Omron C200HW-SRM21-V1 - 08-2007 - Page 51

30
System Configuration Section 2-2
Note If the number of connected Slaves does not exceed 16 when using the High-
speed Communications Mode, the main line length can be up to 100 m and
the total branch line length can be up to 50 m (i.e., the same as for the VCTF
cable). An example is given below.
Refer to the following examples.
•Example 1
•Example 2
Do not mix 2-conductor VCTF, 4-conductor VCTF, and Special Flat Cables in
the same system.
Refer to the Appendix Standard Models for details on compatible communica-
tions cables.
Note When 4-conductor VCTF or Special Flat Cable is used to supply the Slave’s
communications power, the length of the cable may be limited by current and
voltage drops in the cable and connectors. Refer to 2-3-3 Limitations of Com-
munications Cable Power Supply on page 35 for details.
Long-distance
Communications
Mode
2-conductor VCTF cable 500 m max. 6 m max. 120 m max.
4-conductor VCTF cable Total length of communications cable: 200 m max.
(with no distinction between main and branch lines)
Flat Total length of communications cable: 200 m max.
(with no distinction between main and branch lines)
Communication
mode
Cable type Cable length
Main line Branch line Total of branch lines
No. of Slave
Units
8-input Slave × 5 Units + 8-output Slave × 5 Units + 16-input Slave
× 2 Units + 16-output Slave × 2 Units = 14 Slave Units
Number of I/O
points
72 inputs and 72 outputs
Special Flat Cable
Main line length: 100 m max.
Branch
3 m max.
Slave (8
outputs)
Slave (8 outputs) × 5 Units Slave (8 inputs) × 5 Units
Total branch line length: 50 m max.
Slave (8
outputs)
Slave (8
outputs)
Slave (8
inputs)
Slave (8
inputs)
Slave (8
inputs)
Slave (16
inputs)
Slave (16
outputs)
Slave (16
inputs)
Slave (16
outputs)
L
2
L
5
L
6
L
7
L
10
L
11
L
12
L
13
L
14
Termi-
nator
Master
L
1
length:
No. of Slave
Units
16-input Slave × 8 Units + 16-output Slave × 8 Units = 16 Slave
Units
Number of I/O
points
128 inputs and 128 outputs
Special Flat Cable
Branch length:
3 m max.
Slave
(
16 out
p
uts
)
× 8 Units
L
2
L
8
L
9
L
10
L
16
Slave
(
16 in
p
uts
)
× 8 Units
Slave (16
outputs)
Slave (16
outputs)
Slave (16
outputs)
Slave (16
inputs)
Slave (16
inputs)
Slave (16
inputs)
Main line length: 100 m max.
Total branch line length:
50 m max.
Master
Te r m i -
nator
L
1