Figure 4-6 An Example Of Ground-Wiring In A Dispersed Installation - Hitachi HSC-2100 Hardware Manual

Example: Ground-wiring for an I/O unit in a dispersed installation
In a dispersed installation, where the cubicles are interconnected by remote I/O cable wiring
and single-point grounding is not applicable to the LPU/CPU unit and I/O unit(s), the SHD
terminal of the remote I/O station module must be left unwired. If it is wired to ground,
this will result in a decrease in noise resistance because of the different grounding
potentials. FG-terminal grounding must be provided only on LPU/CPU unit side.
TB
(collecting
LG wires)
Leave this remote I/O station module's SHD
terminal unwired.
LG

Figure 4-6 An Example of Ground-Wiring in a Dispersed Installation

LWV450 LWS410 LWI400
A
POWER ON
RI/O
0
1
2
3
U
4
STNO
5
L
6
7
D.INPUT
P.SUPPLY E.STATION
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
SHD
6
6
4
TA
7
7
TERM
5
TB
8
8
6
SHD
9
9
7
S0
10
10
C1
FIX
C0
11
11
C2
S1
12
12
OUTPUT 8
HOLD
13 C1
13
9
H
S2
14
14 A
AC100V
128P
IN
N
15 C2
15 B
S3
16
16 C
64P
LG
C3
17 D
17
FG
S4 E
18
18
32P
C4 F
19
19
GND
C3
20
20
HITACHI HITACHI
HITACHI
Sizes of FG/LG cable:
In cubicle: 2 mm
Outside of cubicle: 5.5 mm
DI LWI400 DI
LWO400
B A B A
8 0 8 0 8 0 8
0 8 0
9 1 9 1 9 1 9
1 9 1
A 2 A 2 A 2 A
2 A 2
B 3 B 3 B 3 B
3 B 3
C 4 C 4 C 4 C
4 C 4
D 5 D 5 D 5 D
5 D 5
E 6 E 6 E 6 E
6 E 6
F 7 F 7 F 7 F
7 F 7
D.OUTPUT
D.INPUT
DC12 24V AC100-200V
B B B
A A
C0 B1 C0 B1 C0
C0 C0
A1 A1
0 0 0
B2 B2
0 0
A2 A2
1 1 1
B3 B3
1 1
A3 A3
2 2 2
B4 B4
2 2
A4 A4
3 3 3
B5 B5
3 3
A5 A5
4 4 4
B6 B6
4 4
A6 A6
5 5 5
B7 B7
5 5
A7 A7
6 6 6
B8 B8
6 6
A8 A8
7 7 7
B9 B9
7 7
A9 A9
C1 C1 C1
B10 B10
C1 C1
A10 A10
C2 C2 C2
B11 B11
C2 C2
A11 A11
8 8 8
B12 B12
8 8
A12 A12
9 9 9
B13 B13
9 9
A13 A13
A A A
B14 B14
A A
A14 A14
B B B
B15 B15
B B
A15 A15
C C C
B16 B16
C C
A16 A16
D D D
B17 B17
D D
A17 A17
E E E
B18 B18
E E
A18 A18
F F F
B19 B19
F F
A19 A19
C3 C3 C3
B20 B20
C3 C3
A20 A20
HITACHI HITACHI
2
or more
2
or more
4-7
DO LWO400 DO
B A B
8 0 8 0 8
9 1 9 1 9
A 2 A 2 A
B 3 B 3 B
C 4 C 4 C
D 5 D 5 D
E 6 E 6 E
F 7 F 7 F
D.OUTPUT
AC100-200V
B
A
B1 C0 B1
C0
A1 A1
0
B2 B2
0
A2 A2
1
B3 B3
1
A3 A3
2
B4 B4
2
A4 A4
3
B5 B5
3
A5 A5
4
B6 B6
4
A6 A6
5
B7 B7
5
A7 A7
6
B8 B8
6
A8 A8
7
B9 B9
7
A9 A9
C1
B10 B10
C1
A10 A10
C2
B11 B11
C2
A11 A11
8
B12 B12
8
A12 A12
9
B13 B13
9
A13 A13
A
B14 B14
A
A14 A14
B
B15 B15
B
A15 A15
C
B16 B16
C
A16 A16
D
B17 B17
D
A17 A17
E
B18 B18
E
A18 A18
F
B19 B19
F
A19 A19
C3
B20 B20
C3
A20 A20
HITACHI
4 WIRING
TB
(collecting
FG wires)
FG