Emerson Rosemount 2051 Wireless Series User manual

Quick Start Guide
00825-0400-4101, Rev DB
October2023
Rosemount™ 2051 Pressure
Transmitter and Rosemount 2051CF
Series Flow Meter
with PROFIBUS® PA Protocol

Safety messages
This guide provides basic guidelines for installing the Rosemount 2051 Transmitter.
It does not provide instructions for configuration, diagnostics, maintenance, service,
troubleshooting, explosionproof, flameproof, or intrinsically safe (IS) installations.
NOTICE
The products described in this document are NOT designed for nuclear-qualified
applications. Using non-nuclear qualified products in applications that require nuclear-
qualified hardware or products may cause inaccurate readings. For information on
Rosemount nuclear-qualified products, contact your local Emerson Sales Representative.
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 handheld communicator in an explosive atmosphere, ensure that
the instruments are installed in accordance with intrinsically safe or non-incendive field
wiring practices.
In an explosionproof/flameproof installation, do not remove the transmitter covers when
power is applied to the transmitter.
Process leaks may cause harm or result in death.
Install and tighten process connectors before applying pressure.
Do not attempt to loosen or remove flange bolts while the transmitter is in service.
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.
Before connecting a handheld communicator in an explosive atmosphere, be sure that
the instruments in the loop are installed in accordance with intrinsically safe or non-
incendive field wiring practices.
In an explosionproof/flameproof installation, do not remove the transmitter covers when
power is applied to the transmitter.
WARNING
Replacement equipment or spare parts not approved by Emerson for use as spare parts
could reduce the pressure retaining capabilities of the transmitter and may render the
instrument dangerous.
Use only bolts supplied or sold by Emerson as spare parts.
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NOTICE
Improper assembly of manifolds to traditional flange can damage sensor module.
For safe assembly of manifold to traditional flange, bolts must break back plane of flange
web (bolt hole) but must not contact sensor module housing.
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 in protecting
your system. Restrict physical access by unauthorized personnel to protect end users’ assets.
This is true for all systems used within the facility.
Contents
Mounting the transmitter........................................................................................................... 5
Rotate housing........................................................................................................................... 12
Setting jumpers and switches.................................................................................................. 13
Connect wiring and power up..................................................................................................14
Basic configuration.................................................................................................................... 19
Trim the transmitter.................................................................................................................. 22
Rosemount 2051 product certifications..................................................................................23
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1 Mounting the transmitter
1.1 Mount the transmitter in liquid applications
Procedure
1. Place taps to the side of the line.
2. Mount the transmitter beside or below the taps.
Mount the transmitter so the drain/vent valves are oriented
upward.
1.2 Mount the transmitter in gas applications
Procedure
1. Place taps on the top or side of the line.
2. Mount the transmitter beside or above the taps.
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1.3 Mount the transmitter in steam applications
Procedure
1. Place taps to the side of the line.
2. Mount the transmitter beside or below the taps.
3. Fill impulse lines with water.
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1.4 Panel and pipe mounting
Figure 1-1: Panel and pipe mounting
Panel mount(1) Pipe mount
Coplanar flange
Traditional flange

Rosemount 2051
(1) 5/16 × 1½ panel bolts are customer supplied.
1.5 Install bolts
If the transmitter installation requires assembly of the process
flanges, manifolds, or flange adapters, follow the assembly
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guidelines to ensure a tight seal for optimal performance
characteristics of the transmitter.
Use only bolts supplied with the transmitter or sold by Emerson as
spare parts. Figure 1-2 illustrates common transmitter assemblies
with the bolt length required for proper transmitter assembly.
Figure 1-2: Common transmitter assemblies
A
4 × 1.75-in.
(44 mm)
D
4 × 1.75-in.
(44 mm)
4 × 2.25-in.
(57 mm)
C
4 ×1.75-in.
(44 mm) 4 ×1.50-in.
(38 mm)
B
4 × 2.88-in.
(73 mm)
A. Transmitter with coplanar flange
B. Transmitter with coplanar flange and optional flange adapters
C. Transmitter with traditional flange and optional flange adapters
D. Transmitter with coplanar flange and optional manifold and
flange adapters
Bolts are typically carbon steel (CS) or stainless steel (SST). Confirm
the material by viewing the markings on the head of the bolt and
referencing Table 1-1. If bolt material is not shown in Table 1-1,
contact a local Emerson representative for more information.
Carbon steel bolts do not require lubrication, and the stainless steel
bolts are coated with a lubricant to ease installation. However, do not
apply any additional lubricant when installing either type of bolt.
Procedure
1. Tighten the bolts by hand.
2. Torque the bolts to the initial torque value using a crossing
pattern.
See Table 1-1 for initial torque value.
3. Torque the bolts to the final torque value using the same
crossing pattern.
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See Table 1-1 for final torque value.
4. Verify the flange bolts are protruding through the sensor
module bolt holes before applying pressure.
Table 1-1: Torque values for the flange and flange adapter bolts
Bolt
material
Head markings Initial
torque
Final torque
CS
B7M

300 in.-lb. 650 in.-lb.
SST
316
316
316
SW
316
STM
316
R
B8M

150 in.-lb. 300 in.-lb.
1.6 O-rings
The two styles of Rosemount flange adapters (Rosemount
3051/2051/2024/3095) each require a unique O-ring (see Figure 1-3).
Use only the O-ring designed for the corresponding flange adapter.
WARNING
Failure to install proper flange adapter O-rings may cause process
leaks, which can result in death or serious injury.
The two flange adapters are distinguished by unique O-ring grooves.
Only use the O-ring that is designed for its specific flange adapter, as
shown in Figure 1-3. When compressed, PTFE O-rings tend to cold
flow, which aids in their sealing capabilities.
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Figure 1-3: O-rings
A. Flange adapter
B. O-ring
C. PFTE based
D. Elastomer
NOTICE
Replace PTFE O-rings if you remove the flange adapter.
1.7 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.
For M20 threads, install conduit plugs to full thread engagement or
until mechanical resistance is met.
1.8 In-line gauge transmitter orientation
The low side pressure port (atmospheric reference) on the in-line
gauge 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 1-4.)
Keep the vent path free of any obstruction, including but not limited
to paint, dust, and lubrication by mounting the transmitter so fluids
can drain away.
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Figure 1-4: In-line gauge low side pressure port
A
A. Pressure port location
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2 Rotate housing
To improve field access to wiring or to better view the optional LCD
display:
Procedure
1. Loosen the housing rotation set screw using a 5/64 -in. hex
wrench.
Figure 2-1: Housing rotation
A
A. Housing rotation set screw (5/64-in.)
2. Rotate the housing clockwise to the desired location.
3. If the desired location cannot be achieved due to thread
limitation, rotate the housing counterclockwise to the desired
location (up to 360° from thread limit).
4. Retighten the housing rotation set screw to no more than 7
in.-lbs. when desired location is reached.
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3 Setting jumpers and switches
3.1 Security jumper
After the transmitter is configured, you may want to protect the
configuration data from unwarranted changes.
Each transmitter is equipped with a security jumper that can be
positioned ON to prevent the accidental or deliberate change of
configuration data. The jumper is labeled Security. The Security
jumper also prevents changes made using the local operator
interface.
3.2 Simulate jumper
The Simulate jumper is used in conjunction with the analog input (AI)
block.
This jumper is used to simulate the pressure measurement and is
used as a lock-out feature for the AI block. To enable the simulate
feature, put the jumper in the ON position after applying power.
This feature prevents the transmitter from being accidentally left in
Simulate mode.
Figure 3-1: Transmitter jumper locations
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4 Connect wiring and power up
Procedure
1. Remove the housing cover on the field terminals side.
2. Connect the power leads to the terminals indicated on the
terminal block label.
3. Power terminals are polarity insensitive; connect positive or
negative to either terminal.
4. Ensure full contact with 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.
NOTICE
Emerson does not recommend using a pin or a ferrule wire
terminal, as the connection may be more susceptible to
loosening over time or under vibration.
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. Plug and seal unused conduit connections.
7. 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.
8. Replace the housing cover.
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Example
Figure 4-1: Terminals
A
B
A. Power terminals
B. Ground terminal
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Figure 4-2: Wiring
B
A
C
D E
G
F
II
J
H
A. 6234 ft. (1900 m) maximum (depending on cable characteristics)
B. Integrated power conditioner and filter
C. Terminators
D. Power supply
E. DP/PA coupler/link
F. Trunk
G. DP network
H. Signal wiring
I. Spur
J. PROFIBUS® PA device
4.1 Ground signal wiring
WARNING
Do not run signal wiring in conduit or open trays with power wiring
or near heavy electrical equipment.
Grounding terminations are provided on the outside of the
electronics housing and inside the terminal compartment. These
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grounds are used when transient protect terminal blocks are
installed or to fulfill local regulations. See Step2 for more
information on how to ground the cable shield.
Procedure
1. Remove the field terminals housing cover.
2. Connect the wiring pair and ground as indicated in Figure 4-3.
The cable shield should:
•Be trimmed close and insulated from touching the
transmitter housing.
•Continuously connect to the termination point.
•Be connected to a good earth ground at the power supply
end.
Figure 4-3: Wiring
DP
A
B
C
A. Trim shield and insulate
B. Insulate shield
C. Connect shield back to the power supply ground
3. Replace the housing cover.
Emerson recommends tightening the cover until there is no
gap between the cover and the housing.
4. Plug and seal unused conduit connections.
4.1.1 Power supply
The dc power supply should provide power with less than two
percent ripple. The transmitter requires between 9 and 32 Vdc at the
terminals to operate and provide complete functionality.
4.1.2 Power conditioner
The DP/PA coupler/link often includes an integrated power
conditioner.
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4.1.3 Grounding
Transmitters are electrically isolated to 500 Vac rms. Signal wiring
cannot be grounded.
4.1.4 Shield wire ground
Shield wire usually requires a single grounding point to avoid
creating a ground loop. The ground point is typically at the power
supply.
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5 Basic configuration
5.1 Configuration tasks
The transmitter can be configured via either the local operator
interface (LOI) – option code M4, or via a Class 2 master (DD or
DTM™ based). The two basic configuration tasks for the PROFIBUS PA
Pressure transmitter are:
Procedure
1. Assign address.
2. Configure engineering units (scaling).
Note
Rosemount 2051 PROFIBUS PA Profile 3.02 devices are set to
identification number adaptation mode when shipped from
the factory. This mode allows the transmitter to communicate
with any PROFIBUS PA control host with either the generic
Profile GSD (9700) or Rosemount 2051 specific GSD (3333)
loaded on the host; therefore, it is not required to change the
transmitter identification number at start-up.
5.1.1 Assign address
The Rosemount 2051 Pressure Transmitter is shipped with a
temporary address of 126. This must be changed to a unique
value between 0 and 125 in order to establish communication
with the host. Usually, addresses 0–2 are reserved for masters or
couplers, therefore transmitter addresses between 3 and 125 are
recommended.
Address can be set via either:
•LOI – see Table 5-1 and Figure 5-1
•Class 2 master – see Class 2 Master Manual for setting address
5.1.2 Configure engineering units
Unless otherwise requested, the Rosemount 2051 Pressure
Transmitter ships with the following settings:
•Measurement mode: Pressure
•Engineering units: inches H2O
•Scaling: None
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Engineering units should be confirmed or configured before
installation. Units can be configured for Pressure, Flow, or Level
measurement.
Measurement type, Units, Scaling, and Low Flow Cutoff (when
applicable) can be set via either:
•LOI – see Table 5-1 and Figure 5-1
•Class 2 master – see Table 5-2 for parameter configuration
5.2 Configuration tools
5.2.1 Local operator interface (LOI)
When ordered, the LOI can be used for commissioning the device. To
activate the LOI, push either configuration button located under the
top tag of the transmitter. See Table 5-1 and Figure 5-1 for operation
and menu information. The security jumper prevents changes made
using the LOI.
Note
Buttons must be fully engaged ≈ 0.5-in. (10 mm) of travel.
Table 5-1: LOI Button Operation
Button Action Navigation Character Entry Save?

Scroll Moves down
menu categories
Changes character
value(1)
Changes between
Save and Cancel
 Enter Selects menu
category
Enters character
and advances
Saves
(1) Characters blink when they can be changed.
Figure 5-1: LOI Menu
1. ADDRESS
6. IDENTIFICATION #
7. EXIT
4. DAMPING
5. DISPLAY
3. UNITS
2. CALIBRATION
PRESSURE
FLOW
LEVEL
TEMPERATURE
0-126
ZERO
LOWER SENSOR
UPPER SENSOR
RESET FACTORY
5.3 Class 2 Master
The Rosemount 2051 PROFIBUS DD and DTM files are available at
Emerson.com/Rosemount or by contacting your local salesperson.
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