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Rosemount 3491 User Manual

Rosemount 3491
152 pages
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www.rosemount.com
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
Universal Control Unit

Table of Contents

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Rosemount 3491 Specifications

General IconGeneral
Product TypeControl Unit
Input Signal/Type4-20 mA, HART
Output Signal/Type4-20 mA, HART
Wireless ProtocolWirelessHART
Accuracy±0.1% of span
Communication ProtocolHART
Temperature Range-40 to 70°C (-40 to 158°F)
Enclosure RatingNEMA 4X, IP66
MountingWall or pipe mounting

Summary

Section 2 Overview

Control Unit Functions

Details standard, difference, sum, product, and logging functions of the control units.

Section 3 Installation

Electrical Connections

Covers electrical connections for wall and panel mount models, including wiring notes.

Section 4 Getting Started

Programming and Setup Wizards

Guide to configuring the unit using programming and setup wizards.

Configuration Settings (Comfort, Inputs, Outputs, Relays)

Covers clock, keypad, language, transmitter input, output, and relay configurations.

Advanced Functions (Profiles, Logging, Alarms, Totalising)

Details on profile calculations, data logging, alarms, and totaliser functions.

Section 5 Service and Health Checks

Safety Messages

Safety precautions for servicing and health check procedures.

Servicing and Health Checks

Guidelines for servicing and performing health checks on the unit and transmitters.

Calibration Procedures

Steps for calibrating current inputs and outputs.

Appendix B Product Certifications

Hazardous Locations Certifications

Details on ATEX, UL, CSA, and IECEx intrinsically safe approvals.