The Foxboro SRD991 is a high-performance intelligent electro-pneumatic positioner designed for precise control of linear and rotary actuators. Part of Schneider Electric’s Foxboro portfolio, it combines robust mechanical design with advanced digital electronics to deliver reliable valve positioning in demanding industrial environments.
| Parameter | Specification |
|---|---|
| Input Signal | 4–20 mA (HART), Bus protocols |
| Supply Air | 1.4 to 6 bar (ISO 8573-1 compliant) |
| Stroke Range | Linear: up to 200 mm; Rotary: 0–100% |
| Operating Temperature | -40°C to +80°C (standard) |
| Protection Rating | IP66 / NEMA 4X |
| Communication | HART, PROFIBUS PA, FOUNDATION Fieldbus |
| Air Consumption | Very low in steady state |
| Mounting | NAMUR, Direct, Rotary adapter |
| Approvals | ATEX, IECEx, FM, CSA (intrinsically safe & explosion-proof) |
Q: How long does Autostart take?
A: Typically 3–10 minutes depending on actuator size and selected mode.
Q: Can it be configured without a handheld or PC?
A: Yes, full local configuration is possible via the built-in keypad and LCD.
Q: Is it suitable for double-acting actuators?
A: Yes, it supports both single and double-acting configurations.
Phone/WeChat/WhatsApp: +8613916209596
Email: svetama@gbsxj.com
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