7787+ - Zenner Barrier

  • LIMITS / VOLTAGE CURRENT INTO HAZARDOUS AREA
  • 2 STAGES OF VOLTAGE LIMITATION
  • IS APPROVED
  • 12.5mm WIDE

Product Description

The 7787+ barrier contains two stages of pulse-tested Zener or forward-connected diodes and an ‘infallible’ terminating resistor. In the event of an electrical fault in the safe area, the diodes limit the voltage that can reach the hazardous area and the resistor limits the current. A fuse protects the diodes, and the two stages of voltage limitation ensure continued safety if either stage should fail. No active output-current limiting circuits are employed. The MTL7787+ is certified ‘ia’ for all zones and ‘IIC’ for all explosive atmospheres.


 
Status Instruments Ltd,  Status Business Park, Gannaway Lane, Tewkesbury, Glos, GL20 8FD  Tel: +44 1684 296818 · Fax: +44 1684 293746 · E-mail: sales@status.co.uk
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