About PEPPERL+FUCHS Z778 Zener Barrier

PEPPERL+FUCHS Z778 Zener Barrier

2 Channel Zener Barrier with Analogue Output, 250 V max, 46mA max P&F Dual Channel Zener Diode Barriers Using a dual channel barrier impedes a direct grounding of the intrinsically safe circuit. The ground is only made in the event of a failure, if the zener diodes conduct.

Intrinsic Safety for Hazardous Areas

The PEPPERL+FUCHS Z778 Zener Barrier ensures safe operation of sensor and field instruments within hazardous environments by limiting energy transfer through its dual-channel, zener diode protection. Compliance with international safety (EN 60079-11) and EMC (EN 61326-3-1) standards ensures reliable performance in industrial settings where explosion protection is paramount.


Flexible Installation & Durable Construction

With a compact, epoxy-sealed metal housing and IP20 rating, this module is built for longevity and resilience. Its versatile design allows mounting on standard DIN rails or directly onto surfaces, and screw terminal connections simplify wiring. The Z778 is suitable for a broad range of applications, from hazardous area automation to sensor signal isolation.


Passive Operation and Wide Compatibility

The Z778 operates without any external power supply, making it inherently reliable for continuous use in demanding environments. Its compatibility with Endress+Hauser products and wide input range support diverse field applications, providing peace of mind and easy integration in new or existing system installations.