Rosemount 3490 Specifications
Rosemount™ 3490 Series
4–20 mA + HART® Compatible Controller
Product Data Sheet
May 2016
00813-0100-4841, Rev DB
Field mounted controller with integral
multi-function LCD display and keypad
Tough weatherproof wall mount
enclosure for internal or external
mounting
Accepts 4–20 mA and HART inputs
Compatible with HART 7 transmitters
Intrinsically safe power supply to a
transmitter
Isolated 4–20 mA output
Five field adjustable alarm and control
relays
Pre-programmed with tank shapes, flow
algorithms, and pump control routines to
simplify configuration
Rosemount 3490 Series
Wall mount, IP65 version of the
Rosemount 3490 Series Control Unit
Wall mount, NEMA® 4X version of the
Rosemount 3490 Series Control Unit
Panel mount version of the
Rosemount 3490 Series Control Unit
Overview of the Rosemount 3490 Series
The Rosemount 3490 Series of wall and panel mounting control units
provide comprehensive control functionality for any 4–20 mA or
HART compatible transmitter. A back-lit display gives clear visual
indication of the measured value and status of all inputs and outputs.
Features and benefits
Tough weatherproof wall mount enclosure for internal and
external mounting
Accepts 4–20 mA or HART inputs
Compatible with HART 5, 6, and 7 transmitters
Five voltage-free SPDT relays for alarm and control duties
Supports two voltage-free contact closure inputs
4–20 mA 12-bit isolated current output proportional to calculated
value
May 2016
Bright local display of measured value and input/output status
Programmed tank shapes, flow algorithms, and control routines
simplify configuration. A 20-point strapping table facility is
provided for non-standard applications.
Real-time clock for energy saving routines, pump efficiency
calculations, and date/time stamping of data logging.
The Rosemount 3490 Series is mounted in a non-hazardous area,
and provides a protected (intrinsically safe) direct current supply
to a transmitter mounted in a hazardous area.
Ideal for programming and control of
Rosemount level and flow transmitters
It is ideal for programming and control of Rosemount 3100 Series
Level and Flow Transmitters, and Rosemount 3300 Guided Wave
Radar Level and Interface Transmitters (non-explosion-proof only).
Other HART transmitters can be connected. The Rosemount 3490
Series recognizes transmitters as “unknown instruments” but allows
access to programming of Universal and Common Practice HART
command.
Contents
Overview of the Rosemount 3490 Series . . . . . . . . page 2
Product Certifications . . . . . . . . . . . . . . . . . . . . . . . . page 8
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . page 4
2
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . page 9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5
EmersonProcess.com/Rosemount
May 2016
1. 572 m
12: 47
RL1
RL2
RL3
RL4
IN1
IN2
RL5
AB C D
E
F
1.572m
1.572m
12:47
1
MAIN MENU
Run?
MONITOR
SETUP
1
3490
3491
Model type:
Level or volume measurement with a
Rosemount 3490 Series Control Unit and
Rosemount 3100 Series Level Transmitter
Rosemount 3490 Series
Special features
Configured and interrogated using an integral six-button
keypad.
Easy to navigate menu structure.
Wizard assisted programming, with password protection to
prevent unauthorized access.
Many popular configurations are “Wizard assisted”, enabling
fast and accurate programming. Typical applications include
level, volume, distance measurement, and open channel flow
measurement.
The HART digital or 4–20 mA analog signal from the
transmitter may be offset, dampened, scaled, and linearized.
A range of pre-programmed linearization algorithms are
user-selectable.
The 4–20 mA output signal may be scaled to re-transmit all or
just part of the transmitter’s input signal or calculated value.
Five relays are fully field programmable to perform a variety of
control, fault indication, and alarm duties.
Typical Rosemount 3491 display
A. Online status
B. Digital communication status
C. Measured variable
Easy to navigate menu structure
D. Relay status
E. Digital input status
F. Bar graph of 4–20 mA output
Two digital inputs can be individually set-up to perform various
control actions (e.g. raise an alarm) whenever activated.
Choosing a control unit
Each Rosemount 3490 Series Control Unit has been designed for
a specific purpose:
The Rosemount 3491 Standard Control Unit accepts input
from one transmitter.
The Rosemount 3492 Differential Measurement Control Unit
accepts input from two HART transmitters and performs sum
or differential calculations, providing a single current output
proportional to the answer.
The Rosemount 3493 Logging Measurement Control Unit
provides on-board logging of the process/primary value (PV),
and totalized open channel flow.
EmersonProcess.com/Rosemount
3
Rosemount 3490 Series
May 2016
Ordering Information
Specification and selection of product materials, options, or components must be made by the purchaser of the equipment.
See page 6 for more information on Material Selection.
Table 1. Rosemount 3491, 3492, and 3492 Ordering Information
The starred options (★) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to
additional delivery lead time.
Model Product description
3491 Standard control unit
3492 Differential control unit
3493 Logging control unit
Signal output
L 4–20 mA
Power supply
1 115/230 Vac
2 24 Vdc
Enclosure / mounting
P6 Wall mounting, IP65
P7 Panel mounting, IP40
P4 Wall mounting, NEMA 4X
Product certificates
I1 ATEX Intrinsically Safe
I3 NEPSI Intrinsically Safe
(1)
I5
(1)
I6
I7 IECEx Intrinsically Safe
IM Technical Regulation Customs Union (EAC) Intrinsically Safe
USA Intrinsically Safe
CSA Intrinsically Safe
Typical model number: 3491 L 1 P4 I5
★
★
★
★
★
★
★
★
★
★
★
★
1. Enclosure/mounting codes P4 or P7 are required for this option.
Accessory
Table 2. Accessory Ordering Information
The starred options (★) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to
additional delivery lead time.
Accessory
03490-7001-0001 IP65 hood kit for panel-mountable control unit (P7 option in Table 1)
4
EmersonProcess.com/Rosemount
★
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