Z728 Shunt Diode Safety Barrier for IFD-E(I.S)Model Z728 is an intrinsically safe, zone powered, Zener diode barrier for use in conventional fire detection systems for protection within hazardous areas. Each Zone contains two stages of pulse tested Zener or forward connected diodes and an 'infallible' terminating resistor. In the event of an electrical fault in the safe area, the diodes limit the voltage that can reach the hazardous area and the resistor limits the current. A fuse protects the
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