Product-specific information
2.2 Safety information for hazardous areas
Modular Safety System 3RK3
16 System Manual, 10/2008, 926 2530-02 DS 02
NOTICE
Operational faults and malfunctions in communication
If the EMC Directive 89/336/EEC (CE) is not observed when plants and devices are
installed, communication breaks may occur.
Note
Cover all unused system interfaces.
2.2 Safety information for hazardous areas
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Installing the MSS
The MSS components are not suitable for installation in hazardous areas.
Use the devices only in a control cabinet with a degree of protection of at least IP 4x. When
installed in hazardous areas, the MSS components must not present any possible
explosion hazard. Take all appropriate measures, e.g. enclosure.
2.3 Guidelines for inductive loads
CAUTION
If a switching contact is installed between solid-state outputs and an inductive load, the load
must be equipped with inductive interference protection because the inductive interference
protection of the module becomes ineffective when the switching contact is actuated.
Inductive loads must be provided with protective circuits that limit the voltage rise when the
controller output is switched off. Protective circuits protect the outputs against premature
failure due to high inductive switched currents. They also limit the electrical faults that can
occur when inductive loads are connected.
Tip
The effectiveness of a protective circuit depends on the respective application and must
always be checked on a case-by-case basis. The components in a protective circuit must
always be rated in line with the relevant application.
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