Emerson Rosemount 644 with HART Protocol User Manual

Reference Manual
00809-0200-4728, Rev SA
Operation and Maintenance
July 2018
55
Operation and Maintenance
Section 4 Electrical Installation
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 55
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 55
Wiring and powering the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 55
4.1 Overview
The information in this section covers installation considerations for the Rosemount
™
644 Temperature
Transmitter. A Quick Start Guide is shipped with every transmitter to describe mounting, wiring, and
basic hardware installation procedures for initial installation.
4.2 Safety messages
Instructions and procedures in this section may require special precautions to ensure the safety of the
personnel performing the operations. Information that potentially raises safety issues is indicated by a
warning symbol ( ). Refer to the following safety messages before performing an operation preceded
by this symbol.
4.3 Wiring and powering the transmitter
All power to the transmitter is supplied over the signal wiring. Use ordinary copper wire of sufficient size
to ensure the voltage across the transmitter power terminals does not drop below 12.0 Vdc.
If the sensor is installed in a high-voltage environment and a fault condition or installation error occurs,
the sensor leads and transmitter terminals could carry lethal voltages. Use extreme caution when
making contact with the leads and terminals.
Explosions could result in death or serious injury.
 Installation of this transmitter in an explosive environment must be in accordance with the
appropriate local, national, and international standards, codes, and practices. Review the approvals
section of the this manual for any restrictions associated with a safe installation.
 In an Explosion-Proof/Flameproof installation, do not remove the transmitter covers when power is
applied to the unit.
Process leaks may cause harm or result in death.
Install and tighten process connectors before applying pressure.
Electrical shock can result in death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads can cause
electrical shock.

Emerson Rosemount 644 with HART Protocol Specifications

General

Brand	Emerson
Model	Rosemount 644 with HART Protocol
Category	Transmitter
Language	English