Functional safety
326
9.
FUNCTIONAL SAFETY
Precautions
318
DDS
HARDWARE
Ref.1310
9.4 Precautions
Safe Torque Off (STO)
DDS system in general
The precautions to bear in mind regarding the installation of Fagor Auto-
mation's
Digital Drive System are described in the section on - SAFETY
CONDITIONS -
in this manual.
DANGER.
The lack of Drive Enable does not isolate the system from mains nor
does it discharge the DC BUS.
Opening the main external contactor - KM1 isolates the system from
mains, but the DC BUS is still alive for the time period indicated on the
front plate of the unit.