Emerson Rosemount 644, Reference Manual

Page: 20 / 182

10
Reference Manual
00809-0200-4728, Rev RA
Section 2: Configuration
April 2015
Configuration
Figure 2-1. Powering the Transmitter for Bench Configuration
A. Power Supply
B. Field Communicator
Note

Signal loop may be grounded at any point or left ungrounded.

A Field Communicator may be connected at any termination point in the signal loop.
The signal loop must have between 250 and 1100 ohms load for communications.

Max torque is 6 in.-lbs (0.7 N-m)
2.4.2 Choosing a configuration tool
Configuring with a Field Communicator
The Field Communicator is a hand-held device that exchanges information with the transmitter
from the control room, the instrument site, or any wiring termination point in the loop. To
facilitate communication, connect the Field Communicator, shown in this manual, in parallel
with the transmitter (see
Figure 2-1 ). Use the loop connection ports on the rear panel of the
Field Communicator. The connections are non-polarized. Do not make connections to the serial
port or the Ni-Cad recharger jack in explosive atmospheres. Before connecting the Field
Communicator in an explosive atmosphere make sure the instruments in the loop are installed
in accordance with intrinsically safe or non-incendive field wiring practices.
There are two interfaces available with the Field Communicator: Traditional and Dashboard
interfaces. All steps using a Field Communicator will be using Dashboard interfaces.
Figure 2-2
shows the Device Dashboard interface. As stated in “System readiness” on page 8 , it is critical
that the latest DD’s are loaded into the Field Communicator for optimal transmitter
performance.
Visit www.emersonprocess.com to download latest DD library.
Turn on the Field Communicator by pressing the ON/OFF key. The Field Communicator will
search for a HART-compatible device and indicate when the connection is made. If the Field
Communicator fails to connect, it indicates that no device was found. If this occurs, refer to
Section 6: Troubleshooting .
644 Head Mount and Field Mount 644 Rail Mount
B
250
Ω ≤
R
L
≤
1100
Ω
A