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MELSEC iQ-R Series

MELSECNET/H Network Module

The MELSECNET/H Network module features improved usability while maintaining compatibility with the MELSEC-Q Series equivalent module (QJ71LP21-25). Existing MELSEC-Q Series assets such as programs, network parameters, and cables can be utilized, making replacement with the MELSEC iQ-R Series easier.

Easily connect to MELSECNET/H Network system

MELSEC iQ-R Series modules can be added to the existing MELSECNET/H Network consisting with MELSEC-Q Series modules. A redundant system is supported, allowing replacement of the existing MELSEC-Q Series redundant CPUs.


MELSECNET/H network module specifications

Item RJ71LP21-25
Communication speed (bps) 25 M/10 M (MELSECNET/10 mode 10 M)
Network topology Duplex loop
Communication cable Optical fiber cable
Max. station-to-station distance 25 Mbps 200 m (SI optical fiber cable), 400 m (H-PCF optical fiber cable),
1 km (broadband H-PCF optical fiber cable),
1 km (QSI optical fiber cable/broadband silica glass optical fiber cable)
10 Mbps 500 m (SI optical fiber cable, 1 km (H-PCF optical fiber cable),
1 km (broadband H-PCF optical fiber cable)
1 km (QSI optical fiber cable/broadband silica glass optical fiber cable)
Overall cable distance (km) 30
Max. number of connectable stations 64 (control station: 1, normal station: 63)
Maximum link points per network
Link relay (LB) 16384 points (MELSECNET/10 mode: 8192 points)
Link register (LW) 16384 points (MELSECNET/10 mode: 8192 points)
Link input (LX), link output (LY) 8192 points
Network mode PLC to PLC network
Function
Firmware update*1 ‚óŹ*1
*1: For more information, please refer to the relevant product manual
* Some functions of the MELSEC-Q Series equivalent module (QJ71LP21-25) are not supported. For more information, please refer to the relevant product manual.