Safety instructions
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RS4/AS-i
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3.3
Areas of application (AS-Interface)
The AS-i safety monitor, when used in accordance with the specifications, allows for the
operation of the sensor-controlled personnel protection facilities and other safety compon-
ents up to and including category 4 in accordance to EN 954-1. If sensors of a lower
category should be used, the maximum category to be attained for the related safety path
is defined in terms of these sensors. For example, laser scanners in accordance to EN
61496-3 can only be classified as type 3 at best. If laser scanners are incorporated in the
AS-i safety network, a safety category of 3 is the maximum that may be attained for the
related safety path. If there is a safety light curtain of type 4 connected to the same AS-i
safety monitor, it remains unaffected by this, and may still be classified as category 4. The
AS-i safety monitor also takes responsibility for the EMERGENCY STOP function,
obligatory for all machines not operated by hand (stop category 0 or 1), for the dynamic
monitoring of the restart function and for the external device monitoring function (EDM). In
what follows we will give a few examples of the use of the AS-i safety monitor.
AS-i Safety at Work can be economically used in all cases where the standard AS-i bus
recommends itself in view of its advantages as a local bus that requires little cabling. In this
way, when the AS-i safety monitor is used, AS-i bus configurations that already exist as bus
user devices can easily be added to, and safety components with the appropriate AS-i
Safety at Work interface (e.g. COMPACT/AS-i) can easily be incorporated in the loop. If the
safety component does not have an AS-i Safety at Work interface, what are known as
coupling modules (e.g. the AS-i coupling module ASKM1) can effect the connection.
Existing AS-i Masters and AS-i power supplies can as a rule be reused. In terms of
industrial sector there are no limitations. Let us mention here a few of the more important
areas of use:
• Expanded machining machines with multiple control elements and safety sensors for
wood and metal applications
• Printing and paper processing machines, cutting machines
• Packaging machines, single and as part of a system
• Food processing equipment
• Piece and bulk material transport systems
• Machinery in the rubber and plastics industry
• Assembly machines and manipulators
3.4
Organisational measures
Documentation
It is an absolute requirement that regard should be had to all the statements made in this
Connecting and Operating Manual, in particular in the chapters “Safety Notices” and “AS-i
System Integration”. Please look after this Connecting and Operating Manual and treat it
with care. It should be available at all times.
Safety prescriptions
You should have regard to the statutory stipulations that apply locally and to the
prescriptions of the relevant professional associations.
Qualified personnel
The assembly, startup and maintenance of the equipment should be carried out only by
qualified professional personnel. Electrical work may be carried out only by a professional
electrician.
