Ground Wiring; Figure 4-5 An Example Of Ground-Wiring In A Concentrated Installation - Hitachi HSC-2100 Hardware Manual

4 WIRING

4.3 Ground Wiring

When running ground-wiring, satisfy the following requirements:
Each of the LG (line ground) terminals of a programmable controller is a ground terminal to
isolate power supply noise, and each of the FG (frame ground) terminals is a ground terminal
to isolate network line noise. All of the LG terminals must be grounded separately from the
FG terminals, in order to prevent electromagnetic interference between power supply and
network lines.
The FG terminal of any module requiring FG grounding must be connected, via the shorted
possible route, to the FG terminal of the mount base on which the module is mounted.
The FG terminal of any mount base must be insulated from the cubicle in which the mount
base is installed, and must be grounded by Class D grounding (grounding resistance of 100
ohms or less).
Example: Ground-wiring for the cubicle in a concentrated installation
In cases where an LPU or CPU unit is mounted with an I/O unit in the same cubicle, the FG
and SHD terminals of the LPU/CPU unit and remote I/O station module, respectively, must
be connected to the FG terminals of the mount bases on which they are mounted. Further,
the FG terminals of those mount bases must be grounded at the same point. The reason for
this is to provide the same ground potential for both FG terminals and thereby increase
noise resistance.
TB
(collecting
LG wires)
LG

Figure 4-5 An Example of Ground-Wiring in a Concentrated Installation

PS LPU
U
LQV000 PS LQP510 LADDER
RUN
RUN STOP
PROT
T/M
SIMU
POWER
ALARM
USER
RESET
S10V
ERR
ON
OFF
HITACHI
RI/O
DC5V
SERVICE
UP LINK
CHECK
PCs
GND
(RS-422)
OK
RI/O
STOP
COM
STOP
/RUN
I
ON SHD
POWER
COM
150
O
OFF
SHD
100
150
TOOL
RI/
(RS-232C)
H 02A
100
AC100-120V
N
INPUT RI/
02B
RI/
LG
01A
SHD
FG
RI/
01B
FG
SHD
LWV450 LWS410 LWI400
A
POWER ON
RI/O
U
STNO
L
P.SUPPLY E.STATION D.INPUT
DC12 24V
DC12V A
1 A
1
CHECK
C0
DC5V RI/O
B
2
CHECK 2
IN
0
SHD
3
3
1
A
4
4
2
RI/O
B
5
OUT 5
3
6 SHD
6
4
TA
7
7
TERM 5
TB
8
8
6
SHD
9
9
7
S0
10
10
C1
FIX
C0
11
11
C2
12 S1
12 8
OUTPUT
HOLD
C1
13
13
9
H
S2
14
14 A
AC100V
128P
IN
N
15 C2
B
15
S3
16 C
16
64P
LG
C3 D
17
17
FG
18 S4 E
18
32P
C4 F
19
19
GND C3
20
20
HITACHI HITACHI
HITACHI
Leave this power supply module's
FG terminal unwired.
Sizes of FG/LG cable:
In cubicle: 2 mm
Outside of cubicle: 5.5 mm
I/O I/O I/O
LPU LQX100 D.INPUT LQX100 D.INPUT LQX100 D.INPUT
0 4 8 C 0 4 8 C 0 4 8
1 5 9 D 1 5 9 D 1 5 9
2 6 A E 2 6 A E 2 6 A
3 7 B F 3 7 B F 3 7 B
100-120VAC 100-120VAC 100-120VAC
C0 C0 C0
B1
B1 0
0 0
A1 A1 A1
4 4 4
B2 B2
1 1 1
A2 A2
5 A2 5
5
B3 B3
2 2
2
A3 A3
A3
6 6 6
B4 B4
3 3
3
A4 A4 A4
7 7 7
B5 B5
8 8
8
A5 A5 A5
C C C
B6
B6
9 9 9
A6 A6 A6
D D
D
B7 B7
A A A
A7 A7 A7
E E E
B8 B8
B B B
A8 A8
A8
F F F
B9 B9
C1 C1
C1
A9 A9 A9
DI LWI400 DI LWO400 DO LWO400
B A B A B A
0 8 0 8 0 8 0 8
0 8 0 8 0 8
1 9 1 9 1 9 1 9
1 9 1 9 1 9
2 A 2 A 2 A 2 A
2 A 2 A 2 A
3 B 3 B 3 B 3 B
3 B 3 B 3 B
4 C 4 C 4 C 4 C
4 C 4 C 4 C
5 D 5 D 5 D 5 D
5 D 5 D 5 D
6 E 6 E 6 E 6 E
6 E 6 E 6 E
7 F 7 F 7 F 7 F
7 F 7 F 7 F
D.OUTPUT D.OUTPUT
D.INPUT
AC100-200V AC100-200V
DC12 24V
B B B B
A A A
C0 C0 C0 C0
B1 B1 B1
C0 C0 C0
A1 A1 A1
0 0 0 0
B2
B2 B2
0 0 0
A2 A2 A2
1 1 1 1
B3 B3 B3
1 1 1
A3 A3 A3
2 2 2 2
B4 B4 B4
2 2 2
A4 A4 A4
3 3 3 3
B5 B5 B5
3 3 3
A5 A5 A5
4 4 4 4
B6 B6 B6
4 4 4
A6 A6 A6
5 5 5 5
B7 B7 B7
5 5 5
A7 A7 A7
6 6 6 6
B8 B8 B8
6 6 6
A8 A8 A8
7 7 7 7
B9 B9 B9
7 7 7
A9 A9 A9
C1 C1 C1 C1
B10 B10 B10
C1 C1 C1
A10 A10 A10
C2 C2 C2 C2
B11 B11 B11
C2 C2 C2
A11 A11 A11
8 8 8 8
B12 B12 B12
8 8 8
A12
A12 A12
9 9 9 9
B13 B13 B13
9 9 9
A13 A13 A13
A A A A
B14 B14 B14
A A A
A14 A14 A14
B B B B
B15 B15 B15
B B B
A15 A15 A15
C C C C
B16 B16 B16
C C C
A16 A16 A16
D D D D
B17 B17 B17
D D D
A17 A17 A17
E E E E
B18 B18 B18
E E E
A18 A18 A18
F F F F
B19 B19 B19
F F F
A19 A19 A19
C3 C3 C3 C3
B20 B20 B20
C3 C3 C3
A20 A20 A20
HITACHI HITACHI HITACHI
2
or more
2
or more
4-6
I/O
LQX100 D.INPUT
C 0 4 8 C
D 1 5 9 D
E 2 6 A E
F 3 7 B F
100-120VAC
C0
B1 B1
0
A1
4
B2 B2
1
A2
5
B3 B3
2
A3
6
B4 B4
3
A4
7
B5 B5
8
A5
C
FG
B6 B6
9
A6
D
B7 B7
A
A7
E
B8 B8
B
A8
F
B9 B9
C1
A9
DO
B
0 8
1 9
2 A
3 B
4 C
5 D
6 E
7 F
B1
A1
B2
A2
B3
A3
B4
A4
B5
A5
B6
A6
B7
A7
B8
A8
B9
A9
B10
A10
B11
A11
B12
A12
B13
A13
B14
A14
B15
A15
B16
A16
B17
A17
B18
A18
TB
B19
A19
(collecting
B20
A20
FG wires)
FG