Mitsubishi Electric Melsec A Series - Page 26

INTRODUCTION
1 - 9
1
(3) Twisted cable system
(a) 2-tier system 1: System configuration example using local stations only
(b) 2-tier system 2: System configuration example using remote I/O stations only
MELSECNET/B MELSECNET/H System configuration precautions
Twisted
Optical loop
New installation: The installation has to be
changed for an optical loop system or a
coaxial bus system.
Coaxial bus
Twisted cables (using existing
cables)
Existing cables: Process the terminals for
MELSECNET/H connection.
Twisted cables (using CC-Link
dedicated cables)
New installation: Change the cables to CC-
Link dedicated cables.
MELSECNET/B MELSECNET/H System configuration precautions
Twisted
Optical loop
1) New installation: The installation has to
be changed for an optical loop system or
a coaxial bus system.
2) Wire-saving: Changing to a wire-saving
network by using CC-Link or CC-Link/LT
is also recommended.
Coaxial bus
M
L1 L3L2
Network 1 1NS31NS1
1M
P4
1N
S2
1MP4
1NS1 1NS31NS2
Network 1
M
L1 L3L2
M
L1 L3L2
M
R1 R3R2
Network 1 1R31R1
1M
R
1R2
1MR
1R1 1R31R2
Network 1