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Digital Epic D430/D431/D440/D441/D450/D451 Control Transmitter
Brand: WestlockDiscrete 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
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
