Rosemount Quick Start Guide: 8732EM with Modbus Manuals & Guides

Quick Start Guide

00825-0400-4444, Rev AC

November 2017

Rosemount® 8732EM Transmitter with
Modbus Protocol

Quick Start Guide

1 Safety

WARNING!

• Failure to follow these installation guidelines could result in serious injury

or death.

• Installation and servicing instructions are for use by qualified personnel

only. Do not perform any servicing other than that contained in the
operating instructions, unless qualified.

• Rosemount Magnetic Flowmeters ordered with non-standard paint

options or non-metallic labels may be subject to electrostatic discharge.
To avoid electrostatic charge build-up, do not rub the flowmeter with a
dry cloth or clean with solvents.

• Verify that the operating environment of the sensor and transmitter is

consistent with the appropriate Agency Approval.

• If installed in an explosive atmosphere, verify that the device certification

and installation techniques are suitable for that particular environment.

• To prevent ignition of flammable or combustible atmosphere, disconnect

power before servicing circuits.

• Explosion hazard—Do not disconnect equipment when a flammable or

combustible atmosphere is present.

• Do not connect a Rosemount Transmitter to a non-Rosemount sensor

when installed in an “Ex” environment, explosive atmosphere, hazardous
area, or classified area.

• Follow national, local, and plant standards to properly earth ground the

transmitter and sensor. The earth ground must be separate from the
process reference ground.

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CAUTION!

• In cases where high voltage/high current are present near the meter

installation, ensure proper protection methods are followed to prevent
stray voltage/current from passing through the meter. Failure to
adequately protect the meter could result in damage to the transmitter
and lead to meter failure.

• Completely remove all electrical connections from both sensor and

transmitter prior to welding on the pipe. For maximum protection of the
sensor, consider removing it from the pipeline.

2 Rosemount 8732EM Transmitter with Modbus Protocol

November 2017

2 Introduction

This document provides basic installation guidelines for the Rosemount
8732EM field-mount transmitter.

• For sensor installation refer to the Rosemount® 8700 Magnetic Flowmeter

Sensor Quick Installation Guide

• For additional installation information, configuration, maintenance, and

troubleshooting, refer to the Rosemount® 8732EM Transmitter with

Modbus Protocol Reference Manual

All user documentation can be found at www.emerson.com. For more contact
information see Section 2.2.

2.1 Return policy

Emerson procedures must be followed when returning equipment. These
procedures ensure legal compliance with government transportation
agencies and help provide a safe working environment for Emerson
employees. Failure to follow Emerson procedures will result in your
equipment being refused delivery.

Quick Start Guide

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Quick Start Guide November 2017

2.2 Emerson Flow customer service

Email:

• Worldwide: [e-mail]

• Asia-Pacific: [e-mail]

Telephone:

North and South America Europe and Middle East Asia Pacific

United States 800 522 6277 U.K. 0870 240 1978 Australia 800 158 727

Canada +1 303 527

Mexico [phone]

Argentina [phone]

Brazil [phone]

Venezuela [phone]

5200

111

7000

8000

3446

The Nether­lands

France 0800 917 901 India 800 440 1468

Germany 0800 182 5347 Pakistan 888 550 2682

Italy 8008 77334 China [phone]

Central & East­ern

Russia/CIS +7 495 981

Egypt 0800 000 0015 Singapore [phone]

Oman 800 70101 Thailand 001 800 441

Qatar 431 0044 Malaysia 800 814 008

Kuwait 663 299 01

South Africa 800 991 390

Saudi Arabia 800 844 9564

UAE 800 0444 0684

[phone]
666

[phone]
111

9811

New Zealand 099 128 804

9000

Japan +81 3 5769

South Korea +82 2 3438

6803

4600

6426

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3 Pre-installation

Before installing the transmitter, there are several pre-installation steps that
should be completed to make the installation process easier:

• Identify options and configurations that apply to your application

• Set the hardware switches if necessary

• Consider mechanical, electrical, and environmental requirements

Note

Refer to the product reference manual for more detailed requirements.

Identify options and configurations

The typical transmitter installation includes a device power connection, a
Modbus RS-485 output connection, and sensor coil and electrode
connections. Other applications may require one or more of the following
configurations or options:

• Pulse output

• Discrete input/discrete output

Hardware switches

Quick Start Guide

The transmitter has two user-selectable hardware switches. These switches
set the internal/external pulse power and transmitter security. The standard
configuration for these switches when shipped from the factory is as follows:

Hardware switch default settingsTable 3-1:

Setting Factory configuration

Internal/external pulse power External

Transmitter security Off

The internal/external pulse power switch is not available when ordered with
intrinsically safe output, ordering code B.

In most cases, it is not necessary to change the setting of the hardware
switches. If the switch settings need to be changed, refer to the product
reference manual.

Be sure to identify any additional options and configurations that apply to the
installation. Keep a list of these options for consideration during the
installation and configuration procedures.

Quick Start Guide 5

Quick Start Guide

Mechanical considerations

The mounting site for the transmitter should provide enough room for
secure mounting, easy access to conduit entries, full opening of the
transmitter covers, and easy readability of the Local Operator Interface (LOI)
screen (if equipped).

Rosemount 8732EM dimensional drawingFigure 3-1:

10.5
[130]

5.0

[128]

1.94

[49,0]

3.00

[76,2]

7.49

[190,0]

6.48

[164,6]

A

3.07

[78,0]

8.81

[224,0]

B

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2.71

[76,2]

5.0

[128]

A

11.02

[280.0]

6.48

[164,6]

5.82

[148,0]

1.97

[50,0]

2.71
[68,8]

C

A. Conduit entry ½–14 NPT or M20
B. LOI cover
C. Mounting screws

Electrical considerations

Before making any electrical connections to the transmitter, consider
national, local, and plant electrical installation requirements. Be sure to have
the proper power supply, conduit, and other accessories necessary to comply
with these standards.

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November 2017

The transmitter requires external power. Ensure access to a suitable power
source.

Rosemount 8732EM Flow Transmitter

Power input AC power:

Pulsed circuit Internally powered (Active): Outputs up to

Modbus output circuit Internally powered (Active): Outputs up to

Termination resisters Typically 120 ohms. Refer to the MODBUS over

Um 250V

Coil excitation output 500mA, 40V max, 9W max

Quick Start Guide

Electrical dataTable 3-2:

90–250VAC, 0.45A, 40VA

Standard DC power:
12–42VDC, 1.2A, 15W

Low power DC:
12–30VDC, 0.25A, 4W

12VDC, 12.1mA, 73mW
Externally powered (Passive): Input up to

28VDC, 100mA, 1W

3.3VDC, 100mA, 100mW

Serial Line Specification & Implementation
Guide (http://www.modbus.org) for more de­tails.

Environmental considerations

To ensure maximum transmitter life, avoid extreme temperatures and
excessive vibration. Typical problem areas include the following:

• High-vibration lines with integrally mounted transmitters

• Tropical or desert installations in direct sunlight

• Outdoor installations in arctic climates

Remote mounted transmitters may be installed in the control room to
protect the electronics from the harsh environment and to provide easy
access for configuration or service.

Quick Start Guide 7

Quick Start Guide

4 Mounting

Remote-mount transmitters are shipped wth a mounting bracket for use on a
2-in. pipe or a flat surface.

Procedure

1. Orient the transmitter on the mounting bracket.

2. Attach the mounting bracket to the instrument pole and securely tighten
the fasteners.

A

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Mounting bracketFigure 4-1:

C

B

D

A. U-bolt
B. Mounting bracket
C. Transmitter
D. Fasteners (example configuration)

3. To enable correct orientation, the LOI can be rotated in 90 degree
increments up to 180 degrees. Do not rotate more than 180 degrees in
any one direction.

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5 Wiring

5.1 Conduit entries and connections

Transmitter conduit entry ports can be ordered with ½"-14NPT or M20
female threaded connections. Conduit connections should be made in
accordance with national, local, and plant electrical codes. Unused conduit
entries should be sealed with the appropriate certified plugs. The plastic
shipping plugs do not provide ingress protection.

5.2 Conduit requirements

• For installations with an intrinsically safe electrode circuit, a separate

conduit for the coil cable and the electrode cable may be required. Refer
to the product reference manual.

• For installations with non-intrinsically safe electrode circuit, or when

using the combination cable, a single dedicated conduit run for the coil
drive and electrode cable between the sensor and the remote transmitter
may be acceptable. Removal of the barriers for intrinsic safety isolation is
permitted for non-intrinsically safe electrode installations.

• Bundled cables from other equipment in a single conduit are likely to

create interference and noise in the system. See Figure 5-1.

• Electrode cables should not be run together in the same cable tray with

power cables.

• Output cables should not be run together with power cables.

• Select conduit size appropriate to feed cables through to the flowmeter.

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Quick Start Guide

A

B

B

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Best practice conduit preparationFigure 5-1:

E

E

C

D

E

A. Power
B. Output
C. Coil
D. Electrode
E. Safety ground

5.3

10 Rosemount 8732EM Transmitter with Modbus Protocol

Sensor to transmitter wiring

Integral mount transmitters

Integral mount transmitters ordered with a sensor will be shipped assembled
and wired at the factory using an interconnecting cable. Use only the factory
supplied cable provided with the instrument. For replacement transmitters
use the existing interconnecting cable from the original assembly.
Replacement cables, if applicable, are available (see Figure 5-2).