Fuxx Control - ARS 2320 / ARS 2340 Instruction Manual - Kuhnke

KUHNKE Automation Fuxx Control ARS 2320 / ARS 2340
6 Functional safety technology
6.1 General, intended use
The ARS 2300 servo positioning controllers support the "safe stop" safety function with prevention of
unexpected start-up as required by standard EN 954-1, category 3.
The standstill of the machine has to be initiated and ensured by the control system of the machine.
This applies particularly to vertical axes without self-locking mechanism or weight compensation.
In accordance with a danger analysis / risk assessment following the machinery directives 98/37/EEC,
EN ISO 12100, EN 954-1 and EN 1050, the machine manufacturer has to plan the safety system for
the entire machine whilst taking into account all components integrated. Among these are also electric
drives.
The standard EN 954-1 subdivides the requirements placed on control systems into five categories
graduated according to the level of risk (see Table 24 ).
Table 24: Description of the requirements to be met for the categories in accordance with
EN 954-1
Category 1) Summary of requirements System behaviour 2) Principles to
achieve safety
B Safety-related parts of control
systems and/or their protective
equipments, as well as their
components, shall be designed,
constructed, selected, assembled
and combined in accordance with
relevant standards to that they can
withstand the expected influence.
1 The requirements of category B
must be met.
Well-tried components and welltried
safety principles must be
used.
2 The requirements of category B
and the use of well-tried safety
principles shall apply. The safety
function must be checked by the
control system of the machine at
regular intervals.
The occurrence of a fault can lead to
the loss of the safety function.
The occurrence of a fault can lead to
the loss of the safety function but the
probability of occurrence is lower
than for category B.
The occurrence of a fault can lead to
the loss of the safety function
between the checks.
The loss of a safety function is
detected by the checks.
Mainly
characterised by
selection of
components.
Mainly
characterised by
structure
E 732 GB 55
14.12.2006