Yokogawa Field Mount Loop Indicator, MLX
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MLX Field Mount Loop Indicator

Brand: Yokogawa Electric Corporation
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The MLX is the latest addition to Yokogawa's family of loop powered indicators operating from a 4-20 mA DC input. 

This model uses the same explosion proof housing as the MLA and MLD, and incorporates the LCD display from the EJX pressure transmitter. 

The display itself contains a 6 digit numerical display, a 6 digit alphanumeric display for engineering units and a 20 segment bar graph indicating 0 to 100% of full scale. 

The display is user configurable to show the desired engineering units. 

Another unique feature is square root extraction from a pressure transmitter signal for flow measurement. 

Please consult our general specification or instruction manual regarding product related details, options, mounting and wiring.
Features
  • User interface
    • A front panel push button switch combined with four touch switches allows easy configuration of the indicator (calibration, span, zero and engineering units).
  • Root extraction
    • For applications where the process variable is non-linear and based on the square root, 3/2 root or 5/2 root, the MLX can be configured to display the root function of the input.
  • Field Configurable 
    • Via the front panel user interface, the process variable parameters can be modified as desired in the field.
  • LCD Display features
    • The LCD display includes a bar graph for an analog indication of the process variable magnitude. The 6 digit display and 6 character display (combined with several symbols) give an instant view of all process variable parameters. A menu system allows customizing parameters such as decimal point position, engineering units, status of symbols and state of bar graph.
  • Self-diagnostics
    • Built-in diagnostics operate at power-up and during operation for ease of maintenance and troubleshooting.
  • EMC Conformity Standard
    • EN61326-1 Class A, Table 2 (for use in industrial location)
  • Built-in Loop Protection
    • Includes circuitry that, in the event of MLX failure, automatically takes the MLX out of the loop thus maintaining loop integrity.

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Specifications

Brand

Accuracy

  • ± 0.05 % of Full Scale +1-Digit
  • 0.02 % of Full Scale - Max.
  • -0.03 % of Full Scale - Max.

Ambient Temperature Range

  • -40° to 80° C (-40° to 176° F)

Approvals & Certifications

  • ATEX Intrinsically Safe, Flameproof, Non-Incendive Approval
  • CE
  • CSA Intrinsically Safe, Explosion-proof, Dust Ignition-proof, Non-Incendive Approval
  • EMC EN 61326-1 Class A
  • FM Intrinsically Safe, Explosion-proof, Dust Ignition-proof, Non-Incendive Approval
  • IECEx Intrinsically Safe, Flameproof, Non-Incendive Approval

Cable Type

  • Twisted Pair Shielded Cable

Current

  • 200 mA without Damage - Over-Range
  • 3.6 to 28 mA - Operating Current

Display

  • 20-Segment Bar Graph
  • LCD Display
  • Six 14-Segment Alphanumeric Characters
  • Six 7-Segment Digits - Numerical

Electrical Connectors

  • 1/2”-14 Female NPT
  • M20 x 1.5 Female

Enclosure Finish

  • Epoxy Resin Coating
  • Gray (RAL # 7046)
  • Light Blue (RAL # 5012)
  • Mint Green
  • Orange (RAL # 2008)
  • Polyurethane Resin Baked Finish - Deep Sea Moss Green (Equivalent of Munsell 0.6 GY3.1/2.0)
  • Polyurethane-Epoxy Anti-Corrosion Coating
  • Red (Munsell # 7.5 R4/14)
  • Silver (RAL # 9006)
  • Yellow (RAL # 1018)

Enclosure, Body Material

  • 304 Stainless Steel - Wired Tag
  • 316 Stainless Steel - Name Plate
  • Black Anodized Aluminum - Name Plate
  • Low Copper Cast Aluminum Alloy with Polyurethane Paint
  • SUS316 Cast Stainless Steel (ASTM CF-8M)

Environmental Protection

  • IP66
  • IP67
  • NEMA 4X

Humidity

  • 0 to 100 % Relative Humidity at 23° C (73° F) - Ambient Humidity

Hysteresis

  • 0.03 % - Hysteresis Error

Input

  • 4-20 mA DC 2-Wire

Isolation

  • 500 Vdc - Input/Output / Ground Isolated

Linearity

  • 0.03 % - Conformity

Mounting

  • 2” (50 mm) Pipe Mount
  • Bracket
  • Surface
  • Wall Mounted

Mounting Position

  • Horizontal
  • Vertical

Repeatability

  • 0.03%

Shock

  • 50 G

Span & Zero Adjustments

  • Zero & Span can be Set between ± 999,999

Temperature Effect

  • 0.1° C (0.18° F) Per 10° C (18° F) - Ambient Temperature Effect

Turn-On Time

  • 12 seconds (Includes Power On Self-test & Memory Integrity Check)

Update Time

  • 1 second

Vibration

  • 3 G at 10 to 150 Hz

Voltage Drop

  • 3.5 V at 20 mA

Documentation

Data Sheets

Product Manuals

Brochure

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