Rosemount 3491, 3492, 3493 Reference Manual
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
Universal Control Unit
www.rosemount.com
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
Rosemount 3490 Series
Universal Control Unit
NOTICE
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.
Within the United States, Rosemount Inc. has two toll-free assistance numbers.
Customer Central: 1-800-999-9307(7:00 a.m. to 7:00 p.m. CST)
Technical support, quoting, and order-related questions.
North American Response Center:
Equipment service needs.
1-800-654-7768 (24 hours a day – Includes Canada)
For equipment service or support needs outside the United States, contact your local
Rosemount representative.
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 Rosemount
Sales Representative.
This device complies with part 15 of the FCC rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.
Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc.
HART is a registered trademark of the HART Communication Foundation.
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Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
Table of Contents
SECTION 1
Introduction
SECTION 2
Overview
SECTION 3
Installation
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Introduction To The 3490 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Summary of Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Two mounting options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Transmitter input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Control functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Control Unit Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Standard functions (Models 3491/3492/3493) . . . . . . . . . . . . . . . . 2-3
Difference, sum and product functions (Model 3492). . . . . . . . . . . 2-3
Logging functions (Model 3493) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Control Unit Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Before You Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
General considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Mounting the Rosemount 3490 Series Control Unit . . . . . . . . . . . . . . 3-3
Mounting the IP-rated Wall Mount Models . . . . . . . . . . . . . . . . . . . 3-3
Mounting the
NEMA 4X-rated Wall Mount Models. . . . . . . . . . . . . . . . . . . . . . . . 3-3
Mounting Panel Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Electrical Connections on Wall Mount Models . . . . . . . . . . . . . . . . 3-6
Electrical connections on Panel Mount Model . . . . . . . . . . . . . . . . 3-8
Transmitter Connections and Cabling . . . . . . . . . . . . . . . . . . . . . . 3-9
Connecting HART Transmitters to 3492. . . . . . . . . . . . . . . . . . . . 3-10
Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Earthing Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Relay Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Current Output Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Digital Control Voltage free Contact Inputs . . . . . . . . . . . . . . . . . 3-12
RS232 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
SECTION 4
Getting started
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Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Switching on the 3491/3493 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Switching-on the 3492 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Rosemount 3490 Series
The Hierarchical menu system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
How to navigate the menu system . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
About parameter screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Before you begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Comfort (system) settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Transmitter inputs
to the 3490 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Profile Calculations for Contents and Flow Applications . . . . . . . 4-23
Digital Inputs IN1 and IN2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33
Logging (3493 Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
Current Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38
Relays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39
About Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-59
About Totalising On Model 3491 . . . . . . . . . . . . . . . . . . . . . . . . . 4-62
About Totalising on Model 3492 . . . . . . . . . . . . . . . . . . . . . . . . . . 4-63
About Totalising on Model 3493 . . . . . . . . . . . . . . . . . . . . . . . . . . 4-64
Totalising examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-67
Primary Display Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-71
Serial Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73
PIN Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-74
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May 2007
SECTION 5
Service and Health
Checks
APPENDIX A
Reference Data
APPENDIX B
Product Certifications
APPENDIX C
Menus and Parameters
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Health Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Health Check: 3490 Series Control Unit. . . . . . . . . . . . . . . . . . . . . 5-2
Health Check: Rosemount 3102/3105 Series transmitters. . . . . . . 5-8
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Model Code 3491, Standard Control Unit. . . . . . . . . . . . . . . . . . . . A-6
Model Code 3492, Differential Control Unit . . . . . . . . . . . . . . . . . . A-7
Model Code 3493, Logging Control Unit . . . . . . . . . . . . . . . . . . . . A-8
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
European Directive Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Hazardous Locations Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
ATEX Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Underwriters Laboratories Inc. (UL) Approvals . . . . . . . . . . . . . . . B-3
Canadian Standards Association (CSA) Approvals . . . . . . . . . . . . B-4
IECEx Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Approval Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Menus and parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
APPENDIX D
Additional Features
1-2
Restoring the factory defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
How to restore the factory default settings . . . . . . . . . . . . . . . . . . .D-1
DIRECT Menu screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-2
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May 2007
Rosemount 3490 Series
APPENDIX E
Support for HART®
Transmitters
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1
Fully Supported Transmitters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1
Universal and Common Practice Commands . . . . . . . . . . . . . . . . . . . E-1
Universal Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1
Common Practice commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2
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May 2007
Rosemount 3490 Series
Section 1 Introduction
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2
Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-3
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 warning symbol ( ). 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.
• Make sure only qualified personnel perform the installation.
• Use the equipment only as specified in this manual. Failure to do so may
impair the protection provided by the equipment.
Explosions could result in death or serious injury.
• Verify the operating environment of the Rosemount 3490 Series Control Unit is
consistent with the appropriate locations certifications.
Electrical shock could cause death or serious injury.
• Use extreme caution when making contact with the leads and terminals.
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Any substitution of non-recognized parts may jeopardize safety. Repair, e.g. substitution
of components etc., may also jeopardize safety and is under no circumstances allowed.
Reference Manual
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Rosemount 3490 Series
May 2007
MANUAL OVERVIEW This manual provides installation, configuration and maintenance information
for the Rosemount 3490 Series Control Unit.
Section 2: Overview
Section 3: Installation
Section 4: Getting Started
Section 5: Service and Health Checks
Appendix A: Reference Data
Appendix B: Product Certifications
Appendix C: Menus and Parameters
Appendix D: Additional Features
Appendix E: Support for HART
®
Tra nsmitt ers
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Rosemount 3490 Series
SERVICE SUPPORT To expedite the return process outside of the United States, contact the
nearest Rosemount representative.
Within the United States, call the Rosemount National Response Center using
the 1-800-654-RSMT (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.
Rosemount National Response Center representatives will explain the
additional information and procedures necessary to return goods exposed to
hazardous substances. This 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 Material
Safety Data Sheet (MSDS) for each hazardous substance identified must be
included with the returned goods.
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May 2007
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Section 2 Overview
Introduction To The 3490 Series . . . . . . . . . . . . . . . . . . . . page 2-1
Control Unit Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-3
Control Unit Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-4
Rosemount 3490 Series
INTRODUCTION TO THE
3490 SERIES
The Rosemount 3490 Series is a range of control units, providing a wide
range of control functions and display of the measured variable.
Summary of Features • Full support for Rosemount 3100 Series ultrasonic transmitters.
• Intrinsically Safe power supply to transmitters.
• 4-line LCD display with back light - for text and graphics.
• 6-button keypad - for local interrogation and programming.
• Intuitive menu system.
• 4-20mA / HART input.
• Two digital inputs.
• 5 relay outputs.
• Isolated 4-20mA output.
• LED indicator for system health.
Two mounting options There are two mounting versions of the control unit available:
• Wall mounted.
• Panel mounted.
The wall mounting version has a tough rated housing for installation indoors
or outdoors, whilst the panel mounting version is for installation in a control
room panel/cabinet.
Figure 2-1. The Rosemount
3490 Series range.
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IP-rated Wall Mount
There are two housing styles for the wall mounted option:
• IP-rated Wall Mount.
• NEMA4X-rated Wall Mount.
The panel mounting option has a black housing.
NEMA4X-rated Wall Mount
Panel Mount
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Rosemount 3490 Series
May 2007
Transmitter input The Control Unit will accept input from a 4-20mA / HART transmitter.
Model 3492 will accept inputs from two HART transmitters.
NOTE
The Rosemount 3490 Series is designed for non-hazardous (safe) area
installation, but can be connected to a transmitter installed in a hazardous
area. For certifications of the Control Unit, see Appendix B.
Control functionality Control functionality is provided by five SPCO voltage-free contact relays in
the control unit. There is also an isolated 4-20mA signal output.
For applications where the functionality of the control unit is linked to other
external events, the two digital input ports will accept contact closure signals.
Front Panel The Rosemount 3490 Series is programmed simply using the 6-button
membrane keypad on the front panel. Menu structured programming is
employed, with the display assisting the user with dynamic help text.
A full specification for the control unit is in Appendix A.
2-2
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May 2007
Rosemount 3490 Series
CONTROL UNIT
FUNCTIONS
Standard functions
(Models 3491/3492/3493)
For a full guide to programming the Rosemount 3490 Series Control Unit, see
“Programming” on page 4-9.
Using either the input from a 4-20mA or HART transmitter, all models of the
3490 Control Unit will provide the following standard functions:
• Calculation and display of the 3490’s primary variable (PV).
The user can choose this to be the reading coming from the transmitter,
which may be any measurement. For example, the Rosemount 3100
Series of transmitters can measure the liquid level or distance-to-surface,
or calculate tank content or flow rate in an open channel structure
e.g. a flume or weir. A totaliser function is included.
The Control Unit is pre-programmed with standard volumetric and flow
equations to convert a level signal into contents or flow, and also has a
20-point user-programmable look-up table for non-standard applications.
• Output a 4-20mA signal.
The 4-20mA output is usually proportional to the displayed PV, and is
displayed in bargraph form (0% to 100%).
• Relay control functions.
There are five freely assignable relays. Relay 5 is a fault relay by default,
which may be assigned to control duty if required. The other relays are
available for the user to set them to operate at chosen values of the
displayed PV, or other calculated values.
Difference, sum and
product functions
(Model 3492)
Logging functions
(Model 3493)
The control unit is pre-programmed with a selection of popular pump
control routines for wet well and sump control, along with energy saving
overrides.
• Voltage-free (digital) contact close input.
Up to two voltage-free contact closure inputs may be connected, allowing
external override of control functions if desired.
• Programming a transmitter using the control unit
When a Rosemount 3100 or 3300 Series HART transmitter is connected,
the 3490 will recognize the transmitter, allow selection of variables to be
processed, and allow full access to and programming of the transmitter
configuration parameters, eliminating the need for any other HART
programming device.
Any other HART transmitter can be connected to the 3490 - in this case
the 3490 will recognize the transmitter as an "unknown instrument" and
will allow access to and programming of the Universal and Common
Practice HART commands.
Model 3492 has all the standard functions listed above, and extra functions
for calculating the difference, sum, or product of two separate inputs from
HART transmitters.
Model 3493 has all the standard functions listed above, and a 7000 event
logging facility.
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Rosemount 3490 Series
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May 2007
CONTROL UNIT
FRONT PANEL
Figure 2-2. Front panel fascia
This section describes the front panel fascia, which comprises keypad,
display, and status LED.
NOTE:
A full specification for the control unit is in Appendix A.
4-line back-lit LCD display
Status LED
Keypad
Keypad The membrane keypad comprises 6 function buttons. They are used for
navigating a hierarchical menu system and for viewing/editing application
parameters. A summary of each button function is provided below.
Button What the button will do
When the Primary Display is shown, press the red (ENTER) button to access the
Hierarchical Menu System. At other times, this button is for selecting a menu
option and for confirming an edited parameter value or option.
When navigating the menu system, the UP-ARROW button is for moving upwards
one line. At other times, this button is for scrolling up through a list of alphanumeric
characters or a multiple-choice list of options.
When navigating the menu system, the DOWN-ARROW button is for moving
downwards one line. At other times, this button is for scrolling down through a list
of alphanumeric characters or a multiple-choice list of options.
The LEFT-ARROW button is for moving left e.g. to another character when editing
a parameter value.
The RIGHT-ARROW button is for moving right e.g. to another character when
editing a parameter value.
When navigating the menu system, the ESCAPE button will return you to the
previous menu level and the Full Primary Display.
At other times, e.g. editing a parameter, it is for restoring a parameter value/option
to the setting prior to when editing started.
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Rosemount 3490 Series
Display The LCD display shows both text and graphical information. After the
power-up and self-checks are completed, the Primary Display is presented.
The default display typically features a digital clock, measured variable with
display units, and status icons.
There are some display differences between the models:
• On models 3491 and 3492, a bar graph represents the 4-20mA output
signal. (Model 3493 display can be programmed to show the bar graph.)
• On model 3492, there are extra graphics relating to having two
transmitters connected to the control unit.
• On model 3493, there are two totalisers displayed; one above and one
below the measured variable.
Figure 2-3.
Typical display of model 3491
Off-line/on-line status.
(Locked padlock = on-line)
Digital input status
(o = de-energized,
= energized)
Figure 2-4.
Typical display of model 3492
Transmitter allocated
Left vertical bar = Tx1
Right vertical bar = Tx2
Off-line/on-line status.
(Locked padlock = on-line)
HART Transmitter
communicating
(Absent if idle)
Bar graph of
4-20mA output
Measured PV
(Primary Value)
Transmitter
communicating
(1=Tx1, 2=Tx2)
Relay (RL) status.
(o = de-energized,
Relay (RL) status.
(o = de-energized,
= energized)
= energized)
Digital input status
(o = de-energized,
= energized)
Bar graph of
4-20mA output
Measured PV
(Primary Value)
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Rosemount 3490 Series
Figure 2-5.
Typical display of model 3493
Reference Manual
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May 2007
Off-line/on-line status.
(Locked padlock = on-line)
Digital input status
o = de-energized,
= energized
Figure 2-6. Large PV Display
HART Transmitter
communicating
(Absent if idle)
Totaliser 1
After a period of keypad inactivity, the display automatically changes to the
Large PV Display. This shows only the Primary Value (PV) and Display units,
but in a larger character size to facilitate easier viewing.
To restore the Full Primary Display, press the red (ENTER) button.
NOTE:
If you do not require the Large PV Display feature, it can be switched off using
parameter P574. See also “Primary Display Options” on page 4-72
Large PV Display
Totaliser 2 (Daily total)
Measured PV
(Primary Value)
Relay (RL) status.
o = de-energized,
T = Totaliser
= energized
Status LED The LED is positioned just below the LCD. It flashes once per second to
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Full Primary Display
indicate that the Control Unit and Transmitters are operating correctly. If there
are operating system difficulties (e.g., overheating) or a transmitter fault, the
LED is constantly on.
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May 2007
Rosemount 3490 Series
Section 3 Installation
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1
Before You Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-2
Mounting the Rosemount 3490 Series Control Unit . . . . page 3-3
Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-6
SAFETY MESSAGES Procedures and instructions in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
raises potential safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.
Explosions could result in death or serious injury:
Verify that the operating environment is consistent with the appropriate locations
certifications (see Appendix B).
Do not remove the housing cover in explosive atmospheres when the circuit is alive.
Failure to follow safe installation and servicing guidelines could result in death or
serious injury:
Make sure only qualified personnel perform the installation.
Use the equipment only as specified in this manual. Failure to do so may impair the
protection provided by the equipment.
Do not perform any service other than those contained in this manual unless you are
qualified.
High voltage that may be present on leads could cause electrical shock:
Avoid contact with leads and terminals.
Make sure the main power to the Rosemount 3490 Series is off, and the lines to any
other external power source are disconnected or not powered while wiring.
www.rosemount.com
Reference Manual
00809-0100-4841, Rev. AA
Rosemount 3490 Series
May 2007
BEFORE YOU INSTALL The Rosemount 3490 Series Control Unit may be connected to a transmitter
located in a hazardous area. The Control Unit must not itself be located in a
hazardous area.
General considerations • Do not mount the Control Unit on a structure that is subject to vibration, or
in a position where damage may be caused by impact, thermal stress or
liquid ingress.
• The fuse must only be replaced with the type specified.
• If the equipment is likely to come into contact with aggressive substances,
it is the responsibility of the user to take suitable precautions that prevent
it from being adversely affected, thus ensuring that the type of protection
is not compromised.
Aggressive Substances - e.g. acidic liquids or gases that may attack
metals or solvents that may affect polymeric materials.
Suitable Precautions - e.g. regular checks as part of routine inspections or
establishing from the material's data sheet that it is resistant to specific
chemicals.
• The user should not repair this equipment.
• Terminal 30 (Intrinsically Safe Earth) of the Control Unit must be
connected to a High Integrity Earth.
• A mains powered Control Unit must not be connected to a supply
exceeding 250V r.m.s. or dc, or to apparatus containing a source of
voltage exceeding 250V r.m.s. or dc.
• A dc powered Control Unit must not be connected to a supply exceeding
30V dc, or to apparatus containing a source of voltage exceeding 30V dc.
• The Intrinsically Safe outputs of the Control Unit may be connected to
certified equipment used in a hazardous area. Refer to Appendix B for
details of relevant certifications.
• Refer to the technical data in Appendix A.
3-2
Reference Manual
00809-0100-4841, Rev. AA
May 2007
MOUNTING THE
ROSEMOUNT 3490
SERIES CONTROL UNIT
Rosemount 3490 Series
Mounting the IP-rated
Wall Mount Models
Mounting the
NEMA 4X-rated Wall
Mount Models
Guidelines:
• This housing is rated IP65. It is suitable for mounting outside, but this
should be above any flood level, away from any overflow path, and away
from direct sunlight.
• Do not mount the Control Unit on a structure that is subject to vibration, or
in a position where damage may be caused by impact, thermal stress, or
liquid ingress.
• The mass of the mains powered unit is 1.4 kg, and the DC powered unit is
1.0 kg. To conform with safety requirements, the wall on which the unit is
mounted should be capable of supporting 4 times this weight.
• It is not necessary, or advisable, to remove the upper part of the unit
housing that contains the LCD and keypad. There are no user serviceable
parts inside. The unit must not be modified in any way.
Procedure:
a) Mount the unit on a suitable wall or structure using the fixing points shown
on Figure A-1 in Appendix A.
b) For electrical connections, see “Electrical Connections on Wall Mount
Models“ on page 3-6.
Guidelines:
• This housing is rated NEMA 4X. It is suitable for mounting outside, but this
should be above any flood level, away from any overflow path, and away
from direct sunlight.
• Do not mount the 3490 Series Control Unit on a structure that is subject to
vibration, or in a position where damage may be caused by impact,
thermal stress, or liquid ingress.
• The mass of the mains powered unit is 3.5 kg, and the DC powered unit is
3.1 kg. To conform with safety requirements, the wall on which the unit is
mounted should be capable of supporting 4 times this weight.
• It is not necessary, or advisable, to remove the upper part of the unit
housing that contains the LCD and keypad. There are no user serviceable
parts inside. The unit must not be modified in any way.
• The 3490 Series Control Unit is not supplied with cable entries for
connections to the field mounted transmitter or the mains power supply.
Model 3493 has a download socket factory pre-fitted.
• It is the responsibility of the user to ensure that cable glands and
connection to the 3490 Series Control Unit are in accordance with the
local or national standards. To maintain the type 4X rating of the
enclosure, type 4X connections must be used.
Procedure:
a) Mount the unit on a suitable wall or structure using the fixing points shown
in Figure A-2 (Appendix A).
b) For electrical connections, see “Electrical Connections on Wall Mount
Models“ on page 3-6.
3-3
Rosemount 3490 Series
Mounting Panel Models Guidelines:
• This housing is rated IP40 and is designed for panel mounting in a
weatherproof environment. An optional fascia overlay hood is available
which improves the IP rating to IP65.
• Do not mount the Control Unit on a structure that is subject to vibration, or
in a position where damage may be caused by impact, thermal stress, or
liquid ingress.
• A rack mounting kit is available that allows mounting of the unit in a
standard 19-inch rack. Up to two units can be mounted in one rack; each
unit requires a rack mounting kit.
Where three of more units are fitted in the same cabinet or panel, ensure
that there is adequate air circulation to aid cooling. It is recommended that
an air circulation fan be fitted.
• The unit requires at least 165mm clearance behind the mounting panel to
avoid cable fouling.
• Once mounted, all wiring is made at the rear of the unit using the two part
terminal blocks provided. (On model 3493, a pre-wired data download
socket suitable for front panel mounting is provided with the unit.)
• Mount the control unit on a panel with thickness 1.5mm to 10mm,
ensuring the panel is strong enough to support the 1.2kg weight of the
control unit.
• Ensure there is enough clearance behind the chosen position in the panel
(165mm minimum), cut a slot 138mm long by 68mm high (i.e. landscape
or horizontal slot) in the panel and remove any rough edges.
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Procedure:
a) Unpack the two screw clips provided.
b) Identify the moulded lugs in the moulded recesses on each side of the
control unit. (Ignore the recesses on the top and bottom of the control
unit).
c) Holding the screwdriver-slot-end of the threaded spindle of a screw
clamp and looking at the rear of the control unit, locate the screw clamp
frame on the side of the control unit. See how the 4 steel lugs of the
screw clamp frame locate on the moulded lugs of the control unit.
d) Now gently pull the screw clamp such that the lugs engage with each
other (see Figure 3-1 on page 3-5).
e) Remove the screw clamps from both the screw clamp frames.
f) Slide the control unit into the panel, ensuring that the panel seal provided
is in place behind the front panel bezel.
g) Re-fit the screw clamps, one on each side, and tighten with a screwdriver
to clamp the control unit against the panel.
h) For electrical connections, see.“Electrical connections on Panel Mount
Model“ on page 3-8.
3-4
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Figure 3-1. Screw clamp fitted
Rosemount 3490 Series
Screw clamp frame
Front panel bezel
Screw clamp with
threaded spindle
3-5
Rosemount 3490 Series
ELECTRICAL
INSTALLATION
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Electrical Connections
on Wall Mount Models
All field wiring connections are accessible by removing the lower terminal
cover, which is secured by two screws on the IP-rated version, and by four
screws on the NEMA 4X rated version.
NOTE:
It is the responsibility of the installer to:
• Refer to safety data and electrical specifications in Appendix A.
• Refer to Product Certifications and Control Drawings in Appendix B
• Check and obtain any hazardous area work permits required before
applying power to the control unit.
• Observe all local regulations and approval requirements.
• Ensure the wiring is suitable for the load current.
• Ensure wiring insulation is suitable for the voltage, temperature, and
environment of the installation.
Never remove or modify the mechanical barriers separating the terminal area
from the main enclosure, and separating the transmitter input terminals from
other terminals.
Figure 3-2 shows the layout of the external connection terminals. All of the
terminal blocks are suitable for wires 14 to 26 AWG (0.5mm
except the mains terminals which are suitable for wires 10 AWG (2.5mm
Insulation should be stripped back
1
/4” (7mm).
2
to 1.5mm2),
2
).
NOTE:
For field wiring, use 167°F (75°C) copper conductors only.
Cable gland notes for IP-rated Wall Mount
Two cable glands, rated IP65 and suitable for cable with outside diameter
4mm to 7mm, are supplied for use with the mains supply and transmitter
cable. M20 blanking plugs are supplied for the other three cable entry
positions.
All glands and blanking plugs are supplied in a plastic bag. The installer must
fit these, or suitable equivalents, in place of the transit red-caps, to ensure
weatherproofing of the control unit.
Note that the white sealing washers supplied with the cable glands and
blanking plugs must be fitted on the outside of the enclosure under
gland/blanking plug.
It is the responsibility of the user to ensure suitable cable glands or conduit
connections are used when wiring to the control unit to maintain enclosure
integrity.
The five cable-entry positions are pre-drilled to accept M20 cable glands.
Model 3493 has a data download socket factory pre-fitted in one of these
cable-entry positions.
3-6
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Figure 3-2.
Connection terminals layout
(mains powered wall mount unit)
Rosemount 3490 Series
Cable gland and conduit notes for NEMA4X-rated Wall Mount
It is the responsibility of the user to ensure suitable cable glands or conduit
connections are used when wiring to the 3490 Series Control Unit to maintain
the enclosure integrity.
Protective earth cables must be connected to at least one of the bonding
points on the inside of the enclosure. Bonding between conduit entries is not
automatic and must be provided as part of the installation.
Model 3493 has a data download socket factory pre-fitted.
NOTE:
In Intrinsically Safe systems, apparatus connected to the 3490 Series Control
Unit must not be supplied from a voltage greater than 250V r.m.s. or 250V dc.
Table 3-1. Connection
descriptions for wall mount unit
456
1
2 3
24V
I
in
(DC powered version has slightly different layout i.e. terminals 31 and 32 replace terminals 28 and 29).
RX TX
0V
24V
789
10 11 12
1316141715
I
out
0V
NO COM NC
0VIN2IN1
18
NCCOMNO
1922202321
NO COM NC
24
NCCOMNO
25 26 27
NO COM NC
28
29 30
N
IS EARTH
FUSE 200mA (T)
L
Transmitter connections are on the left side of the terminals enclosure.
The Intrinsically Safe Earth (terminal 30) must be connected to a
High Integrity Earth if the transmitter connected to terminals 1 and 2 is sited in
a hazardous area.
Ter minal Function Layout
1 Loop supply 24V
2 Current input Iin
3 Cable screen Earth (Earth symbol)
4-6 RS232 RX-TX-0V
7-9 Current output 24V-Iout-0V
10-12 Digital input 1 and 2 IN1-IN2-0V
13-15 Relay 1 NO-COM-NC
16-18 Relay 2 NO-COM-NC
19-21 Relay 3 NO-COM-NC
22-24 Relay 4 NO-COM-NC
25-27 Relay 5 NO-COM-NC
(1)
28-29
30 I.S. Earth (Earth symbol)
(2)
31
(2)
32
(1) Mains powered control unit only.
(2) DC powered control unit only.
Mains input L-N
Negative Positive +
3-7
Rosemount 3490 Series
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Electrical connections
on Panel Mount Model
Figure 3-3.
Connection terminal layout
(mains powered panel unit)
All connections are made to the rear of the control unit using the two part
terminal connectors provided.
NOTE
It is the responsibility of the installer to:
• Refer to safety data and electrical specifications in Appendix A.
• Refer to Product Certifications and Control Drawings in Appendix B
• Observe all local regulations and approval requirements.
• Check and obtain any hazardous area work permits required before
applying power to the control unit.
• Ensure the wiring is suitable for the load current.
• Ensure wiring insulation is suitable for the voltage, temperature, and
environment of the installation.
Table 3-2. Connection
descriptions for panel mount unit
3-8
(DC powered version has slightly different layout i.e. terminals 31 and 32 replace terminals 28 and 29).
Transmitter connections are on the left side of the terminals enclosure.
The Intrinsically Safe Earth (terminal 30) must be connected to a
High Integrity Earth if the transmitter connected to terminals 1 and 2 is sited in
a hazardous area.
Ter minal Function Layout
1 Loop supply 24V
2 Current input Iin
3 Cable screen Earth (Earth symbol)
4-6 RS232 RX-TX-0V
7-9 Current output 24V-Iout-0V
10-12 Digital input 1 and 2 IN1-IN2-0V
13-15 Relay 1 NO-COM-NC
16-18 Relay 2 NO-COM-NC
19-21 Relay 3 NO-COM-NC
22-24 Relay 4 NO-COM-NC
25-27 Relay 5 NO-COM-NC
(1)
28-29
Mains input L-N
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
Ter minal Function Layout
30 I.S. Earth (Earth symbol)
(2)
31
(2)
32
(1) Mains powered control unit only.
(2) DC powered control unit only.
Negative Positive +
Transmitter Connections
and Cabling
Connection of a transmitter to the control unit does not confer Intrinsic Safety
on the transmitter. It is the responsibility of the user to ensure any transmitter
installed in a hazardous area is suitable for use and certified accordingly. The
installation should be in accordance with a recognised code of practice.
Check the parameters of the installed system of control unit, transmitter, any
loop-powered devices, and interconnecting cable to ensure compliance with
the product certificates and technical data (Appendix A and Appendix B).
Particular attention must be given to the cable and the transmitter to ensure
that the total capacitance and inductance limits stated in the technical data in
Appendix B are not exceeded.
Cable joins are allowable in cabling the transmitter, provided that the joint is
made within an IP20/NEMA 3 (minimum) enclosure suitable for the
environment, and that wiring withstands a test voltage of 500V r.m.s. to earth.
The maximum length of cable permissible between the transmitter and control
unit is determined by limits imposed by the Intrinsic Safety certificates of the
instruments and Control Drawings.
No other outputs from the control unit must be routed through a hazardous
area unless protected by an additional I.S. Barrier (not supplied).
It is the responsibility of the user to ensure that any transmitter is installed in
accordance with the manufacturer’s instructions supplied with the transmitter.
Cable between the 3490 Series Control Unit and the transmitter should be
shielded twisted-pair with the shield connected to terminal 3 (marked with
earth symbol) on the 3490 Series Control Unit. The shield should be left
unconnected at the transmitter unless there is a terminal specifically provided
for this purpose.
Figure 3-4.
Loop-powered transmitter
connections to 3490 Series
Control Unit
Cable runs should be separate from any high voltage or mains cables to avoid
crosstalk or interference.
Multi-core cable may be used, provided that other cores carry only low
voltage (24V dc nominal) signals and each pair of cores is individually
shielded.
Loop-powered transmitters must be connected to terminals 1 - 3 (Figure 3-4).
(Control Unit)
24V
Iin
2
(Transmitter)
1
3
The 3490 Series Control Unit is able to provide 24V dc to a transmitter with a
max load of 25mA. Separately powered transmitters must be connected to
terminals 2 - 3 as shown in Figure 3-5
3-9
Rosemount 3490 Series
Figure 3-5.
self-powered transmitter
connections to 3490 Series
Control Unit
NOTE:
The plug/socket connectors are polarized to prevent inter-changeability and
incorrect connection
(Control Unit)
24V
Iin
Reference Manual
00809-0100-4841, Rev. AA
May 2007
1
2
(Transmitter)
3
Connecting HART
Transmitters to 3492
Figure 3-6. Connecting HART
transmitters to 3492
Model 3492 of the Rosemount 3490 Series takes the input from two HART
transmitters and will perform various calculations to create the sum,
difference, or product of the two inputs.
NOTE
The transmitters must be HART compatible for the 3492 to operate correctly.
Connection of the transmitters to the 3492 may be by cabling both transmitter
cables into the 3492 (Figure 3-6), or may be on a single cable with the two
transmitters connected to this cable via a suitable junction box (Figure 3-6).
Junction
Tx1
1
2
3
1
2
3
Box
Tx2
For correct operation, each transmitter must be changed to “multi-drop” mode
so that they can communicate with the 3492 through a common connection.
Each transmitter must therefore have it’s poll address changed from the
factory default address of “0” to a unique address.
Tx1
Tx2
3-10
The 3492 is used to achieve this address change, but requires the
transmitters be connected in a specific sequence as detailed here:
a) With the power supply turned off, connect the first transmitter to
terminals 1-3 on the 3492.
b) Check that the power-selector-switch is set for the correct voltage
(115 or 230V ac) on the mains unit, and then turn the power on.
c) The 3492 will detect the transmitter and automatically change the poll
address of the transmitter from “0” to “1”. This transmitter will also be
automatically allocated to Channel 1 of the 3492.
Note that the 3492 may also offer the user the opportunity to set the
Bottom Reference of the transmitter at this point, which may be done or
ignored by pressing the ESC button.
Reference Manual
00809-0100-4841, Rev. AA
May 2007
d) Turn the power supply off and connect the second transmitter, either at
the same terminals 1-3 as the first transmitter or at the junction box, such
that both transmitters are now connected.
e) Turn the power supply on. The 3492 will once again search for and detect
connected transmitters. After the second transmitter is found, the 3492
will automatically change the poll address from “0” to “2”. The second
transmitter will also be automatically allocated to Channel 2 of the 3492.
Note that the 3492 may also offer the user the opportunity to set the
Bottom Reference of the transmitter at this point, which may be done or
ignored by press the ESC button.
Rosemount 3490 Series
Power Connections If the 3490 Series Control Unit is powered by mains AC power, select the AC
voltage as 115V or 230V using the voltage-selector slide switch.
If the 3490 Series Control Unit is DC powered, ensure the supply is adequate
(15 - 30V dc). Do not exceed 30V dc.
A switch or circuit breaker should be installed in close proximity to the
instrument, and labelled as such.
Although the 3490 Series Control Unit meets all European standards for
surge immunity on power and signal lines, it is recommended that lightning
suppressors, such as made by Telematic Limited, are fitted if local conditions
make this advisable.
Earthing Connections The IP-rated Rosemount 3490 Series of Control Units are double insulated
and DO NOT require a mains earth.
DO NOT connect a mains earth to terminal 30.
Terminal 30 is provided for use as an Intrinsically Safe (or functional) earth
connection, which MUST be used when a transmitter is mounted in a
hazardous area and is connected to terminals 1 and 2.
Terminal 3 is to be used for connection of the shield of the twisted-pair
transmitter cable when the 3490 Series Control Unit is powering the
transmitter (as in Figure 3-4 on page 3-9). Note that this shield should be left
unconnected at the transmitter end unless there is a terminal provided for this
purpose.
On the NEMA4X-rated Control Unit, protective earth cables must be
connected to at least one of the bonding points on the inside of the enclosure.
Bonding between conduit entries is not automatic and must be provided as
part of the installation.
When connected to equipment located in a hazardous area, not meeting the
requirements of clause 6.3.12 (Isolation of circuits from earth or frame) in IEC
60079-11:2006 (EN 60079-11:2007), equipotential earthing must be ensured
between the equipment and the intrinsically safe earth. An example of
equipotential earthing is a cable with a cross sectional area greater than
2
4mm
and a resistance of less than 1ohm.
3-11
Reference Manual
00809-0100-4841, Rev. AA
Rosemount 3490 Series
May 2007
Relay Connections The 5 voltage-free contact relays are grouped in the following configuration:
Table 3-3.
Relay configuration groups
3490 Series Control Unit (Wall Mount) 3490 Series Control Unit (Panel Mount)
Relay 1 and 2 : Group 1 Relay 1, 2 and 3 : Group 1
Relay 3 and 4 : Group 2 Relay 4 and 5 : Group 2
Relay 5 - Group 3
The relay NO-COM-NC labels represent the relay terminals in the
de-energised state.
NOTE:
Whilst each relay is individually double-insulated, their arrangement is such
that the insulation between relays in the same group is standard or ‘basic’
insulation.
NOTE:
Care must be taken in order to avoid the risk of electric shock. It is
allowed to use relays in the same group to control circuits with both mains and
dc, or low voltage circuits.
Current Output
Connections
Figure 3-7.
Alternative Current Output
configurations
Digital Control Voltage
free Contact Inputs
Figure 3-8. Connections for
external trigger input
The Current Output may be connected in internally-powered mode or
loop-powered mode, as shown in Figure 3-7.
In loop-powered mode, an external power source is required. A minimum of
2.5V is required across terminals 7 and 8 for correct operation. The external
voltage must not be more than 30V dc.
24V
7
Io
8
0V
9
Internally Powered Loop Powered
+
Load
-
24V
0V
7
+
External
Supply
Io
8
+
Load
-
-
9
There are 2 trigger inputs, IN1 and IN2. The digital trigger input is connected
as shown in Figure 3-8.
3-12
External
Contact
Closure
IN
or10 11
0V
12
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