Mitsubishi MELSEC-WS series, User Manual

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2
CAUTION

Ensure that an entire system using the MELSEC-WS safety controller meets the requirements for
the corresponding safety category.

The life of safety relays in the safety relay output module depends on the switching condition
and/or load. Configure a system satisfying the number of switching times of the safety relays in
the module.

Do not install the communication cables together with the main circuit lines or power cables. Keep
a distance of 100 mm or more between them.
Failure to do so may result in malfunction due to noise.

If a mechanical switch such as a relay is connected to an input terminal of a safety I/O module,
consider contact bounce.

Observe the protective notes and measures.
Observe the following items in order to ensure proper use of the MELSEC-WS safety controller.

When mounting, installing and using the MELSEC-WS safety controller, observe the standards
and directives applicable in your country.

The national/international rules and regulations apply to the installation, use and periodic
technical inspection of the MELSEC-WS safety controller, in particular.

Machinery Directive 2006/42/EC

EMC Directive 2004/108/EC

Provision and Use of Work Equipment Directive 89/655/EC

Low-Voltage Directive 2006/95/EC

The work safety regulations/safety rules

Manufacturers and owners of the machine on which a MELSEC-WS safety controller is used
are responsible for obtaining and observing all applicable safety regulations and rules.

The notices, in particular the test notices of this manual (e.g. on use, mounting, installation or
integration into the existing machine controller), must be observed.

The test must be carried out by specialized personnel or specially qualified and authorized
personnel and must be recorded and documented and retraced at any time by third parties.

The external voltage supply of the device must be capable of buffering brief mains voltage
failures of 20 ms as specified in EN 60204.

The modules of the MELSEC-WS safety controller conform to Class A, Group 1, in accordance
with EN 55011. Group 1 encompasses all the ISM devices in which intentionally generated
and/or used conductor-bound RF energy that is required for the inner function of the device
itself occurs.

The MELSEC-WS safety controller fulfils the requirements of Class A (industrial
applications) in accordance with the “Interference emission” basic specifications.
The MELSEC-WS safety controller is therefore only suitable for use in an industrial environment
and not for private use.