Hochiki Z787 Zener Barrier Dual Channel

Hochiki Model Z787 is an Intrinsically Safe Zener diode barrier specifically designed for use in conventional fire detection systems in hazardous areas. 

Key Features:

• Self-Safe Design:Certified 'ia' for all zones and 'IIC' for explosive atmospheres.
• Zone Supply:It is designed to receive power from the area it protects.
• Zener-Diode Barrier:Each zone contains two-stage pulse-tested Zener or forward-junction diodes.
• Termination Resistance:It includes a 'fault-free' termination resistor to limit current.
• Error Protection:In case of an electrical fault in the safe area, diodes limit the voltage that can reach the hazardous area, and the resistor limits the current.
• Insurance Protection:Fusions protect diodes from excessive currents.
• Redundancy:Two-stage voltage limiting ensures constant safety even if one stage fails.
• No Active Current Limiting Circuits:It relies on Zener or forward-junction diodes to limit voltage without active current limiting circuits.

Technical Specifications:

• Certifications:It has 'ia' (intrinsic safety) and 'IIC' (explosive atmosphere) ratings for use in explosive atmospheres.
• APPLICATION:It is specially designed for conventional fire detection systems in hazardous areas with explosive atmospheres.

Model Z787 ensures safe operation of fire detection systems in potentially explosive environments by limiting electrical energy entering hazardous areas.