Z-System – Zener Barriers
Installation
2016-03
17
3.3 Connection
Danger!
Explosion hazard from wrong or missing grounding
Wrong or missing grounding can cause sparks. This can ignite the surrounding
potentially explosive atmosphere.
• Ground the device. Observe the grounding requirements for type of protection
Ex i according to IEC/EN 60079–14.
• Ensure that external ground connections exist, are in good condition, and are
not damaged or corroded.
Danger!
Explosion hazard from live wiring
If you connect or disconnect energized non-intrinsically safe circuits in a
potentially explosive atmosphere, sparks can ignite the surrounding atmosphere.
Only connect or disconnect energized non-intrinsically safe circuits in the
absence of a potentially explosive atmosphere.
Danger!
Explosion hazard from wrong separation distances
If you do not observe the minimum separation distance between 2 intrinsically
safe circuits, this can lead to added currents or voltages. This can result in a
current/voltage flashover generating sparks. The sparks can ignite the
surrounding potentially explosive atmosphere.
Ensure you observe all separation distances between 2 adjacent intrinsically safe
circuits according to IEC/EN 60079-14.
Danger!
Danger to life from incorrect installation
Incorrect installation of cables and connection lines can compromise the function
and the electrical safety of the device.
• Observe the permissible core cross-section of the conductor.
• When using stranded conductors, crimp wire end ferrules on the conductor
ends.
• Use only one conductor per terminal.
• When installing the conductors the insulation must reach up to the terminal.
• Observe the tightening torque of the terminal screws.
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