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

Specifications

Models 3491 - Standard Control Unit
3492 - Differential Control Unit
3493 - Logging Control Unit
Mounting style Wall mount or Panel mount
Power options 115 ⁄ 230Vac or 24Vdc 
Current Input  4-20mA (Earth referenced in control unit) or HART digital communications (Rev. 5) 
   
Display Dot matrix LCD, 32 x 122 pixels, back lit 
Relays  5 SPCO (SPDT), 5A at 240V ac 
Trigger Inputs  2 voltage-free contact closures
Update rate  5 times per second 
Materials of construction (IP-rated wall mount)  Polycarbonate enclosure and cover. 
Materials of construction (panel mount)  Polyphenylene oxide enclosure and polycarbonate cover. 
Materials of construction (NEMA4X-rated wall mount) Polyester and monel fastening.
Ambient temperature -40 °C to +55 °C (-40 °F to + 131°F)
Certification CE-mark, ATEX, IECEx, CSA, or UL

 

Documentation

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

Features & Benefits

3490 Series Features and Benefits

  • Tough weatherproof wall mount enclosure for internal or external mounting
  • Accepts any 4-20 mA or HART compatible input
  • Pre-programmed with tank shapes, flow algorithms and pump control routines to simplify configuration
  • A 20 point strapping table facility is provided for non-standard applications
  • Real time clock allows energy saving routines and pump efficiency calculations
  • 5 voltage free SPDT relays for alarm and control duties
  • 4-20 mA 12-bit isolated current output proportional to calculated value
  • Supports two voltage free contact closure inputs

Applications

The Rosemount 3490 Series of wall and panel mounting control units provide comprehensive control functionality for any 4-20mA or HART compatible transmitter.