Vimpex PF-Z978 Zener Barrier 2 Channel

Vimpex PF-Z978 Zener Barrier 2 Channel

The Zener Barrier prevents the transfer of unacceptably high energy from the safe area into the hazardous area. The zener diodes in the Zener Barrier are connected in the reverse direction. The breakdown voltage of the diodes is not exceeded in normal operation. If this voltage is exceeded, due to a fault in the safe area, the diodes start to conduct, causing the fuse to blow.

The Zener Barrier has alternating polarities, i. e. interconnected zener diodes are employed and one side is grounded. The Zener Barrier can be used for both alternating voltage signals and direct voltage signals.

Depending on the application, increased or decreased intrinsic safety parameters apply for serial or parallel connection. 

Key Features

• Nominal resistance: 600 ohm
• Star connection
• DIN rail mounting
• AC version
• 2-channel
• Series resistance max: 646 ohm
• Fuse rating: 50 mA
• Degree of protection: IP20
• Connection: Screw terminals
• Core cross-section max: 2 x 2.5 mm2
• Mass approx.: 150 g
• Dimensions: 12.5 x 115 x 110 mm (0.5 x 4.5 x 4.3 inch)