Siemens 771-8STF2 Current-to-Pneumatic Transducer, 4-20 mA to 3-27 psig, F2

Siemens 771-8STF2 Current-to-Pneumatic Transducer

The Siemens 771-8STF2 is a Series 771 current-to-pneumatic transducer designed to convert a DC milliampere input signal into a proportional pneumatic output. This configuration provides 4–20 mA input and 3–27 psig output performance within a NEMA-rated enclosure.

Signal Conversion and Configuration

• Input range: 4–20 mA DC
• Output range: 3–27 psig
• Input impedance: 610 ohms
• Standard output capacity: 0.16 scfm
• Terminal strip electrical connection

Performance Characteristics

Series 771 standard-capacity units provide ±0.5% of span calibration accuracy, 0.2% reproducibility, and 0.025% response level. Supply pressure is 20 psig, with 35 psig specified for 771-8 series configurations. Zero offset adjustment is +40% and –20% of span.

Hazardous Location Classification

• F2: Non-incendive, Class I Div. 2 Groups A, B, C, D
• Dust-ignition proof, Class II Div. 1 Groups E, F, G
• Suitable for Class III Div. 1 hazardous locations
• NEMA 3R / NEMA 4 via conduit vent