Installation manual

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2.1
Presentation
Modicon TSX Micro
automation platform 0
Use of Preventa safety modules
Production workshops and technical building installations are subject to increasing requirements in terms of machine
safety
A good machine is a safe machine, combining:
b Safety of personnel (machine is not dangerous).
b Availability of the production tool (machine operational at any time).
b Safety is achieved by:
v simultaneously optimising safety and availability,
v using basic principles: redundancy, self-monitoring, etc,
v
considering reliability (failure determining the behavior of the machine in a specified position, positive safety
feature
s),
v ease of maintenance.
A machine manufacturer is required to conform to the machinery directive. The machinery directive
(89/392/EEC, 91/36/EEC, 93/44/EEC and 93/68/EEC) is designed to ensure the free circulation of machinery
and safety components in European Union countries and to improve the level of safety for personnel.
Harmonised European standards establish technical specifications which comply with the minimum safety
requirements
defined in the corresponding directive.
Manufacturers must produce machinery which conforms to safety requirements.
The user is required to ensure that his range of machines conforms to the use of work equipment by
workers at work directive. Directive 89/655/EEC lays down the minimum objectives for protection in the
working environment and in particular concerns the use of products. The directive specifies the general
framework of preventative measures which should be taken in the workplace.
All dangerous areas must be identified and have restricted access, controlled in a secure manner, ie. any
breakdown or careless operation must leave the automated system in a safe position.
It should be noted that the use of safety products does not necessarily mean that the machine conforms to the
machinery directive.
It is the operation, wiring, compatibility and scheme used, which make the entire machine safe. It is more important
to think in terms of safety solutions rather than safety products.
Groupe Schneider, specialists in safety, has a range of several thousand products, all concerned directly or
indirectly with safety. Some of these products are exclusively designed for safety.
For further details on components for safety applications, please consult our specialist catalogue.
Safety
The machinery directive and the work equipment directive
The machinery directive
The work equipment directive
Safety and automated systems
Groupe Schneider, safety specialists
“Mushroom head”
emergency stop
button
Two-handel control
Safety module integrated in PLC
Preventa safety module
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: [phone] ● www.stevenengineering.com
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