Application Examples; Sto According To Stop Category 0; Sto Direct Stop - BONFIGLIOLI Agile Applications Manual

10 Application Examples

The following examples illustrate how the functions "Safe Torque Off (STO)" and "Safe Stop 1 (SS1)"
work. According to EN 60204, stop functions are divided in different categories. By suitable safety con-
trol devices, stop categories 0 and 1 can be realized in combination with the frequency inverter AGL.

10.1 STO according to Stop Category 0

10.1.1

STO Direct Stop

The Application example shows the minimum circuitry for Agile Frequency inverter for realization of the
safety function STO – "Safe Torque Off" with an emergency stop device in a common electrical cabinet
according to EN ISO 13849-1 PL d and Category 3 or IEC 61508 SIL 2.
When operating the emergency stop device with two stop channels both release paths paths STOA and
STOB of the Agile frequency inverter are interrupted and the integrated safety function is triggered by
interrupting the inverter release. A (non-safe) feedback to a process control can be done via a connected
field bus. When STO is requested, the process controller can no further influence the inverter release
inside the frequency inverter.
Terminal X11.1 can be used for DC 24 V supply of the safety control unit. Please comply
with chapter 7.3.1.
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