Z-System – Zener Barriers
Product Specifications
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Product Specifications
2.1
Function
Zener barriers limit the amount of energy transferred to the hazardous location to
a safe level incapable of igniting the explosive atmosphere. Unlike isolated
barriers, zener barriers require a dedicated ground connection.
Figure 2.1
Zener barrier function
The Z-System zener barriers have a full range of products for AC and DC intrinsic
safety applications with over 75 different models. 1-, 2- and 3-channel versions
are available for quick and easy installation.
The zener barriers mount on 35 mm DIN mounting rail. The process of mounting
each barrier on the DIN mounting rail makes an electrical connection to the
internal earth/ground network necessary to maintain the intrinsic safety rating of
the barrier. Replaceable back-up fuse versions are also available to help facilitate
circuit loop checks and reduce installation cost and space.
Figure 2.2
Zener barrier on DIN mounting rail
Control
system
Sensor
Actuator
Z-System
–
Zener Barriers