Emerson Rosemount 848T Manual de usuario

Quick Start Guide

00825-0100-4697, Rev TC

May 2019

Rosemount™ 848T FOUNDATION™ Fieldbus

High Density Temperature Transmitter

Device Revision 8 - Requires New DD/CFF

Revision

Contents

About this guide...........................................................................................................................3

Mount the transmitter..................................................................................................................5

Wire and apply power...................................................................................................................9

Verify the tag............................................................................................................................. 16

Verify the transmitter configuration...........................................................................................17

Product certifications................................................................................................................. 18

Declaration of conformity.......................................................................................................... 32

China RoHS................................................................................................................................ 34

Quick Start Guide May 2019

2 Rosemount 848T

1 About this guide

This guide provides basic guidelines for the Rosemount™ 848T Temperature

Transmitter. It does not provide instructions for detailed configuration,

diagnostics, maintenance, service, troubleshooting. Refer to the Rosemount

848T Reference Manual for more instruction. The manual and this guide are

also available electronically on Emerson.com/Rosemount

WARNING

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 this manual for any

restrictions associated with a safe installation.

•Before connecting a 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.

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.

Physical access

•Unauthorized personnel may potentially cause significant damage to

and/or misconfiguration of end users’ equipment. This could be

intentional or unintentional and needs to be protected against.

•Physical security is an important part of any security program and

fundamental to protecting your system. Restrict physical access by

unauthorized personnel to protect end users’ assets. This is true for all

systems used within the facility.

CAUTION

This device complies with Part 15 of the FCC Rules. Operation is subject

to the following conditions:

•This device may not cause harmful interference.

•This device must accept any interference received, including

interference that may cause undesired operation.

•This device must be installed to ensure a minimum antenna separation

distance of 20 cm from all persons.

May 2019 Quick Start Guide

Quick Start Guide 3

NOTICE

Battery hazards remain when cells are discharged.

The power module may be replaced in a hazardous area. The power module

has surface resistivity greater than one gigaohm and must be properly

installed in the wireless device enclosure. Care must be taken during

transportation to and from the point of installation to prevent electrostatic

charge build-up.

Shipping considerations for wireless products.

•The unit was shipped to you without the power module installed.

Remove the power module prior to shipping.

•Each power module contains two “C” size primary lithium batteries.

Primary lithium batteries are regulated in transportation by the U. S.

Department of Transportation, and are also covered by IATA

(International Air Transport Association), ICAO (International Civil

Aviation Organization), and ARD (European Ground Transportation of

Dangerous Goods). It is the responsibility of the shipper to ensure

compliance with these or any other local requirements. Consult current

regulations and requirements before shipping.

Quick Start Guide May 2019

4 Rosemount 848T

2 Mount the transmitter

2.1 Mount to a DIN rail without a junction box

Procedure

1. Pull up the DIN rail mounting clip located on the top back side of the

transmitter.

2. Hinge the DIN rail into the slots on the bottom of the transmitter.

3. Tilt the Rosemount™ 848T and place onto the DIN rail.

4. Release the mounting clip.

Figure 2-1: Mounting the Rosemount 848T to a DIN Rail

A. Rosemount 848T without installed enclosure

B. DIN rail

C. DIN rail mounting clip

May 2019 Quick Start Guide

Quick Start Guide 5

2.2 Mount to a panel with a junction box

Figure 2-2: Aluminum/Plastic Junction Box

A. Aluminum or plastic junction box

B. Mounting screws (4)(1)

C. Panel

Figure 2-3: Stainless Steel Junction Box

A. Stainless steel junction box

B. Mounting screws (2)(1)

C. Panel

(1) Mount using four ¼–20 x 1.25-in. screws.

Quick Start Guide May 2019

6 Rosemount 848T

2.3 Mount to a 2-in. pipe stand

Prerequisites

Use the optional mounting bracket (option code B6) to attach the

Rosemount™ 848T to a 2-in. pipe stand when using a junction box.

Figure 2-4: Aluminum/Plastic Junction Box

Front view Side view

5.1

(130)

10.2

(260)

6.6

(167)

Figure 2-5: Stainless Steel Junction Box

Front view Side view

4.7 (114)

7.5 (190)

May 2019 Quick Start Guide

Quick Start Guide 7

Figure 2-6: Mounted on a Vertical Pipe

Aluminum/plastic junction box Stainless steel junction box

Quick Start Guide May 2019

8 Rosemount 848T

3 Wire and apply power

3.1 Using cable glands

Figure 3-1: Cable Gland

ACEGI

BDFH

A. Sensor 1

B. Sensor 2

C. Sensor 3

D. Sensor 4

E. Sensor 5

F. Sensor 6

G. Sensor 7

H. Sensor 8

I. Power/signal

J. Cover screw

Procedure

1. Remove the four cover screws to remove the junction box cover.

2. Run the sensor and power/signal wires through the appropriate pre-

installed cable glands.

3. Install the sensor wires into the correct screw terminals.

4. Attach the FOUNDATION™ Fieldbus wires to the screw terminals.

5. Replace the FOUNDATION Fieldbus cover and tighten all cover screws.

May 2019 Quick Start Guide

Quick Start Guide 9

3.2 Using conduit entries

Figure 3-2: Conduit Entries

ABCD

A. Sensor 1 and 2

B. Sensor 3 and 4

C. Sensor 5 and 6

D. Sensor 7 and 8

E. Power/signal

F. Cover screw

Procedure

1. Unscrew the four cover screws to remove the junction box cover.

2. Remove the five conduit plugs and install the user-supplied conduit

fittings.

3. Run pairs of sensor wires through each conduit fitting.

4. Install the sensor wires into the correct screw terminals.

5. Attach the FOUNDATION™ Fieldbus wires to the screw terminals.

6. Replace the enclosure cover and tighten all cover screws.

3.3 Sensor wiring and power supply

•Compatible with eight independently configurable channels including

combinations of 2- and 3-wire RTDs, thermocouples, mV, ohm, and mA

sensors.

•All sensor and power terminals are rated to 42.4 Vdc.

•FOUNDATION Fieldbus network powered with a terminal voltage of 9.0–

32.0 Vdc and 22 mA maximum current draw.

•For best network performance twisted, shielded pair cabling should be

used. Proper gage wire should be selected to maintain the 9.0 Vdc

minimum.

Quick Start Guide May 2019

10 Rosemount 848T

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