Đầu báo nhiệt chống nổ (50ºC) Siemens
Thông tin chi tiết
For applications with Ex detectors
– Safety diode barrier SB3 with input/output module DC1192/FDCIO223
If fire detectors have to be installed in explosion-hazard areas, the wiring and equipment must comply with the local national safety regulations. Normally, fire detector circuits require very little current and for this application, the explosion protection category
‘Intrinsic safety’ Ex i is suitable. The standards which cover this are EN 50014 (EN
60079-0) and EN 50020 (EN 60079-11).
A safety barrier restricts the electrical energy between non-intrinsically safe and intrinsically safe circuits.
Safety barriers are designed to restrict electrical power to such a degree that electrical
sparks cannot ignite a gas mixture. Safety barriers SB2 and SB3 are approved for explosion protection category [Ex ia] IIC/IIB. Only electrical equipment which complies
with the local national regulations and intrinsically safe protection category Ex ia or ib
may be connected to the output of the safety barriers.
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