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 specialised 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.
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