System Configuration; Single Remote I/O Networks; Configuration - Mitsubishi Electric MELSEC Q Series Reference Manual

2 SYSTEM CONFIGURATION

2 SYSTEM CONFIGURATION
2

2.1 Single Remote I/O Networks

2.1.1 Configuration

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This introduces a system comprised of remote I/O networks.
POINT
(1) Remote I/O networks and PLC to PLC networks cannot be mixed on the same
MELSECNET/H network. Always build separate networks.
(2) Only MELSECNET/H network modules can be connected to a MELSECNET/H
remote I/O network. They cannot be mixed with MELSECNET/10 network
modules (AJ72LP25, A1SJ72QLP25, etc.).
(1) Optical loop system
Up to 64 remote I/O modules can be connected to a remote master station.
Always set the station number of the remote master station to 0.
Station number 0
(remote master station)
QCPU QJ71
LP21
QJ72
I/O
LP25
Station number 64
(remote I/O station)
(2) Coaxial cable bus system
Up to 32 remote I/O stations can be connected to a remote master station.
Always set the station number of the remote master station to 0.
Station number 0
(remote master station)
QCPU QJ71
BR11
Terminating resistor
(Sold separately)
Station number 1
(remote I/O station)
QJ72 I/O I/O
LP25
Optical fiber cable
QJ72
I/O I/O I/O
LP25
Station number 4
(remote I/O station)
Station number 1
(remote I/O station)
QJ72
I/O I/O
BR15
Coaxial cable
MELSEC-Q
Station number 2
(remote I/O station)
QJ72 I/O I/O
LP25
QJ72
I/O I/O
LP25
Station number 3
(remote I/O station)
Station number 32
(remote I/O station)
QJ72
I/O I/O
BR15
Terminating resistor
(Sold separately)
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