BONFIGLIOLI Agile Series, Руководство по функциональной безопасности приложения

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24 AGL-STOV0-01SV0-05
06/12
7.2 External Safety Control Equipment
Safety control equipment, upon request (e.g. actuation of emergency stop or access
to hazard area, must trigger appropriate responses in order to protect people, the
machine and the environment. They evaluate sensor signals or safely switch off dan-
gerous states.
External safety control devices must meet the following requirements:
− External safety control equipment and safety modules for control of the digital
inputs (STO) must meet one of the following classifications, to meet the classifi-
cation of the ACU device:
o
PL d according to EN ISO 13849-1
o
SIL 2 according to IEC 61508
o
the whole installation meets these requirements.
− The switching capacity of the safety control equipment must be designed for the
maximum permissible, limited output current of the DC 24 power supply. Comply
with the instructions of the manufacturer of the safety control equipment on the
permissible contact load and any safeguards to be provided for the safety con-
tacts.
−
The emergency stop device must comply with Standard EN ISO 13850.
− If a safety request (e.g. emergency stop actuated or sensor signals that safety
door is open) is reset (emergency stop unlocked, safety door closed) this alone
shall not result in a restart of the drive. Restart may only occur after the safety
control device has been reset.
External safety control devices evaluate sensors:
Examples of contact sensors:
− Emergency stop control device for stop in dangerous situations
− Position switch, e.g. for monitoring slide doors, safety grids or moving machine
parts
Examples of no-contact sensors:
− Light barriers, e.g. for monitoring areas with dangerous movements
− Light curtains
7.3 External DC 24 V power supply
During projection and installation of a DC 24 V supply connected to the frequency
inverter comply with the following instruction. This also includes supply of a safety
control device the output of which is connected to a control input (including STOA
and STOB) of the frequency inverter.
Atten-
tion!
Use a suited SELV/PELV voltage supply, which rated voltage has to be DC
24 V ±10 %. The largest overvoltage must not exceed DC 32 V in the
case of a fault (one fault safety) . The one fault safety has to be realized
with an overvoltage protection of the mains supply (overvoltage protec-
tion OVP with limiting the output voltage to a maximum of DC 32 V) or
an external wiring like a Crowbar. An adequate overvoltage category of
the voltage supply has to be ensured.