Mitsubishi Electric MELSEC-A Series Manual page 26

1
INTRODUCTION
(3) Twisted cable system
(a) 2-tier system 1: System configuration example using local stations only
MELSECNET/B
Twisted
M
L1
(b) 2-tier system 2: System configuration example using remote I/O stations only
MELSECNET/B
Twisted
M
R1 R2
1
- 9
MELSECNET/H
Optical loop
1N 1
S
Coaxial bus
1M 4
P
Network 1
1N 1
S
Twisted cables (using existing
cables)
L2 L3
M
L1
Twisted cables (using CC-Link
dedicated cables)
M
L1
MELSECNET/H
Optical loop
1R1
Coaxial bus
R3
1M
R
Network 1
1R1
System configuration precautions
1M 4
P
Network 1 1N 3
S
New installation: The installation has to be
1N 2
S
changed for an optical loop system or a
coaxial bus system.
1N 2 1N 3
S S
Existing cables: Process the terminals for
MELSECNET/H connection.
L2 L3
New installation: Change the cables to CC-
Link dedicated cables.
L2 L3
System configuration precautions
1M
R
Network 1 1R3
1) New installation: The installation has to
be changed for an optical loop system or
a coaxial bus system.
1R2
2) Wire-saving: Changing to a wire-saving
network by using CC-Link or CC-Link/LT
is also recommended.
1R2 1R3