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3.3.4 Noise Countermeasures
(1) Connection of frame ground (FG)
The frame should basically be grounded at one earth point. When relaying through the grounding
plate in the middle of the connection route, separate the desktop personal computer/panel
personal computer from the remote I/O unit, and the base I/O unit from the servo drive unit/spindle
drive unit, etc.
The NC Card FG is connected to the personal computer electric cabinet with card installation metal
fittings.
Spindle motor
Servomotor
Note 1: This is not required when directly connecting to the main ground.
Note 2: Connect the motor's grounding cable to the servo drive unit and spindle drive unit.
Note 3: A spacer is used when mounting the HR682 card on the base I/O unit, but when not mounting on the base
I/O unit, connect the card to the main ground using the FG terminal.
3. Installation
3.3 Installation
Remote
I/O unit
Base I/O unit
HR682
Note 3
DCIN
HA ND LE
E M G2
E M G1
RS232C
Servo drive unit/spindle drive unit, etc.
Note 2
Note 2
Main ground
12
Desktop personal computer/
panel personal computer
0
0
CF61
EN C#2
Note 1
Note 1
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