Rosemount 3491 User manual

www.rosemount.com
Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
Universal Control Unit

Reference Manual
00809-0100-4841, Rev. AA
May 2007 Rosemount 3490 Series
www.rosemount.com
Rosemount 3490 Series
Universal Control Unit
Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc.
HART is a registered trademark of the HART Communication Foundation.
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.

Reference Manual
00809-0100-4841, Rev. AA
May 2007 Rosemount 3490 Series
www.rosemount.com
Table of Contents
SECTION 1
Introduction
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Service Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
SECTION 2
Overview
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
SECTION 3
Installation
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
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Switching on the 3491/3493 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Switching-on the 3492 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
1-2
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
SECTION 5
Service and Health
Checks
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
APPENDIX A
Reference Data
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
APPENDIX B
Product Certifications
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
APPENDIX C
Menus and Parameters
Menus and parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1
APPENDIX D
Additional Features
Restoring the factory defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-1
How to restore the factory default settings . . . . . . . . . . . . . . . . . . .D-1
DIRECT Menu screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-2

Reference Manual
000809-0100-4841, Rev. AA
May 2007
1-3
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

Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
1-4

Reference Manual
00809-0100-4841, Rev. AA
May 2007 Rosemount 3490 Series
www.rosemount.com
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.
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
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
1-2
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®Transmitters

1-3
Rosemount 3490 Series
Reference Manual
00809-0100-4841, Rev. AA
May 2007
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.

Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
1-4

Reference Manual
00809-0100-4841, Rev. AA
May 2007 Rosemount 3490 Series
www.rosemount.com
Section 2 Overview
Introduction To The 3490 Series . . . . . . . . . . . . . . . . . . . . page 2-1
Control Unit Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-3
Control Unit Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-4
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.
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.
IP-rated Wall Mount NEMA4X-rated Wall Mount Panel Mount

Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
2-2
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.

Reference Manual
00809-0100-4841, Rev. AA
May 2007
2-3
Rosemount 3490 Series
CONTROL UNIT
FUNCTIONS
For a full guide to programming the Rosemount 3490 Series Control Unit, see
“Programming” on page 4-9.
Standard functions
(Models 3491/3492/3493)
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.
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.
Difference, sum and
product functions
(Model 3492)
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.
Logging functions
(Model 3493)
Model 3493 has all the standard functions listed above, and a 7000 event
logging facility.

Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
2-4
CONTROL UNIT
FRONT PANEL
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.
Figure 2-2. Front panel fascia
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.
4-line back-lit LCD display
Status LED Keypad
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.

Reference Manual
00809-0100-4841, Rev. AA
May 2007
2-5
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
Figure 2-4.
Typical display of model 3492
HART Transmitter
communicating
(Absent if idle)
Measured PV
(Primary Value)
Bar graph of
4-20mA output
Off-line/on-line status.
(Locked padlock = on-line)
Relay (RL) status.
(o = de-energized, = energized)
Digital input status
(o = de-energized, = energized)
Transmitter allocated
Left vertical bar = Tx1
Right vertical bar = Tx2
Transmitter
communicating
(1=Tx1, 2=Tx2)
Measured PV
(Primary Value)
Bar graph of
4-20mA output
Off-line/on-line status.
(Locked padlock = on-line)
Relay (RL) status.
(o = de-energized, = energized)
Digital input status
(o = de-energized, = energized)

Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
2-6
Figure 2-5.
Typical display of model 3493
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
Figure 2-6. Large PV Display
Status LED The LED is positioned just below the LCD. It flashes once per second to
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.
HART Transmitter
communicating
(Absent if idle)
Measured PV
(Primary Value)
Totaliser 1
Off-line/on-line status.
(Locked padlock = on-line)
Relay (RL) status.
o = de-energized, = energized
T = Totaliser
Totaliser 2 (Daily total)
Digital input status
o = de-energized, = energized
Full Primary Display
Large PV Display

Reference Manual
00809-0100-4841, Rev. AA
May 2007 Rosemount 3490 Series
www.rosemount.com
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.

Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
3-2
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.