Zener barriers – cost saving and easy mounting Ex-protection

Zener barriers provide cost saving Ex-protection for various applications in process automation systems. The amount of energy transferred to the hazardous location is limited to a safe level incapable of igniting the explosive atmosphere. Pepperl+Fuchs offers a wide product portfolio of housing and connection styles, which include DIN rail, termination board mounted, and accessories for each application.

Zener barriers have to be connected to an IS ground.

The IS grounding can be realized several ways:

• Isolated from the DIN- Rail
• Via an isolated DIN-Rail
• Via DIN-Rail

Field replaceable fuses provide a convenient means of disconnecting or open-circuiting the instrument loop without interfering  with the wiring, making commissioning and maintenance operations much easier.

Z-System

The zener barriers of the Z-System are DIN-Rail mountable. Utilizing the DIN rail,  the IS grounding is made possible without additional wiring efforts.

SB-System

This system consists of single SB-terminal bases or multi-sockets (SB-termination board) where the zener barriers (SB-barriers) are plugged in. The complete system is mounted on a 35mm DIN Rail.