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*1 The remote master station includes both the multiplexed remote master station and the multiplexed remote sub-master
station.
*2 Use one of 64 remote I/O stations as a multiplexed remote sub-master station in the multiplexed remote I/O network.
*3 Use one of 32 remote I/O stations as a multiplexed remote sub-master station in the multiplexed remote I/O network.
*4 When the coaxial bus system is used, the cable length between stations is limited depending on the number of
connected stations.
*5 SI optical fiber cables (former type: A-2P-) take different station-to-station distances according to the type (L or H
type).
Max. number of
networks
239
Network topology Duplex loop Single layer bus
Communication
method
Token ring Token bus
Synchronization
method
Frame synchronization method
Encoding method NRZI (Non Return to Zero Inverted) code Manchester code
Transmission format HDCL standards (frame format)
Error control system
CRC (X
16
+ X
12
+ X
5
+ 1) and retry caused by timeout
RAS function
• Loopback function to be executed upon error detection or cable disconnection (optical loop system only)
• Station cutoff function to be executed upon error detection or cable disconnection (coaxial bus system only)
• Diagnostic function that checks the link line of the host station
• Error detection with the link special relay and link special register
• Redundant power supply for a remote I/O station
• Online module change on a remote I/O station
Application function Remote password for a remote I/O station
Transient transmission
• 1: 1 communication (such as monitoring and program upload or download)
• ZNFR instruction, ZNTO instruction, JP/GP.ZNFR instruction, JP/GP.ZNTO instruction
Internal current
consumption (5VDC)
0.89A 1.10A
External
dimensions
H 98mm
W 27.4mm
D 90mm
Weight 0.15kg 0.16kg
( Reference manual for the MELSECNET/10 network system used)
( Reference manual for the MELSECNET/10 network system used)
Item
Optical loop system Coaxial bus system
QJ72LP25-25 QJ72LP25G QJ72LP25GE QJ72BR15