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If safe operation is impaired, make the multifunction counter inoperable and secure it against
inadvertent operation.
•
Scope of applications: industrial processes and controls. Overvoltage across the terminals must be limited
to the values specified in overvoltage category II.
•
The installation and wiring has considerable impact on the electromagnetic properties of the
multifunction counter. Therefore, electromagnetic compatibility of the entire application must be
ensured during the instal- lation.
•
In areas presenting the risk of ESD (electrostatic discharge), use ESD-protected plugs and switches.
•
If the functions "prescaler input", "preset input" and "key reset" are not allowed to be used by the
machine/ plant operator, access to these functions must be locked. Depending on the machine/plant
design or concept, non-permissible input may impair the operational safety and function of the
machine or plant.
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