The SRD991 intelligent positioner consists of a basic device with a digital controller that supports different communication protocols (or also simply 4-20 mA input). into this basic device, additional equipment can be built such as plug-in cards for electrical input/output signals, position feedback, and pressure sensors.
Features of Foxboro Eckardt SRD991 Intelligent Positioner
- Stroke 8 to 120 mm / 260 mm (0.3 to 4.7 in / 10.2 in)
- Angle range up to 95 °
- Supply air pressure up to 6 bar (90 psig),with spool valve up to 7 bar (105 psig)
- Single or double-acting
- Mounting on linear actuators according to NAMUR
- Mounting on rotary actuators acc. to VDI/VDE 384
- Protection class IP 65, NEMA 4X
- Explosion protection: Intrinsic safety according to ATEX and FM/ CSA
- Auto-start with self-calibration Self diagnostics, status- and diagnostic messages
- Easy operation with three key pads
- Multi-Lingual full text graphical LCD
- VALcare™ or Valve Monitor DTM for valve diagnostics and predictive maintenance
- HART, FOUNDATION Fieldbus H1, PROFIBUS-PA option with input signal 4 to 20 mA
Specification of Foxboro Eckardt SRD991 Intelligent Positioner
- Stroke range . . . 8 to 260 mm (0.3 to 10.2 in)with standard feedback levers; special levers on
- Rotation angle range . . . up to 95° without mechanical stop
- Supply air pressure . . . . . . . 1.4 to 6 bar (20 to 90 psig) with spool valve 1) . . . . . . 1.4 to 7 bar (20 to 105 psig)
- Output to actuator . . . . . . . . 0 to ~100 % of supply air
- pressure (up to 5.5 bar at 6 bar supply air pressure)
- with spool valve heavy duty2): 4 to 10 bar
- Air supply. . . . . . . . . . . . . . . according to ISO 8573-1
- – Solid particle size and density class 2
- – Oil rate. . . . . . . . . . . . . . . class 3
