Rosemount 2051G Pressure Transmitter with 4-20 mA HART Protocol (Revision 5 and 7) Quick Start Guide

Quick Start Guide

00825-0700-4101, Rev AD

May 2019

Rosemount™ 2051G Pressure
Transmitter

with 4-20 mA HART® Protocol (Revision 5
and 7)

Quick Start Guide May 2019

Contents

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

System readiness......................................................................................................................... 5

Mount the transmitter..................................................................................................................6

Set the switches........................................................................................................................... 9

Connect the wiring and power up...............................................................................................10

Verify transmitter configuration.................................................................................................13

Trim the transmitter...................................................................................................................19

Safety instrumented systems..................................................................................................... 22

Product certifications................................................................................................................. 23

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May 2019 Quick Start Guide

1 About this guide

This guide provides basic guidelines for Rosemount™ 2051G Transmitters. It
does not provide instructions for configuration, diagnostics, maintenance,
service, troubleshooting, Explosion-proof, Flameproof, or intrinsically safe
(I.S.) installations. See the Rosemount 2051G Reference Manual for more
information.

WARNING

Explosions could result in death or serious injury.

Installation of these transmitters 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
Rosemount 2051 Reference Manual for any restrictions associated with a
safe installation.

Before connecting a HART-based 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.

In an explosion-proof/flameproof installation, do not remove the
transmitter covers when power is applied to the unit.

Process leaks could result in death or serious injury.

To avoid process leaks, only use the O-ring designed to seal with the
corresponding flange adapter.

Electrical shock could cause death or serious injury.

Avoid contact with the leads and terminals. High voltage that may be
present on leads can cause electrical shock.

Conduit/cable entries

Unless marked, the conduit/cable entries in the transmitter housing use a
½–14 NPT thread form. Entries marked “M20” are M20 × 1.5 thread form.
On devices with multiple conduit entries, all entries will have the same
thread form. Only use plugs, adapters, glands, or conduit with a
compatible thread form when closing these entries.

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Quick Start Guide May 2019

WARNING

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.

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2 System readiness

2.1 Confirm HART Revision capability

• If using HART® based control or asset management systems, confirm the

HART capability of those systems prior to transmitter installation. Not all
systems are capable of communicating with HART Revision 7. This
transmitter can be configured for either HART Revision 5 or 7.

• For instructions on how to change the HART revision of the transmitter,

see Switch HART revision mode.

2.2 Confirm correct device driver

Procedure

1. Verify the latest Device Driver (DD/DTM™) is loaded on your systems
to ensure proper communications.

2. Reference Emerson.com or FieldCommGroup.org for the latest DD.

3. Select desired product and download the DD.

a) Reference Table 2-1 for the correct DD.

Table 2-1: Device Revisions and Files

Identify device Find device driver

Softwar
e release
date

June
2016

(1) NAMUR revision is located on the hardware tag of the device. Differences in level 3 changes,

(2) HART software revision can be read using a HART capable configuration tool. Value shown

(3) Device driver file names use device and DD revision (e.g. 10_01). HART Protocol is designed

(4) HART Revision 5 and 7 selectable, Local Operator Interface (LOI), scaled variable,

Quick Start Guide 5

NAMUR
hardwar
e
revision

1)

1.1.xx 1.0.xx 03 7 10 Reference

signified above by xx, represent minor product changes as defined per NE53. Compatibility
and functionality are preserved and product can be used interchangeably.

is minimum revision that could correspond to NAMUR revisions.

to enable legacy device driver revisions to continue to communicate with new HART devices.
To access new functionality, the new device driver must be downloaded. It is recommended
to download new device driver files to ensure full functionality.

configurable alarms, expanded engineering units. Updated electronics hardware design.
Intrinsically Safe temperature classification change.

NAMUR
software
revision

(

1)

HART
software

(

revision

2)

files

HART
universa

(

l revision

5 9

Device
revision

3)

Review
instructio
ns

00809-04

(

00-4101

Manual

Review
functionali
ty

Changes to
software

(4)

(4)

Quick Start Guide May 2019

3 Mount the transmitter

Mount directly to the impulse line without using an additional mounting
bracket or mount directly to a wall, panel, or two-inch pipe using an optional
mounting bracket.

Figure 3-1: Transmitter Direct Mounting

A. Process connection

Note

Do not apply torque directly to the electronics housing. To avoid damage,
apply torque only to the hex-shaped process connection.

Figure 3-2: Panel and Pipe Mounting

Panel mount

Pipe mount

3.1 Liquid flow applications

Procedure

1. Place taps to the side of the line.

2. Mount beside or below the taps.

3. Mount the transmitter so the drain/vent valves are oriented upward.

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3.2 Gas flow applications

Procedure

1. Place taps in the top or side of the line.

2. Mount level or above the taps.

3.3 Steam flow applications

Procedure

1. Place taps to the side of the line.

2. Mount beside or below the taps.

3. Fill impulse lines with water.

3.4

Quick Start Guide 7

Environmental seal for housing

Thread sealing (PTFE) tape or paste on male threads of conduit is required to
provide a water/dust tight conduit seal and meets requirements of NEMA
Type 4X, IP66, and IP68. Consult factory if other ingress protection ratings
are required.

®

Quick Start Guide May 2019

For M20 threads, install conduit plugs to full thread engagement or until
mechanical resistance is met.

3.5 Gage transmitter orientation

The low side pressure port (atmospheric reference) on the inline gage
transmitter is located in the neck of the transmitter, behind the housing. The
vent path is 360° around the transmitter between the housing and sensor.
(See Figure 3-3).

CAUTION

Keep the vent path free of any obstruction, including but not limited to
paint, dust, and lubrication by mounting the transmitter so the
contaminants can drain away.

Figure 3-3: Gage Low Side Pressure Port

A

Low side pressure port (atmospheric reference)

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4 Set the switches

Set alarm and security switch configuration before installation as shown in

Figure 4-1.

• The alarm switch sets the analog output alarm to high or low. Default

alarm is high.

• The security switch allows (

transmitter. Default security is off (

Use the following procedure to change the switch configuration:

Procedure

1. If the transmitter is installed, secure the loop, and remove power.

2. Remove the housing cover opposite the field terminal side. Do not
remove the instrument cover in explosive atmospheres when the
circuit is live.

3. Slide the security and alarm switches into the preferred position
using a small screwdriver.

4. Reattach the transmitter cover. The cover must be fully engaged to
comply with explosion-proof requirements.

Figure 4-1: Transmitter Electronics Board

Without LCD display With LOI/LCD display

) or prevents ( ) any configuration of the

).

A. Alarm
B. Security

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Quick Start Guide May 2019

5 Connect the wiring and power up

CAUTION

Do not tamper with or remove the electronics board in the Rosemount
2051G. This will cause permanent damage to the transmitter.

Shielded twisted pair cable should be used for best results. Use 24 AWG or
larger wire that does not exceed 5000 ft. (1500 m) in length. If applicable,
install wiring with a drip loop. Arrange the drip loop so the bottom is lower
than the conduit connections and the transmitter housing.

Figure 5-1: Wiring the Transmitter (4–20 mA HART)

A

Vdc supply

B

RL ≥ 250 (necessary for HART® communication only)

™

CAUTION

Installation of the transient protection terminal block does not provide
transient protection unless the transmitter case is properly grounded.

Do not run signal wiring in conduit or open trays with power wiring, or
near heavy electrical equipment.

Do not connect the powered signal wiring to the test terminals. Power
could damage the test diode in the terminal block.

Use the following steps to wire the transmitter:

Procedure

1. Remove the housing cover on the FIELD TERMINALS side.

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2. Connect the leads as shown in Figure 5-1.

3. Tighten the terminal screws to ensure full contact with the terminal
block screw and washer. When using a direct wiring method, wrap
wire clockwise to ensure it is in place when tightening the terminal
block screw.

Note

The use of a pin or ferrule wire terminal is not recommended as the
connection may be more susceptible to loosening over time or under
vibration.

4. Ground housing to fulfill local grounding regulations.

5. Ensure proper grounding. It is important that the instrument cable
shield:

• Be trimmed close and insulated from touching the transmitter

housing

• Be connected to the next shield if cable is routed through a

junction box

• Be connected to a good earth ground at the power supply end

6. If transient protection is needed, refer to Grounding for transient

terminal block section for grounding instructions.

7. Plug and seal unused conduit connections.

8. Replace the housing cover.

Quick Start Guide 11

DP

A

B

C

D

E

Quick Start Guide May 2019

Figure 5-2: Grounding

A. Trim shield and insulate
B. Insulate shield
C. Terminate cable shield drain wire to earth ground

D. Internal ground location

E. External ground location

5.1 Grounding for transient terminal block

Ground termination is provided on the outside of the electronics housing
and inside the terminal compartment. These grounds are used when the
transient protection terminal blocks are installed. It is recommended that 18
AWG or larger wire is used to connect housing ground to earth ground
(internal or external).

If the transmitter is currently not wired for power up and communication,
follow Connect the wiring and power up. When the transmitter is properly
wired, refer to Figure 5-2 for internal and external transient grounding
locations.

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