This is the user manual for the FB-A safety barrier released by Beijing ColliHigh Sensor Center in January 2005. It provides an overview of the safety barrier, its main features, applications, technical specifications, working principles, and precautions.
The FB‑A safety barrier is a compact, explosion‑proof device designed for use in IIB‑rated hazardous environments such as oil and chemical plants. It connects primary instruments in dangerous zones to secondary instruments in safe zones, limiting energy when voltage or current exceeds preset thresholds.
The manual includes sections on product overview, main features, applications, technical specifications, working principle, safety precautions, dimensions, wiring diagrams for two‑, three‑ and four‑wire configurations, installation method, and a quality guarantee statement. This manual is written in Chinese.
| Operating temperature | -10 °C to +50 °C |
|---|---|
| Storage temperature | -10 °C to +70 °C |
| Relative humidity | ≤85 % RH |
The FB‑A safety barrier is certified to the Ex ib IIB explosion‑proof level.