Emerson Rosemount 8732EM Bedienungsanleitung

Quick Start Guide

00825-0400-4444, Rev AC

November 2017

Rosemount® 8732EM Transmitter with

Modbus Protocol

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.

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.

Quick Start Guide November 2017

2Rosemount 8732EM Transmitter with Modbus Protocol

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.

November 2017 Quick Start Guide

Quick Start Guide 3

2.2 Emerson Flow customer service

Email:

•Worldwide: [email protected]

•Asia-Pacific: [email protected]

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

5200

The Nether-

lands

+31 (0) 704 136

666

New Zealand 099 128 804

Mexico +41 (0) 41 7686

111

France 0800 917 901 India 800 440 1468

Argentina +54 11 4837

7000

Germany 0800 182 5347 Pakistan 888 550 2682

Brazil +55 15 3413

8000

Italy 8008 77334 China +86 21 2892

9000

Venezuela +58 26 1731

3446

Central & East-

ern

+41 (0) 41 7686

111

Japan +81 3 5769

6803

Russia/CIS +7 495 981

9811

South Korea +82 2 3438

4600

Egypt 0800 000 0015 Singapore +65 6 777 8211

Oman 800 70101 Thailand 001 800 441

6426

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

Quick Start Guide November 2017

4Rosemount 8732EM Transmitter with Modbus Protocol

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

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.

November 2017 Quick Start Guide

Quick Start Guide 5

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:

7.49

[190,0]

8.81

[224,0]

5.0

[128] 3.00

[76,2]

10.5

[130]

3.07

[78,0]

2.71

[76,2]

5.0

[128]

11.02

[280.0]

6.48

[164,6]

2.71

[68,8]

1.97

[50,0]

5.82

[148,0]

1.94

[49,0]

6.48

[164,6] A

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.

Quick Start Guide November 2017

6Rosemount 8732EM Transmitter with Modbus Protocol

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

source.

Electrical dataTable 3-2:

Rosemount 8732EM Flow Transmitter

Power input AC power:

90–250VAC, 0.45A, 40VA

Standard DC power:

12–42VDC, 1.2A, 15W

Low power DC:

12–30VDC, 0.25A, 4W

Pulsed circuit Internally powered (Active): Outputs up to

12VDC, 12.1mA, 73mW

Externally powered (Passive): Input up to

28VDC, 100mA, 1W

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

3.3VDC, 100mA, 100mW

Termination resisters Typically 120 ohms. Refer to the MODBUS over

Serial Line Specification & Implementation

Guide (http://www.modbus.org) for more de-

tails.

Um 250V

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

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.

November 2017 Quick Start Guide

Quick Start Guide 7

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.

Mounting bracketFigure 4-1:

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.

Quick Start Guide November 2017

8Rosemount 8732EM Transmitter with Modbus Protocol

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.

November 2017 Quick Start Guide

Quick Start Guide 9

Best practice conduit preparationFigure 5-1:

A. Power

B. Output

C. Coil

D. Electrode

E. Safety ground

5.3 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).

Quick Start Guide November 2017

10 Rosemount 8732EM Transmitter with Modbus Protocol

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