Rosemount 3490 4-20 mA and HART® Compatible Control Units

Rosemount 3490 4-20 mA and HART® Compatible Control Units

The Rosemount 3490 Series of wall and panel mounted 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. The 3490 provides an intrinsically safe 24V dc power supply to the transmitter. Five relays are provided and are fully field programmable to perform a wide variety of control, fault indication or alarm duties.

. Tough weatherproof wall mount enclosure for internal or external mounting

. Accepts any 4-20 mA or HART compatible input

. Five field adjustable control relays

. Bright local display of measured value

. Pre-programmed with tank shapes, flow algorithms and pump control routines to simplify configuration

. 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.

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.

Product Data Sheet: RosemounT 3490 Series 4–20 mA + HART® Compatible Controller