9
vacon • 73
Safe Torque Off
9.5.1
Safety Capability Cat.4 / PL
e
/ SIL 3
For this safety capability, an external safety device must be installed. This must be used to dinami-
cally activate the STO inputs and to monitor the STO output feedback.
The STO inputs are dynamically used when they do not commute together (static use), but according
to the following picture (where the inputs are released with delay in turn). The dynamic use of the
STO inputs allows detecting faults that may otherwise accumulate.
Figure 38.
An emergency push button connected to the STO inputs does not assure the same
quality, because no fault detection is performed at a sufficient frequency
(once a day
is recommended)
.
The external safety device, which forces the STO inputs and evaluates the STO output
feedback, has to be a
safe device
and it has to fulfil the requirements of the specific
application.
A simple switch cannot be used in this case!
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
Содержание 20 x
Страница 2: ...Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com...
Страница 18: ...vacon 15 Receipt of delivery 2 Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com...
Страница 24: ...3 vacon 21 Mounting Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com...
Страница 32: ...4 vacon 29 Power cabling Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com...
Страница 46: ...5 vacon 43 Control unit Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com...
Страница 54: ...6 vacon 51 Commissioning Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com...
Страница 70: ...8 vacon 67 Options Phone 800 894 0412 Fax 888 723 4773 Web www clrwtr com Email info clrwtr com...
