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An example of wiring when modules in different I/O units are connected
When connecting modules in different I/O units, leave the FG terminal of the IR.Station
module open. If connected, the noise resistance will decrease because of different
grounding potentials.
Ground the FG terminal of one of the terminating units only.
Twisted-paircable
(100 m at maximum)
100 VAC
50 Hz/60 Hz
TB
(Collective
connection
of LG lines)
LG
See "Power supply cabling."
If grounding is not perfect, you may get an electric shock and be injured. In an
extreme case, you will be put to death. Improper grounding may allow noises to
disturb the system.
Follow instructions below to ground the LG (Line Ground), FG (Frame Ground),
and SHD (Shield) terminals.
Ground the body of the mount base. Do not remove the insulation sheet from
the mount base to insulate the mount base.
Ground the LG and FG terminals separately (with different grounding wires).
The LG terminal is to eliminate power noises. The FG and SHD terminals are
to eliminate line noises. Be sure to ground them separately to prevent their
mutual interference.
Ground one FG terminal of the IR.Station module for each line.
Always turn off power to the system before mounting or demounting the modules
and cables. Otherwise, you may get an electric shock when you involuntarily
touch the power terminal or the system may be damaged by a short-circuiting or
noises. Be sure to turn off and make sure power is not alive before starting the
job.
PS
IR.Station
LQV000
LQS021
PS
TX/RX
POWER
ERR
BIT
HITACHI
RATE
DC5V
SERVICE
CHECK
GND
ON
POWER
OFF
Do not ground the FG terminal
H
of the IR.Station module.
AC100-120V
N
LG
LG
FG
FG
FG/LG cable size
Cable inside the mount base: 2 mm or more
Cable outside the mount base: 5.5 mm or more
REQUIREMENT
DANGER
- 27 -
IO
IO
D.INPUT
D.INPUT
LQX100
LQX100
IR.Station
0
4
8
C
0
4
8
C
1
5
9
D
1
5
9
D
U
2
6
A
E
2
6
A
E
ST.NO
3
7
B
F
3
7
B
F
L
100- 120 VA C
100- 120 VA C
FG
2
2
See "Power supply cabling."
5 CABLING
TB
(Collective
connection
of FG lines)
FG
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Troubleshooting
