基于基金会现场总线的本质安全系统

Ingrain Security System Based on Foundation Local Bus

基于基金会现场总线的本质安全系统,包括本质安全栅和本质安全电流隔离器。前者由并联齐纳二极管、串联限流电阻和保护熔断器构成的网络组成,具有在点燃危险环境前把过压、浪涌电流和过载电流安全转移到系统“地”。后者采用能防止浪涌电流或过载电流从安全区传输到危险场所的高度可靠的隔离措施来保证安全。

The ingrain security system based on the foundation local bus, including IS fence and IS current isolators. The former is composed by parallel diode, series limiting resistor and protection fuses, which can transfer overload pressure, the surge current and overload current to the system ＂GND＂ before fire the dangerous environment. The latter can be used to prevent the surge current or overload currents from the security zone transmission to the dangerous place to ensure the reliable isolation security.