The STI 4028 FasTrak positioner instruction manual provides safety guidelines, installation steps, and maintenance procedures for the digital‑pneumatic…
The FasTrak™ positioner is a high‑capacity, high‑precision digital‑pneumatic valve controller designed for use in hazardous areas. It offers configurable analog and digital I/O, HART communication, and optional display and push‑button interfaces.
This manual covers general safety instructions, detailed installation of pneumatic and electrical connections, configuration options such as fail‑freeze and remote sensor, and maintenance procedures. It also lists specifications for intrinsically safe, explosion‑proof, and natural‑gas executions.
| Power supply voltage (intrinsically safe) | 12 ÷ 30 Vdc |
|---|---|
| Analog input range | 4 ÷ 20 mA (HART) |
| Analog output range | 4 ÷ 20 mA passive loop, 10 ÷ 26.5 V |
| Feedback angle of rotation | 30° ÷ 120° |
| Adjustable speed range | 0 ÷ 300 seconds |
| Air supply pressure | 2.5 ÷ 10 bar |
| Environmental protection rating | IP66 (NEMA 4x) |
| Operating temperature range | -40 °C to +80 °C |
The intrinsically safe version requires a power supply of 12 ÷ 30 Vdc with a minimum current of 3.5 mA.
The analog output is a 4‑20 mA passive loop with a voltage range of 10 ÷ 26.5 V.