
B-65342EN/01 SPECIFICATIONS 1.SPECIFICATIONS
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1.3 SUB MODULE SM
To drive B
iS series, it is necessary to connect a Sub module
SM(SSM) between motor and amplifier for safety and machine
protection.
Synchronous motor has permanent magnets inside of the rotor. So, if
the motor runs freely by its inertia because of some power source
trouble, the motor turns itself into generator and the high voltage
comes back on power line terminal. In order to avoid this dangerous
state, SSM is necessary for the driving of synchronous motor. SSM
shorts the circuit of power line when an alarm is detected.
Order No. and dimensions are shown in this manual.
Also refer to the description manuals(*) of the latest version for the
detailed connection and specifications.
(*) SYNCHRONOUS SPINDLE MOTOR driven manual
A-63639-103 and SERVO AMPLIFIER αi series
DESCRIPTIONS (B-65282EN)
WARNING
1 To drive BiS series, be sure to connect SSM
between motor and amplifier for safety and
machine protection without exception.
2 Even if the motor is driven only in low speed, SSM
must be connected without exception for the safety
measures in case of incorrect operation or
unexpected accident. Never to drive the B
iS series
without SSM.
CAUTION
During 2 minutes from the SSM operation, such
case as some spindle alarm or other emergency
stop, the reset command of alarm is ignored. This
is a standard function and not a trouble. While this
process, if some rotation command is active, the
spindle rotates suddenly after two minutes, so
please be careful. For more details, refer to the
description manual (*) of latest version .
(*) 6.4 clause on SYNCHRONOUS SPINDLE
MOTOR driven manual A-63639-103