CHAPTER 3 INSTALLATION
3.3 Noise Countermeasures
11
3.3 Noise Countermeasures
3.3.1 Connection of Frame Ground (FG)
The frame should basically be grounded at one earth point.
The GND of the base I/O unit and device GND connected to the stabilized power supply should be
connected to the FG.
0
0
0
C
F
3
1
C
F
3
2
C
F
3
4
C
F
3
3
S
V
2
S
V
1
HR3
□□
RIO1
RIO2
DCIN
CF10
ENC
CR31
SKIP
FG cable
R220 cable
(24VDC cable)
Short bar
FG cable
AC input
HR292/293
FG cable
AC input
FG cable
NC power supply
PD25A
FG cable
ACIN
ON/OFF SW
ON/OFF
POWER
DCOUT
0V
Stabilized power supply
(Prepare separat ely)
Main grou nding plate
f or distribution panel
24
V
D
C
(+
)
DCIN
(BOARD)
CF25
POS
ON/OFF
CF24
DCIN
(PD25A)
CF01
CF13
DCOUT
PE
(FG)
J2
CF11
CF12
CON1
CON1
CF21
CF22
K/B
MOUSE
HANDLE
RIO3
FG
NC keyboard
FCU6-KB004/014
Display unit
FCU6-DUN31/DUC32
Base I/O unit
FCU6-DX2 /DX3 /DX4
Control unit
FCU6-MU0