Rockwell Automation 440F MatGuard, 440F-C4000 Mat Controllers - Manual (Page 15)

Section 5 - INSTALLATION DESIGN
This manual should be read in full before installation is commenced.
It is recommended that installations should only be designed by persons suitably competent in electrical
and mechanical engineering and having experience in safety related control system design.
Many factors contribute to a safe and reliable installation. Working through the following steps will ensure
that nothing is overlooked and that the installation can be planned and implemented with
minimum fuss and maximum confidence. The detail of the procedures which follow is based on
European best practice, and compliance with EU Machinery Directive. Even if these requirements do not
apply in your installation, we recommend that you follow the same steps but modify the detail to suit
relevant statutory requirements or codes of practice (e.g. ANSI, OSHA).
5.1 NATURE OF HAZARD
The system provides protection against risks which can be eliminated by the isolation of electrical power
when an operator is in the vicinity of the hazard.
Additional measures be required to deal with other hazards identified at a risk assessment (e.g. part
ejection, hot surfaces etc.). These measures may include fixed guards, interlocked guards, warning
notices etc. Contact supplier for further information if required.
NOTE: Risk assessment is included in EN 291-1 and detailed in EN 1050.
5.2 NATURE OF SAFEGUARDING
The system design must satisfy three main requirements:
1. The machine must be stopped if a person is in a position of being able to reach into the hazard
zone.
2. The machine must come to a stop before an approaching person can be in the position of
being able to reach into the hazard zone.
3. The system shall not be easily bypassed.
The recommended use of the mat system gives presence sensing over the whole area where access is
possible to the hazard. (see the examples in fig. 9 ). Other uses of mat system, for example, solely as a
perimeter access guard, or as a machine enabling device are not recommended. If you are considering
mat system for any application not covered by this manual, please contact Supplier.
Fig. 9
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