C.2 Connect with the Field Communicator
A connection from the Field Communicator to your transmitter allows you to read process data, configure the
transmitter, and perform maintenance and troubleshooting tasks.
Prerequisites
The following HART device description (DD) must be installed on the Field Communicator :
5700 Dev v1 DD V1 or later.
You can connect the Field Communicator to the primary mA terminals on the transmitter, to the HART
connection posts on the transmitter, to any point in a local HART loop, or to any point in a HART multidrop
network.
CAUTION
If the transmitter is in a hazardous area, do not remove the housing cover while power is being supplied to
the unit. Removing the housing cover while power is supplied to the unit could cause an explosion. To
access transmitter information in a hazardous environment, use a communication method that does not
require removing the transmitter housing cover.
Important
If the HART security switch is set to
ON
, HART protocol cannot be used to perform any action that requires
writing to the transmitter. For example, you cannot change the configuration, reset totalizers, or perform
calibration using the Field Communicator with a HART connection. When the HART security switch is set to
OFF
, no functions are disabled.
Procedure
1. To connect to the transmitter terminals or to the HART connection posts:
a) Remove the transmitter end-cap.
b) Attach the leads from the Field Communicator to terminals 1 and 2 on the transmitter, or to the
HART connection posts, and add resistance as required.
The Field Communicator must be connected across a resistance of 250–600 Ω.
Tip
HART connections are not polarity-sensitive. It does not matter which lead you attach to which
terminal.
Using a Field Communicator with the transmitter
Configuration and Use Manual
March 2019
MMI-20025166
334
Micro Motion Model 5700 Transmitters with Configurable Outputs