ABB FPTC-01, User Manual

Page: 76 / 108

Maintenance 75
This is a recommendation and depends on the required (not
achieved) SIL/PL. For example, contactors, breakers, safety
relays, contactor relays, emergency stop buttons, switches etc. are
typically safety devices which contain electromechanical outputs.
The FPTC-01 and FSO modules and the STO circuit of the drive
do not contain electromechanical outputs.
Competence
The maintenance and proof test activities of the safety function
must be carried out by a competent person with expertise and
knowledge of the safety function as well as functional safety, as
required by IEC 61508-1 clause 6 and Ex regulations.
Residual risk
The safety functions are used to reduce the recognized hazardous
conditions. In spite of this, it is not always possible to eliminate all
potential hazards. Therefore the warnings for the residual risks
must be given to the operator.
Intentional misuse
The safety circuit is not designed to protect a machine against
intentional misuse.
Decommissioning
When you decommission the module, make sure that the safety of
the machine is maintained until the decommissioning is complete.
Mark clearly on the module that it is decommissioned.