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be designed so that a single failure in the control system
does not lead to a loss of safety function(s), and whenever
reasonably practicable, a single failure is detected during or
prior to the next demand upon the safety function, or if this
is not possible, an accumulation of faults does not lead to
the loss of the safety function(s).
Requirements on sensors / signal generators
The sensors / signal generators being connected must meet
the following requirements:
– Only signal generators that are suited for the respective
required safety level may be used.
– Positively opening control switches must be used in
accordance with IEC 60947-5-1 (designated with this
symbol:
).
– Only use components that have been proven in operation.
– Depending on the established risk level, switches (e.g. for
position monitoring) may have to have a redundant
design.
– Depending on the required safety level, control devices
may have to have a redundant design. In this regard,
make sure to take into account the applicable C stan-
dards.
2.5
Legal notice
The u-remote series products are CE-compliant in accor-
dance with Directive 2014/30/EU (EMC Directive) and
Directive 2014/35/EU (Low Voltage Directive). They also
meet the requirements of the ATEX Directive 2014/34/EU.
1484600000/04/06.2017
u-remote IP20 modules for functional safety manual
2 Safety | Legal notice
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