Hitachi IR.Station, Hardware Manual

Page: 36 / 54

5 CABLING
- 26 -
5.1 Grounding and Wiring the Power Module
LG lines and FG lines must be grounded separately to prevent their mutual interference. The
LG terminals are provided to eliminate power noises and the FG terminals are to eliminate line
noises.
Ground them as short as possible with thick cables (2 mm
2
or more in the casing and 5.5 mm
2
or more outside the casing).
An example of wiring when a mount base contains a CPU unit and an I/O unit
When mounting a CPU unit and an I/O unit on a mount base, connect the FG terminal of the
IR.LINK module of the CPU unit to the FG terminal of the CPU unit mount base and the FG
terminal of the IR.Station module of the I/O unit to the FG terminal of the I/O unit mount
base respectively. This connection puts their grounding potentials at the same level, makes
the grounding performance higher, and consequently increases the noise resistance.
TX
RX
ERR
IR.LINK
MODU
NO
BIT
RA TE
LQE040
N1
HITACHI
LQS021
IR.Station
U
L
TX/RX
ERR
BIT
RATE
PS LQV000
POWER
ON
OFF
H
N
LG
FG
AC100- 120V
DC5V
GND
SERVICE
CHECK
POWER
D.INPUT
LQX100
100- 120 VA C
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
D.INPUT
LQX100
100- 120 VA C
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
LG
FG
LG
FG
FG
FG
FG
See "Power supply cabling."
2
LG
See "Power supply cabling."
PS LQV000
POWER
ON
OFF
H
N
LG
FG
AC100-120V
DC5V
GND
SERVICE
CHECK
POWER
HITACHI
S10m ini
LQP000
LADDER
M ODE
PROTECT
RESET
STOP
RUN
SIM U
NORM
OFF ON
CPU-S
D.INPUT
LQX100
100- 120 VA C
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
PS CPU IR.LINK IO
PS
FG
FG
100 VAC
50 Hz/60 Hz
Twisted-paircable
(100 m at maximum)
(A11)
Twisted-paircable
(100 m at maximum)
100 VAC
50 Hz/60 Hz
TB
(Collective
connection
of LG lines)
FG/LG cable size
Cable inside the mount base: 2 mm or more
Cable outside the mount base: 5.5 mm or more
2
TB
(Collective
connection
of FG lines)
IR.Station
IO IO
The SHD terminals (A5 and A8) for connecting
cables of the IR.LINK module are internally
connected to the FG terminal (A9).
The SHD terminal (B9) for connecting cables
of the IR.Station module are internally
connected to the FG terminal (A9).
STNO.
(A9)