Rockwell Automation 440F MatGuard, 440F-C4000 Mat Controllers - Manual (Page 22)

The control unit conforms to category 3 according to EN 954-1. In common with other
safety mats and floors, category 3 performance for the sensor mat cannot be achieved for faults
resulting from severe mechanical damage or long term degradation. The sensor mats conform to
category 1 according to EN 954-1.
The system comprising of interconnecting sensor mats and control unit meets the requirements
of EN 954-1 category 3.
The mat system may be used as the sole protective measure or in combination with other measures or
devices (e.g. safety light curtain, system of work).
Where a harmonised European “C” standard is available for the machine type, it will contain
requirements and guidance for the machine’s safety related control system. EN954-1 also provides
guidance. It is important that an adequate level of protection against foreseeable faults is provided to the
appropriate category of EN 954-1 and for this reason it is recommended that a dual channel
configuration with duplication and monitoring of the final switching elements (contactors) is used on all
higher risk applications.
Examples of interconnections of the mat system are given in figures 15, 16, 17 and 18.
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