viii ACS 300 User’s Manual
Safety Instructions
Disconnect Device A supply disconnecting device shall be installed in each sup-
ply, by which the electric parts of ACS 300 can be discon-
nected from the AC line during installation and maintenance
work. The disconnecting device shall conform to the require-
ments of all applicable electrical codes. The supply discon-
necting device shall be locked in the open position while
installation and maintenance work is going on.
Emergency Stop
Devices
The ACS 300 start/stop control circuitry consists of elec-
tronic components. An additional hardwired electromechani-
cal stop circuit is required to remove AC line power from the
drive if there are hazards of personnel accidently contacting
the moving parts of the driven machinery or if there is any
other potential hazard that requires the installation of emer-
gency stop devices. When the drive is stopped by discon-
necting power, no braking is available and the motor will
coast to a stop. If emergency stop braking is required, a
spring set friction brake should be used.
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