• Autostart with self-calibration
• Self-diagnostics
• Load 320 Ohm
• Configuration by means of local keys and LEDs
• Low air consumption
• Stroke 8 to 120 mm (0.3 to 4.7 inch)
• Angle range up to 95 °
• Supply air pressure up to 6 bar (90 psig)
• Single acting or double acting
• Mechanical travel indicator
• Reverse polarity protection and interlock diode
• Attachment to stroke actuators directly or according to IEC 534 part 6 (NAMUR)
• Attachment to rotary actuators according to VDI/VDE 3845
• Protection class IP 65 and NEMA 4X
• Explosion protection: EEx ia IIC T4 according to CENELEC or “Intrinsic safety” according to FM
•  Additional equipment (compatible to SRD991):
• Two binary control inputs for ‘open / close’ and ‘stop at last value’
• Position feedback 4-20 mA and alarm, galvanically separated
• Two limit switches, galvanically separated
• Integrated inductive limit switches, independent of device electronics
•  Additional parts as for example:
• Gauge attachment for supply air and outputs
• Booster relay

The Digital Positioner SRD992 with analog input 4 ... 20 mA is designed to operate pneumatic valve actuators.
  It offers the enhanced functionality of highly modern positioners such as Autostart for the determination of the control parameters as well as comfortable on site operation.