12
8024250/18HT/V2-0/2020-12| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-G
Subject to change without notice
2
FOR YOUR SAFETY
Escaping gases
Potential equalization
2.2
Warning information on device
Control unit Z200EXG-y1********************* (y= 1, 2)
Fig. 1: Warning information on control unit
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Warning - Only open in an Ex-free environment.
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Warning - Do not open under voltage.
DANGER:
Risk of burns and poisoning from escaping hot and toxic gas in systems with
overpressure conditions
In systems with overpressure, hot and toxic gas can escape from the process
connection. This can lead to burns or damage to health.
▸
Always keep the process connection tightly closed.
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Pay attention to hot surfaces.
▸
Wear appropriate protective equipment.
CAUTION:
Danger of explosion through incorrect or missing grounding
Incorrectly connected potential equalization can lead to potential differences which can
create sparks due to transient phenomena (discharges) and lead to explosions in Ex-
atmospheres.
▸
Connect a potential equalization on all planned points on the device components.
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Ensure the potential equalization is connected during all work on the device
described in these Operating Instructions.
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Ensure there is a ground connection via the voltage supply.
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Perform regular checks of the grounding connections for intactness.
Warning
