رله بریر MTL7787+ Zener Barrier
است.
Model MTL7787+ is an intrinsically
safe, zone-powered, Zener-diode barrier for use ... in conventional
fire detection systems for protection within ... resistor. In the event of an electrical fault in the
safe area, the diodes limit the voltage that ... the two stages of voltage limitation ensure continued
safety if either stage should fail. No active ...