5.INSTALLATION B-65282EN/05
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(1) Grounding of each module
Achieve separation between the frame ground (FG) of the power
system and that of the signal system. Otherwise, noise may
propagate from the power system to the signal system, possibly
causing the unit to malfunction.
(a) Power supply module
Connect the ground terminal of connector CX1A to the
frame ground. This acts as the signal ground. Connect the
ground terminal of the metal frame to the frame ground.
(b) Servo amplifier module and spindle amplifier module
Connect the ground cable of the motor power cable to a
ground terminal of the terminal block of the module.
Connect the other ground terminal of the terminal block to
the frame ground. Connect the ground terminal of the metal
frame to the frame ground.
(c) Regenerative discharge unit and DBM
Connect the ground terminal of the metal frame to the
frame ground.
Frame ground
(FG of the signal
system)
Spindle
motor
Servo
motor
L1 L2 L3 U V W U V W
Metal frame
of Module
CX1A
Grounding terminal
PSM SPM SVM
System ground
Note 2
Frame ground
(FG of the powe
system)
Not used
3
input
ower su
l
NOTE
1 Securing the ground terminal and a cable together is not permitted.
2 The motor flange mounting section may not be able to be connected to the machine
mounting section of the power magnetics cabinet via the mechanical unit at
sufficiently low impedance in a machine. In this case, a cable of a minimum required
length that is at least 1.25 mm
2
thick must be run from the motor flange to the frame
ground of the power magnetics cabinet. The cable must also be separated from the
motor power line as much as possible.