Westlock Controls Control Transmitter, Digital Epic D430/D431/D440/D441/D450/D451
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Digital Epic D430/D431/D440/D441/D450/D451 Control Transmitter

Brand: Westlock
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Discrete position control and precision, non-contact position feedback with digital communication via HART protocol in a simple, integrated package.

With options for linear or rotary control valves, and remote PST/ESD initiation.
Features
  • Microprocessor based technology allows digital communication via HART protocol
  • Remote and local partial stroke test (PST) and emergency shut down (ESD) initiated remotely via HART signal for safety system applications
  • Optional external button to initiate partial stroke test
  • Valve position measurement via a non-contact magnetic pick-up eliminates mechanical drive arms or linkages increasing reliability in high cycle applications or where vibration is present
  • Highly visible position indicator
  • Models D430 and D431 feature corrosionresistant resin enclosure
  • Models D440 and D441 feature low copper content aluminum enclosure with polyurethane enamel coating
  • Models D450 and D451 feature heavy duty stainless steel enclosure

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Specifications

Brand

Approvals & Certifications

  • ATEX Ex II 1 G Ex ia IIC T4 Ta = -40° to 80° C, Ex II 3 G Ex NA IIC T4 Ta = -40° to 80° C
  • IEC Ex II 1 G Ex ia IIC T4 Ta = -40° to 80° C, Ex II 3 G Ex NA IIC T4 Ta = -40° to 80° C

Communication

  • HART

Conduit Connection

  • 1/2” NPT
  • 3/4” NPT
  • M20
  • M25

Enclosure Finish

  • Engineered Polyamide Resin - Model D430 / D431 / D440
  • Low Copper Content Aluminum Polyurethane Coated - Model D430/D440/D441/D451
  • Stainless Steel with Electro-Polished Finish - Model D441 / D450 / D451

Enclosure, Body Material

  • Engineered Resin - Model D430 / D431
  • Low Copper Content Aluminum - Model D440/D441
  • Stainless Steel - Model D450/D451

Environmental Protection

  • Intrinsically Safe
  • IP55 - Model D430
  • IP67 - Model D450
  • IP68 - Model D451
  • Weatherproof

Humidity

  • 10 to 90 % Relative Humidity, Non-Condensing

Linearity

  • ± 1 % of Full Scale

Materials of Construction

  • Beacon Visual Indicator: Co-Polyester
  • Hardware: Stainless Steel

Mounting

  • Remote Mounting

Mounting Position

  • Any Orientation

Operating Temperature

  • -40° to 85° C (-40° to 185° F)

Output

  • 4-20 mA Proportional to Valve Position

Power Supply Effect

  • Voltage Effect: ≤ 0.2 % of Full Scale from 10-30 Vdc

Resolution

  • ≤ 0.05 % of Full Scale

Reverse Polarity Protection

  • Protected Against Reverse Polarity

Span & Zero Adjustments

  • Span: 60° to 120°
  • Zero: 30 % of Calibration Span

Temperature Effect

  • ≤ 0.01 % of Full Scale/°C

Terminal Voltage

  • 10-30 V

Turn-On Time

  • Startup Stabilization: 0.5 seconds

Update Time

  • Output: 25 milliseconds

Documentation

Data Sheets

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