Grounding And Wiring The Power Module - Hitachi IR.Station Hardware Manual

5 CABLING

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
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.
Twisted-paircable
(100 m at maximum)
100 VAC
50 Hz/60 Hz
Twisted-paircable
(100 m at maximum)
100 VAC
50 Hz/60 Hz
LG
See "Power supply cabling."
PS
LQV000 PS
LQP000
POWER
HITACHI
DC5V
SERVICE
CHECK
GND
ON
POWER
OFF
H
AC100-120V
N
LG
LG
FG
FG
PS
LQV000 PS
LQS021
POWER
HITACHI
DC5V
SERVICE
CHECK
GND
ON
POWER
OFF
H
AC100- 120V
N
LG
LG
FG
FG
TB
(Collective
FG/LG cable size
connection
Cable inside the mount base: 2 mm or more
of LG lines)
Cable outside the mount base: 5.5 mm or more
2
or more in the casing and 5.5 mm
CPU IR.LINK
LADDER CPU-S LQE040 IR.LINK
LQX100
RUN
STOP
MODE
TX
SIMU
NORM MODU
N1 RX
NO
PROTECT
ERR
ON OFF
BIT
RESET
RA TE
100- 120 VA C
S10m ini
The SHD terminals (A5 and A8) for connecting
cables of the IR.LINK module are internally
connected to the FG terminal (A9).
(A11)
FG
IR.Station
IO
D.INPUT
IR.Station LQX100 LQX100
0 4 8 C
TX/RX
1 5 9 D
U
2 6 A E
ERR
STNO.
3 7 B F
BIT
L
RATE
100- 120 VA C 100- 120 VA C
The SHD terminal (B9) for connecting cables
of the IR.Station module are internally
connected to the FG terminal (A9).
(A9)
FG
2
2
- 26 -
IO
D.INPUT
0 4 8 C
9 D
1 5
2 6 A E
3 7 B F
FG
IO
D.INPUT
0 4 8 C
1 5 9 D
2 6 A E
3 7 B F
FG
TB
(Collective
connection
of FG lines)
FG
See "Power supply cabling."
2