with another HART master. If any other host (DCS or PLC) is
connected to the mA output, temporarily disconnect the DCS or PLC wiring.
• For long-distance communication, or if noise from an external source interferes with the signal,
install 120-Ω ½-W terminating resistors in parallel with the output at both ends of the
communication segment.
B.2.5 Make a HART/Bell 202 connection from ProLink III to the
transmitter
This connection type uses HART protocol and commands to communicate with the transmitter over a
Bell 202 physical layer. You can connect directly to the Channel A terminals on the transmitter, to any point in
a local HART loop, or to any point in a HART multidrop network.
Prerequisites
• Channel A activated on the transmitter
• Installation kit
Procedure
1. Attach the signal converter to the serial port or USB port on your PC.
2. To connect directly to the transmitter terminals:
a) Open the transmitter wiring compartment.
CAUTION
If the transmitter is in a hazardous area, do not open the wiring compartment while the
transmitter is powered up. Opening the wiring compartment while the transmitter is
powered up could cause an explosion. To connect to the transmitter in a hazardous
environment, use a connection method that does not require opening the wiring
compartment.
b) Connect the leads from the signal converter to terminals 1 and 2 on the transmitter, or to the
HART connection posts.
Tip
HART connections are not polarity-sensitive. It does not matter which lead you attach to which
terminal.
c) Add resistance as necessary to achieve at least one volt across the connection points.
Configuration and Use Manual
Using ProLink III with the transmitter
March 2019
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