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VAC D500 Advanced Digital Positioner

Reliability– Proven rugged technology, vibration test specified.
Flexibility– Various mounting options, analog or binary feedback alarms,
microswitches with universal analog input available
Diagnostics– Pressure sensor option for advanced diagnostics with
partial stroke capability standard
Performance– Very high resolution, air delivery, precise positioning with
270-degree sensor, SIL2, and intrinsically safe options.
Simple-push buttons for auto-calibration and configuration,
LCD program with standard loop calibrator.

The D500 microprocessor based positioner brings the latest technology, flexibility, and user-friendly features (local push buttons and LCD display) for local operation and calibration of a pneumatic actuator and/or control valve package. A robust design (NEMA 4X, Ip 65), with excellent air delivery, uses very traditional and proven components to provide very fast, accurate, and consistent control with very low air consumption.

Optional accessories like analog or digital feedback, various switch options, an emergency shutdown module, SIL 2 approvals, fail freeze option and pressure sensors for advanced diagnostics make the D500 a complete positioner package. Coupled with VAC’s multiple drive adapters and an extensive list of rotary or linear actuator mounting, this combination offers users and distribution channels a lot of flexibility and opportunities.

Housing-Cast Aluminum standard (stainless optional)-weight 5.3 lbs.
Nema 4 X Ip 65 Hardened Epoxy resin
Temp range -40-185 F
Gauge block with gauges (standard)
Meets DIN/IEC 60068-3-3 Class III for strong and strongest earthquakes
25-270° rotation (rotary and or linear applications)
FM/CSA Intrinsically safe approvals (Atex-Gost-others) available
Inputs: Electrical
Nominal range-2 wire-4-20 mA and or Hart-5 or 7 (Supply 5-30 VDC)
Load at 20 mA 9.7 V
Impedance @ 20 mA 285 Ω
Fail Safe (standard) or Fail Freeze (optional)
Connections-1/2” NPT with Cable gland
Inputs: Pneumatic (air supply per DIN/ISO 8573-1
1/4 “ NPT
0-145 PSI Supply
0.015 SCFM Air Consumption-13 SCFM Delivery @ 87 PSI

Ordering Codes:
D500-Standard Unit
D500 IS-Intrinsically Safe-FM/CSA-Atex-IECEx-GOST available
S-Single Acting or D-Double Acting
N-Npt or G-Metric
D1-Namur, D2-1/2” square, D3-3/8” square, D4-round linear,
D5-double “D” Communication, NO-No communication or H-Hart

S2-Micro Switches, ProxNC-Proximity Switches Normally Closed, 4/20 Transmitter, FF-Fail Freeze, PSEN-Pressure Sensors, RSEN-Remote Sensors, ESM-Emergency Shutdown Module, SIL-SIL 2 Certification, SS-Stainless Housing

Standard D500, single acting, NPT threads, Namur spindle, Hart Communication, 4-20 mA feedback, fail freeze-with pressure sensors

D500 Product Features
• Advanced diagnostics with pressure sensors
• Partial stroke standard
• SIL 2 and intrinsically safe optional
• Excellent air delivery with very low air consumption.
• 25 deg to 270 deg rotation
• VAC rotary or linear mounting options.
• Seismic vibration-DIN/IEC 60068-3-3 Class III for
strongest earthquakes.
• Fail-safe standard, Fail Freeze optional.
• Stainless housing optional.


D500 Product Overview
D500 Data Sheet
D500 Software Download
D500 Commissioning Instructions
D500 Spindle Drawing