Emerson Rosemount 2110 Reference Manual

Rosemount™ 2110 Level Switch

Vibrating Fork

Reference Manual

00809-0100-4029, Rev CA

March 2018

Reference Manual

00809-0100-4029, Rev CA

Rosemount™ 2110 Level Switch

Vibrating Fork

Read this manual before working with the product. For personal and system safety, and for
optimum product performance, make sure you thoroughly understand the contents before
installing, using, or maintaining this product.

For technical assistance, contacts are listed below:

Customer Central

Technical support, quoting, and order-related questions.

United States - 1-800-999-9307 (7:00 am to 7:00 pm CST)

Asia Pacific- 65 777 8211

Europe/ Middle East/ Africa - 49 (8153) 9390

North American Response Center

Equipment service needs.

1-800-654-7768 (24 hours—includes Canada)

Outside of these areas, contact your local Emerson

™

representative.

Title Page

March 2018

Title Page

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.

i

Title Page

March 2018

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Contents

1Section 1: Introduction

1.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Manual overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3 Introduction to the Rosemount

1.4 Product recycling and disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2Section 2: Installation

2.1 Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Considerations before installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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™

2110. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3.1 Features list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3.2 Measurement principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3.3 Short fork technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3.4 Special features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2.1 Environmental considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.2 Application considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2.3 Installation considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2.3 Installation procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

2.3.1 Process connection seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.3.2 Correct fork alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

2.3.3 Mounting the threaded versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

2.3.4 Mounting the Tri Clamp versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

2.4 Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

2.4.1 Prepare the electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

2.4.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.5 LED Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

3Section 3: Troubleshooting

3.1 Magnetic test point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

3.2 Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

3.3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.4 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.5 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.6 Service support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Contents

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AAppendix A: Reference Data

A.1 Product Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

A.2 Ordering Information, Specifications, and Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

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Section 1 Introduction

1.1 Safety messages

Procedures and instructions in this manual may require special precautions to ensure the safety of the
personnel performing the operations. Information that raises potential safety issues is indicated by a

caution symbol ( ). The external hot surface symbol ( ) is used when a surface is hot and care must be
taken to avoid possible burns. If there is a risk of an electrical shock, the ( ) symbol is used. Refer to the

safety messages listed at the beginning of each section before performing an operation preceded by this
symbol.

Failure to follow these installation guidelines could result in death or serious injury.

 Protection afforded by compliance to EN61010-1 may be impaired if the equipment is not

used as specified.

 The Rosemount

maintained by suitably qualified personnel only, observing any national and local requirements
that may apply.

 Ensure the wiring is suitable for the electrical current and the insulation is suitable for the

voltage, temperature, and environment.

 Use the equipment only as specified in this manual. Failure to do so may impair the protection

provided by the equipment.

 Any substitution of non-recognized parts may jeopardize safety and is under no circumstances

allowed.

 Review the product approvals for any restrictions associated with an installation.

See “Reference Data” on page 29 for where to find the latest information.

 Verify that the operating environment of the level switch is not a hazardous area location.

External surface may be hot.

 Care must be taken to avoid possible burns.

Process leaks could result in death or serious injury.

 Install and tighten process connectors before applying pressure.
 Do not attempt to loosen or remove process connectors while the Rosemount 2110 is in

service.

Electrical shock could cause death or serious injury.

 If the liquid level switch is installed in a high voltage environment and a fault condition or

installation error occurs, high voltage may be present on leads and terminals.

 Use extreme caution when making contact with the leads and terminals.
 Make sure that power to the Rosemount 2110 is off while making connections.

™

2110 must be installed, connected, commissioned, operated, and

Introduction

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Introduction

1

Introduction

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1.2 Manual overview

This manual provides information on installing, operating, and maintaining all versions of the
Rosemount 2110 Vibrating Fork Liquid Level Switch (“level switch”).

Section 2: Installation provides instruction on mechanical and electrical installation procedures.
Section 3: Troubleshooting contains instructions about using the magnetic test point, as well as

inspection, basic maintenance, and troubleshooting information.

Appendix A: Reference Data contains instructions on how to find the latest product certifications,

specifications, dimension drawings, and ordering information on the Emerson.com/Rosemount

Note

Refer to the Rosemount 2110 Quick Start Guide

for instruction on hygienic installation of a level switch

with a 51 mm Tri Clamp fitting.

1.3 Introduction to the Rosemount 2110

The Rosemount 2110 is a liquid point level switch based on the vibrating short fork technology.
It is a compact switch with a rugged stainless steel body and forks for use in a wide range of liquid
applications. For most liquids, including coating and aerated liquids and slurries, the function is virtually
unaffected by flow, turbulence, bubbles, foam, vibration, or changing liquid properties.

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site.

1.3.1 Features list

Features include:

 Stainless steel housing and plug/socket connection for fast- fit, high-volume users.

 Compact and lightweight design for side, top, or bottom mounting.

 The industry standard DIN 43650 plug/socket is used for a fast connection. The polarity insensitivity

and short circuit protection make electrical hook-up safe and easy.

 Designed for operation in temperatures from –40 to 302 °F (–40 to 150 °C).

 Economical

mounting for food industry.

 Direct load switching (suits all supplies) or PNP output for direct interface to PLCs.

 “Fast drip” fork design gives quick response time.

 ‘Heartbeat’ LED gives an instant visual indication that the level switch is operational.

 Optimized fork shape for hand polishing to meet hygienic requirements.

 No moving parts or crevices (means virtually no maintenance).

 Magnetic test point for easy functional test.

This combination of features makes the Rosemount 2110 an ideal choice for a wide variety of
applications. The level switch is for use in non-hazardous (safe) area installations only.

See Figure 1-1 on page 3 for application examples.

3

/4 - or 1-in. threaded process connections for mounting in pipes or tanks, or Tri Clamp

2

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A

B

C

D

E

F

00809-0100-4029, Rev CA

Figure 1-1. Rosemount 2110 Features

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A. Industry standard DIN 43650 plug/socket
B. Stainless steel housing with magnetic test point
C. Hexagonal nut for tightening a threaded process connection, and for fork orientation
D. Threaded and Tri Clamp process connection options
E. ‘Fast drip’ fork design
F. Visible ‘heartbeat’ LED

1.3.2 Measurement principle

The Rosemount 2110 is designed to use the principle of a tuning fork. A piezo-electric crystal oscillates
the forks at their natural frequency. Changes to this frequency are continuously monitored. The
frequency of the vibrating fork sensor changes depending on the medium in which it is immersed. The
denser the liquid, the lower the frequency.

When used as a low level alarm, the liquid in the tank or pipe drains down past the fork, causing a change
of natural frequency that is detected by the electronics and switches the output state.

1.3.3 Short fork technology

When the Rosemount 2110 is used as a high level alarm, the liquid rises in the tank or pipe making
contact with the fork and causing the output state to switch.

The natural frequency (~1300Hz) of the fork avoids interference from plant vibration which may cause
false switching. It also gives short fork length for minimal intrusion into vessel and pipe. By using Short

Fork Technology and through extensive research, Emerson

™

has maximized the design and operational
effectiveness of the Rosemount 2110 making it suitable for practically all liquids, including coating
liquids, aerated liquids, and slurries.

Introduction

3

Introduction

March 2018

1.3.4 Special features

Fork design

The “fast drip” fork design draws liquid away from the fork tips when mounted horizontally, and together
with a short switching delay, allows the Rosemount 2110 to react quickly and with greater sensitivity to
density variations.

Heartbeat LED

The Rosemount 2110 has a ‘heartbeat’ LED indicating it is operating, and can be seen at all times.
The LED flashes when the switch output is ‘off’ and is constantly lit when 'on'.

Magnetic test point

A magnetic test-point is located on the side of the housing, allowing the user to perform a functional test
of the Rosemount 2110 and the system connected to it. Holding a magnet to the test-point causes the
output to change state.

Figure 1-2. Rosemount 2110 Application Examples

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Overfill protection

Spillage caused by overfilling can be hazardous to people and the environment, resulting in

lost product and potentially high clean up costs.

High and low level alarm

Maximum and minimum level detection in tanks containing different types of liquids are

ideal applications. The Rosemount 2110 operates continuously across the process
temperature range of –40 to 302 °F (–40 to 150 °C) and operating pressures of up to 1450
psig (100 barg), making it perfect for use as a high or low level alarm. It is common practice
to have an independent high level alarm switch as a backup to an installed level device in
case of primary failure.

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Introduction

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Pump protection or empty pipe detection

Short forks require minimum intrusion wetside and allow simple low cost installation at any

angle into pipes or vessels. Because the Rosemount 2110 projects only 2-in. (50 mm)
(depending on connection type), it can be installed in small diameter pipes. By selecting
the option of direct load switching electronics, it is ideal for reliable pump control and can
be used to protect against pumps running dry.

Pump control

Many processes have batching and header tanks with the need to control a pump to

maintain levels between set points. The Rosemount 2110 is ideal for these situations, since
these tanks are often manufactured from thin wall materials and cannot support the
weight of heavy instrumentation.

Leak detection

Flanges, gaskets, seals, corrosive liquids all have the potential to leak at the most

inconvenient times. Many users site tanks and vessels above trays, or in containments to
prevent any liquids from escaping. A level switch can quickly and accurately detect any
leakage, thereby eliminating costs.

Hygienic applications

The highly polished fork option provides a surface finish (Ra) better than

0.8 μm. The Rosemount 2110 meets the principle design criteria of the most stringent
hygienic requirements used in food and beverage, and pharmaceutical applications.
Manufactured in stainless steel, it is robust enough to easily withstand steam cleaning (CIP)
routines at temperatures up to 302 °F (150 °C).

1.4 Product recycling and disposal

Recycling of equipment and packaging should be taken into consideration. The product and packaging
should be disposed of in accordance with local and national legislation.

Introduction

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Introduction

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Section 2 Installation

Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 7

Considerations before installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 8

Installation procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 13

Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 18

LED Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 24

2.1 Safety messages

Failure to follow these installation guidelines could result in death or serious injury.

 The Rosemount

commissioned, operated, and maintained by suitably qualified personnel only, observing any
national and local requirements that may apply.

 Ensure the wiring is suitable for the electrical current and the insulation is suitable for the voltage,

temperature, and environment.

 Use the equipment only as specified in this manual. Failure to do so may impair the protection

provided by the equipment.

 Any substitution of non-recognized parts may jeopardize safety and is under no circumstances

allowed.

 Verify that the operating environment of the level switch is not a hazardous area location.

™

2110 Level Switch (“level switch”) must be installed, connected,

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March 2018

Failure to comply with the following requirements will result in the invalidation of the
product safety certification.

 Check for risk of process medium build-up on the level switch forks. Avoid situations where

drying and coating products may create an excessive build-up (see Figure 2-2 on page 9) or
implement preventative maintenance programs to ensure the build-up is not enough to impair
performance.

 Ensure there is no risk of 'bridging' of the level switch forks. Examples of products that create

'bridging' of the forks are dense paper slurries and bitumen.

External surface may be hot.

 Care must be taken to avoid possible burns.

Process leaks may cause harm or result in death.

 Install and tighten process connectors before applying pressure.
 Do not attempt to loosen or remove process connectors while the level switch is in service.

Electrical shock could cause death or serious injury.

 If the level switch is installed in a high voltage environment and a fault condition or installation

error occurs, high voltage may be present on leads and terminals.

 Use extreme caution when making contact with the leads and terminals.
 Make sure that power to the level switch is off while making connections.

Configuration

7

Configuration

March 2018

2.2 Considerations before installation

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00809-0100-4029, Rev CA

Important

Emerson
process parameters with the product, options, configuration or materials of construction selected.

™

is not in a position to evaluate or guarantee the compatibility of the process fluid or other

2.2.1 Environmental considerations

The Rosemount 2110 Level Switch is a wired point level device for use in open or closed tanks, and
pipework. The installation must be in a non-hazardous (safe) area.

All versions of the level switch are weatherproof and protected against the ingress of dust, but must be
protected from flooding.

Hygienically-certified and compliant versions have specific hygienic installation instructions in the
Rosemount 2110 Quick Start Guide

Avoid installing the level switch near heat sources.

Figure 2-1. Environmental Considerations

(see Emerson.com/Rosemount for other language versions).

2.2.2 Application considerations

For most liquids, including coating, aerated liquids and slurries, the function is virtually unaffected by
flow, turbulence, bubbles, foam, vibration, solid particles, build-up, or properties of the liquid.

The Rosemount 2110 Level Switch (“level switch”) is available for installation in non-hazardous (safe)
areas and process temperatures up to 302 °F (150 °C). It can be mounted in any position in the tank or
pipe using the

See Figure 1-2 on page 4 for application examples.

8

3

/4 - or 1-in. threaded or Tri Clamp fitting.

OKOK

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00809-0100-4029, Rev CA

Application limits

 Check for risk of process medium build-up on the level switch forks.

Avoid situations where a drying and coating process medium may create an excessive build-up

(see Figure 2-2 on page 9) or implement preventative maintenance programs to ensure the build-up is
not enough to impair performance.

 Ensure there is no risk of ‘bridging’ of the level switch forks. Examples of products that can create

‘bridging’ of forks are dense paper slurries and bitumen.

 Ensure the process is operating within the instrument operating temperature and pressure ranges

(see Appendix A: Reference Data).

 Ensure the liquid viscosity is within the recommended viscosity range

(see Appendix A: Reference Data).

Examples of products with too high viscosity are chocolate syrup, ketchup, peanut butter and

bitumen; the level switch still operates with these products, but the drain time can be very long.

 Check that the liquid density is higher than 37.5 lb/ft

low density include acetone, pentane, and hexane.

Liquid density affects the switching point e.g. dry-to-wet (see Figure 2-3 on page 10).

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March 2018

3

(600 kg/m3). Examples of products with a too

 Check the solids content in the liquid.

As a guideline, the maximum solid particle diameter in the liquid is 0.2-in. (5 mm). Extra consideration

is needed when dealing with particles bigger than 0.2-in. (5 mm). Consult the factory for advice.

 In almost all cases, the level switch is insensitive to foams (i.e. does not see the foam).

However, on rare occasions, some very dense foams may be seen as liquid; known examples of this are

found in ice-cream and orange juice manufacturing.

Figure 2-2. Avoid Product Build-up

Configuration

9

Configuration

SP

HYSP

0.1 in.

(2.5 mm)

0.5 in.

(13 mm)

0.5 in.

(13 mm)

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Figure 2-3. Switching Point

SP: Switching point (H20)
HY: Switching hysteresis

Note

When mounted vertically, a low density medium has a switching point closer to the process connection.
A high density medium has a switching point closer to fork tip.

2.2.3 Installation considerations

Measurement accuracy is dependent upon the proper installation of the level switch.
Keep in mind the need for easy access, personnel safety, practical field calibration, and a suitable
environment for the level switch.

How to handle the level switch

Do not hold using the forks (Figure 2-4 on page 11).

Device identification

To identify the Rosemount 2110 version, see the label on the housing.

Mounting orientation

Mount the level switch at any angle that allows the liquid level to rise or flow through the fork gap
(Figure 2-7 and Figure 2-8 on page 14).

10

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00809-0100-4029, Rev CA

Allow adequate space outside the tank or pipe

Mount the level switch in a position to allow easy access to the wiring terminals. Ensure there is sufficient
room for making electrical connections.

For dimensional drawings, see Appendix A: Reference Data for where to find the latest information.

Figure 2-4. Handling the Rosemount 2110

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Figure 2-5. Do Not Modify the Rosemount 2110

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11

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Other recommendations

 Always install in the normally “on” state

– High level recommendation is Dry = on (see Table 2-2 on page 20)
– Low level recommendation is Wet = on (see Table 2-2 on page 20).

 Always ensure:

– The overall system is tested during commissioning by using the local magnetic test point

(Figure 3-1 on page 25).

– The forks do not come into contact with the tank wall, internal fittings, or any other obstructions.
– The installation does not create tank crevices around the forks where liquid may collect. This can

happen with high viscosity and high density liquids.

 Avoid:

– Installing the level switch near to liquid entering the tank at the fill point.
– Heavy splashing on the fork.

 Extra consideration is needed if the plant vibration is close to the 1300 Hz operating frequency of the

Rosemount 2110.

12

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B

A

E

C

E

F

D

00809-0100-4029, Rev CA

2.3 Installation procedures

2.3.1 Process connection seals

Figure 2-6. Process Connection Seals

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A. NPT or BSPT (R) thread
B. PTFE tape
C. Gasket

Configuration

D. BSPP (G) thread
E. Tri Clamp
F. The Tri Clamp seal is supplied as in as accessory kit (see Appendix A: Reference Data for where to find the latest information).

13

Configuration

Tri Clamp

Threaded

OKOK

OK

OK OK

Tri Clamp

Threaded

March 2018

2.3.2 Correct fork alignment

Pipe installation

Ensure the fork is correctly aligned by using the groove or notch as indicated in Figure 2-7.

Figure 2-7. Correct Fork Alignment for Pipe Installation

OK

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Tank installation

Figure 2-8. Correct Fork Alignment for Tank Installation

14

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Gasket may be used as a sealant
for BSPP (G) threaded connections.

Gasket (for BSPP (G) threaded connection)

Tighten using the
hexagon only

Gasket (for BSPP (G)
threaded connection)

Tighten using the
hexagon only

00809-0100-4029, Rev CA

2.3.3 Mounting the threaded versions

Seal and protect the threads

 Use anti-seize paste or PTFE tape according to your site procedures.

Mount the level switch on tank or pipework

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March 2018

 Threaded tank or pipework connection (vertical installation

 Threaded tank or pipework connection (horizontal installation

(1)

)

(1)

)

1. The level switch can be installed at any angle that allows the liquid level to rise or flow through the fork gap.

Configuration

15

Configuration

Gasket (customer supplied)

Gasket for BSPP (G) threads only

Tighten using the
hexagon only

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 Threaded flange connection

Place the customer supplied flange on the tank nozzle.

Tighten the bolts and nuts with sufficient torque for the flange and gasket.

Screw the level switch into the flange thread.

16

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2.3.4 Mounting the Tri Clamp versions

Lower the level switch onto the flange face

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Fit the Tri Clamp

Note

The Tri Clamp and seal are supplied in an accessory kit that has to be ordered separately.
See the Rosemount 2110 Product Data Sheet for ordering information.

Configuration

17

Configuration

March 2018

2.4 Electrical installation

2.4.1 Prepare the electrical connections

Cable selection

Twisted-pairs and shielded wiring is recommended for environments with high EMI (electromagnetic
interference). Two wires can be safely connected to each terminal screw. Maximum wire size is 15 AWG.

Cable gland

The cable gland is integrated in the four-position plug of the level switch.
Do not make any modifications to the level switch.

Power supply

The Direct Load electronics option operates on 21 - 264 Vdc or 21 - 264 Vac (50/60 Hz) at the level
switch terminals.

The PNP electronics option operates on 18 - 60 Vdc at the level switch terminals.

Mode selection

Reference Manual

00809-0100-4029, Rev CA

Table 2-1 on page 19 shows how the mode selection is determined from the wiring connections.

Modes are “Dry on, high level alarm” and “Wet on, low level alarm”.

Functions

Table 2-2 on page 20 shows the switched electrical outputs from the PNP and Direct Load electronics for

each mode selection.

Note

For direct load switching, a DPST (Double Pole, Single Throw) (on/off) switch must also be fitted for safe
disconnection of the power supply. Fit the DPST switch as near to the Rosemount 2110 as possible,
keeping the switch free of obstructions. Label the switch to indicate it is the supply disconnection device
for the Rosemount 2110.

18

Configuration

Reference Manual

Orientation

cut-out

2

3

1

PE (ground)

2A
(T)

R

L1 N

(21-264 Vac,
50/60 Hz)

+V 0 V

(21-264 Vdc)

1

3

1

3

R

2A
(T)

2

0V

+V (18-60 Vdc)

PLC

input

PE (ground)

Orientation

cut-out

2

3

1

1

R

2A
(T)

2

L1 N

(21-264 Vac,
50/60 Hz)

+V 0 V

(21-264 Vdc)

PE (ground)

1

3

R

2A
(T)

2

0 V

+V
(18-60 Vdc)

PLC

input

PE (ground)

R = external load
(must be wired)

R = external load

00809-0100-4029, Rev CA

Table 2-1. Mode Selection By Customer Wiring

Modes Electronics option code 0 Electronics option code 1

Configuration

March 2018

Dry = on,
high level alarm

Wet = on,
low level alarm

Load switching: ac/dc
Direct load switching: ac/dc

PNP output: dc
PNP for PLC/SPS connection: dc

Relay connection warning (for direct load switching)

Configuration

The Rosemount 2110 requires a minimum current of 3 mA, which continues to flow when it is ‘off’.
When selecting a relay to wire in series with the Rosemount 2110, the drop-out voltage of the relay must
be greater than the voltage generated across the relay coil when 3 mA flows through it.

Maximum inrush current: 5A (over current protected)

I maximum continuous: 500 mA

I minimum continuous: 20 mA Supply current: 3 mA nominal

Voltage drop: 6.5 V @ 24 Vdc /

Voltage drop: < 3 V

5.0 V @ 240 Vac

I load off: <3 mA I load off: <0.5 mA

19

Configuration

+V

0 V

Sig

P

L

C

<3V

3

2

1

L

U

+–

I/P

PLC

13

2

L

+–

I/P

PLC

<100 A

<3V

3

2

L

U

+–

I/P

PLC

1

+–

I/P

PLC

2

31

L

<100 A

+V

0 V

V

R

I

L

<3V

3

21

U

+V

0 V

L

<100 A

+V

0 V

3

2

1

<3V

3

2

1

U

+V 0 V

3

2

1

L

<100 A

+V

0 V

V

R

I

L

L / +V

<12 V

U

3

1

+V

0 V

N

L1

+V

0 V

N

L1

3

1

<3 mA

+V

0 V

N

L1

<12 V

U

2

1

+V

0 V

N

L1

2

1

<3 mA

= Load on

= Load off

March 2018

Table 2-2. Functions

PLC
(positive output)

PNP dc

Reference Manual

00809-0100-4029, Rev CA

Mode: dry on, high level alarm Mode: wet on, low level alarm

Load switching ac/dc

LED

Electrical load

LED on continuously

LED flashes every second

LED on continuously

LED flashes every second

Note

For direct load switching, a DPST (Double Pole, Single Throw) (on/off) switch must also be fitted for safe
disconnection of the power supply. Fit the DPST switch as near to the Rosemount 2110 as possible,
keeping the switch free of obstructions. Label the switch to indicate it is the supply disconnection device
for the Rosemount 2110.

20

Configuration

Reference Manual

Keep the fixing screw and screw seal safe

PG9 cable gland provided. Cable diameter 0.24 to 0.31 in. (6 to 8 mm)

5.9 (1.5)

00809-0100-4029, Rev CA

2.4.2 Wiring

The Rosemount 2110 meets IP66 and IP67 weatherproof ratings when correctly assembled with the
supplied connector and suitable cable. Ensure seals are in place to maintain the weatherproof ratings.

Note

Use only the connector supplied and ensure the cable gland is pointing downwards or sideways.

Wiring procedure

1. Remove the plug cover and cable gland.

Configuration

March 2018

2. Pull the cable through the cable gland.

3. Connect the cable wires.

Table 2-1 on page 19 shows the wiring connections for each electronics option.

4. Ensure proper grounding

Make sure grounding is done according to national and local electrical codes. Failure to do so may

impair the protection provided by the equipment.

Configuration

21

Configuration

A

B

B

C

C

D

A

B

D

C

C

March 2018

Reference Manual

00809-0100-4029, Rev CA

Signal cable shield grounding at power supply end

Make sure the instrument cable shield is:

 Trimmed close and insulated from touching the level switch housing.

 Connected to the next shield if cable is routed through a junction box.

 Connected to a good earth ground at the power supply end.

Figure 2-9. Cable Shield Connection (Power Supply End)

A. Trim shield and insulate C. Trim shield
B. Minimize distance D. Connect shield back to power supply ground

Signal cable shield grounding at level switch end

Make sure the instrument cable shield is:

 Trimmed close and insulated at the power supply end.

 Connected to the next shield if cable is routed through a junction box.

 Connected to the potential earth (ground) terminal.

Figure 2-10. Cable Shield Connection (Level Switch End)

A. Trim shield and insulate C. Trim shield

22

B. Minimize distance D. Connect shield back to power supply ground

Configuration

Reference Manual

Optional positions

Fork

alignment

indicator

OK

OK

00809-0100-4029, Rev CA

5. Re-fit the plug cover and tighten the cable gland.
a. The plug cover can be re-fitted in any one of four positions.

Configuration

March 2018

b. Ensure the cable gland is pointing downwards or sideways.

c. Secure the plug cover with the plug screw and washer, and tighten cable gland.

Configuration

23

Configuration

March 2018

d. If possible, arrange the wiring with a drip loop.

6. Connect the power supply when ready to apply power.

2.5 LED Indication

Reference Manual

00809-0100-4029, Rev CA

Table 2-3. LED Indication

LED flash rate Switch status

Continuous Output state is on

1 every second Output state is off

1 every 2 seconds Uncalibrated

1 every 4 seconds Load fault; load current too high; load short circuit

2 times / second Indication of successful calibration

24

3 times / second Internal fault (micro, ROM, or RAM)

Off Problem (e.g. supply)

Configuration

Reference Manual

Normal condition

Test condition

00809-0100-4029, Rev CA

Section 3 Troubleshooting

Magnetic test point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 25

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 25

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 26

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 26

Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 26

Service support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 27

3.1 Magnetic test point

A magnetic test point is marked on the side of the housing to allow a functional test of the
Rosemount

target, the level switch output will change state while the magnet is present.

™

2110 Level Switch (“level switch”) in the overall system. By touching a magnet to the

Installation

March 2018

Figure 3-1. Magnetic Test Point

3.2 Inspection

Visually examine the Rosemount 2110 and do not use if it is damaged. Check that the connector and
seals are correctly fitted, and that the connector fixing screw and gland are tight.

Ensure the LED flash rate is 1 Hz or constantly on. For anything else, see “LED Indication” on page 24.

Installation

25

Installation

March 2018

3.3 Maintenance

Figure 3-2. Maintenance

Note

Only use a soft type brush for cleaning.

Reference Manual

00809-0100-4029, Rev CA

3.4 Troubleshooting

For a malfunction, see “Troubleshooting Chart” on page 26 for possible causes.

Table 3-1. Troubleshooting Chart

Fault Symptom/indication Action/solution

No LED, no power

LED 3 flashed per second Internal failure, contact supplier

LED 1 flash every 2 seconds Uncalibrated, return to supplier

Does not switch

LED 1 flash every 4 seconds

Fork damage Replace

Thick encrustation on forks Carefully clean the fork

5 second delay on changing mode/delay Wait 5 seconds

Incorrect
switching

Faulty switching Excessive electrical noise Suppress the cause of the interference

Dry = On,
Wet = On set correctly

Check the power supply, check the load
on direct load switching electronics
model

Load fault, load current too high,
load short circuit, check installation

Check wiring in the connector­see Table 2-1 on page 19

3.5 Spare parts

See Appendix A: Reference Data for where to find the latest spares information.

26

Installation

Reference Manual

00809-0100-4029, Rev CA

3.6 Service support

To expedite the return process outside of the United States, contact the nearest Emerson™ representa­tive.

Within the United States, call the Emerson Instrument and Valves Response Center using the 1 800 654
7768 toll-free number. This center, available 24 hours a day, will assist you with any needed information
or materials.

The center will ask for product model and serial numbers, and will provide a Return Material
Authorization (RMA) number. The center will also ask for the process material to which the product was
last exposed.

Individuals who handle products exposed to a hazardous substance can avoid injury if they are
informed of, and understand, the hazard. If the product being returned was exposed to a hazardous
substance as defined by OSHA, a copy of the required Safety Data Sheet (SDS) for each hazardous
substance identified must be included with the returned goods.

Installation

March 2018

Installation

27

Installation

March 2018

Reference Manual

00809-0100-4029, Rev CA

28

Installation

Reference Manual

00809-0100-4029, Rev CA

Appendix A Reference Data

A.1 Product Certifications

To view current Rosemount™ 2110 Product Certifications,
follow these steps:

Specifications and Reference Data

March 2018

1. Go to Emerson.com/Rosemount

2. In the Products section, click Level Measurement and
then View Products.

3. Click Rosemount 2110 Level Switch - Vibrating Fork

to view the product details page.

4. Scroll as needed to the green menu bar and click
Documents & Drawings.

5. Click Manuals & Guides.

6. Select the Quick Start Guide.

.

A.2 Ordering Information,

Specifications, and
Drawings

To view current Rosemount 2110 Ordering Information,
Specifications, and Drawings, follow these steps:

1. Go to Emerson.com/Rosemount

2. In the Products section, click Level Measurement and
then View Products.

.

3. Click Rosemount 2110 Level Switch - Vibrating Fork

to view the product details page.

4. Scroll as needed to the green menu bar and click
Documents & Drawings.

5. For installation drawings, click Drawings &
Schematics and select the appropriate document.

6. For ordering information, specifications, and
dimensional drawings, click Data Sheets & Bulletins
and select the appropriate Product Data Sheet.

Specifications and Reference Data

29

Reference Manual

00809-0100-4029, Rev CA

Specifications and Reference Data

March 2018

Specifications and Reference Data

30

Global Headquarters

Emerson Automation Solutions

6021 Innovation Blvd.
Shakopee, MN 55379, USA

[phone] or [phone]
[phone]
[e-mail]

North America Regional Office

Emerson Automation Solutions

8200 Market Blvd.
Chanhassen, MN 55317, USA

[phone] or [phone]
[phone]
[e-mail]

Latin America Regional Office

Emerson Automation Solutions

1300 Concord Terrace, Suite 400
Sunrise, FL 33323, USA

[phone]
[phone]
[e-mail]

Reference Manual

00809-0100-4029, Rev CA

March 2018

Europe Regional Office

Emerson Automation Solutions

Neuhofstrasse 19a P.O. Box 1046
CH 6340 Baar
Switzerland

[phone]
[phone]
[e-mail]

Asia Pacific Regional Office

Emerson Automation Solutions

1 Pandan Crescent
Singapore 128461

[phone]
[phone]
[e-mail]

Middle East and Africa Regional Office

Emerson Automation Solutions

Emerson FZE P.O. Box 17033
Jebel Ali Free Zone - South 2
Dubai, United Arab Emirates

[phone]
[phone]
[e-mail]

Linkedin.com/company/Emerson-Automation-Solutions

Twitter.com/Rosemount_News

Facebook.com/Rosemount

Youtube.com/user/RosemountMeasurement

Google.com/+RosemountMeasurement

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