Rosemount 3490 Universal Control Unit
Starting at $1,541.65

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  • IS Power Supply to transmitter
  • 4-20mA / HART input
  • Isolated 4-20mA output
  • Five Control relays
  • Multi-function back lit display
  • NEMA4X or IP65 enclosure for wall or panel mount
  • Pre-programmed linearization - volume and open channel flow

This product is an accessory for the following products:

Rosemount 2051C Differential and Gauge Pressure Transmitter
Versatile pressure transmitter with flexible Coplanar platform to meet all pressure, level, and flow needs
Rosemount 2051L Liquid Level Transmitter
Flange mounted liquid level transmitter for precise level and specific gravity measurement up to 300 psi
Rosemount 2051T Pressure Transmitter
Absolute or gauge pressure measurements to 10,000 psi with advanced capabilities designed to meet a wide range of applications
Rosemount 2088 Absolute and Gauge Pressure Transmitter
Accurate, stable, and reliable pressure measurement at a great price
Rosemount 2090F Sanitary Absolute and Gauge Pressure Transmitter
Sanitary absolute and gauge pressure transmitters for food and pharmaceutical industries
Rosemount 2090P Pulp and Paper Pressure Transmitter
Lightweight, compact, rugged transmitter ideal for the pulp and paper industries
Rosemount 2110 Liquid Level Switch
Vibrating fork liquid point level switch with performance unaffected by flow, turbulence, bubbles, foam, vibration, or solids content
Rosemount 2120 Liquid Level Switch
Vibrating short fork liquid point level switch with four switching functions
Rosemount 3051C Smart Pressure Transmitter
Flexible Coplanar platform up to 4000 psi with 4-20mA HART protocol, Profibus, FOUNDATION fieldbus, or wireless output
Rosemount 3051L Liquid Level Transmitter
Precision level and specific gravity measurement for a wide variety of tank configurations
Rosemount 3051SHP High Static Differential Pressure Transmitter
Transmitter designed for harsh production conditions and that can withstand static pressures up to 15,000 psi
Rosemount 3051T Pressure Transmitter
Versatile gauge or absolute pressure transmitter with unmatched long-term stability and reliability
Rosemount 3100 Series Ultrasonic Level Transmitter
Liquid level transmitter based on ultrasonic technology suitable for liquid applications
Rosemount 3300 Series Level and Interface Transmitter
Guided wave radar level and interface transmitter
Rosemount 5300 Series Level Transmitter
High performance 2-wire guided wave radar level
Rosemount 5601 Radar Level Transmitter
High sensitivity radar level transmitter
Rosemount 1151 Alphaline Pressure Transmitter
Proven performance and reliability for differential, gauge and absolute pressure measurements
Rosemount 1151LT Alphaline Liquid Level Transmitter
Flange mounted liquid level transmitter for level and specific gravity measurements in tanks

The Rosemount 3490 universal control units provide comprehensive control functionality for any 4-20mA or HART compatible transmitter. Wall or panel mounted in a non-hazardous area, the 3490 provides a protected (IS) 24V dc power supply to a transmitter that may be installed in a hazardous area. A back-lit display gives clear visual indication of the measured value and status of all inputs and outputs

The Rosemount 3490 universal control unit is configured using an integral 6 button keypad and an easy to navigate menu structure. Many popular configurations are "Wizard assisted", enabling fast and accurate programming. The HART digital or 4-20mA analog signal from the transmitter may be offset, dampened, scaled, and linearized as required. A range of pre-programmed tank shapes, flow algorithms and pump control routines simplify configuration. Typical measurements include level, volume and distance measurement, as well as open channel flow measurement in wide range of flumes and weirs. The 4-20mA output signal may also be scaled to re-transmit all or just part of the input signal or calculated value. Five relays are provided and are fully field programmable to perform a wide variety of control, fault indication or alarm duties.

The Rosemount 3490 universal control unit is available in three configurations. The 3491 is the standard control unit. The 3492 also accepts input from two transmitters and performs sum or differential calculations, providing a single current output proportional to the answer. The 3493 also provides on-board logging of PV and totalized flow values in flow measurement applications.