Factory Automation

Controllers MELSEC iQ-R Series Product features -Network-

MELSECNET/H network module (Optical loop type)

This module supports the PLC to PLC network in a MELSECNET/H network*1.

  • *1.Remote I/O network is not supported.

RJ71LP21-25

Easily utilize MELSEC-Q Series programs

  • Easy addition
  • Easy replacement
  • MELSEC iQ-R Series modules can be added to the existing MELSECNET/H network consisting with MELSEC-Q Series modules
  • A redundant system is also supported, allowing replacement of the existing MELSEC-Q Series redundant system

The module in the red box is the MELSECNET/H network module (RJ71LP21-25).

MELSECNET/H network module (Coaxial bus type)

Coaxial bus cables are less expensive than optical fiber cables, allowing system configuration at a low cost.

RJ71BR11

Easily utilize MELSEC-Q Series programs

  • Easily added
  • Easily replaced
  • The MELSEC iQ-R Series modules can be added to the existing MELSECNET/H network consisting of the MELSEC-Q Series modules. Replacement is also possible

Specifications<sup>MELSECNET/H network module specifications</sup>

Item RJ71LP21-25 RJ71BR11
Compatible network MELSECNET/H MELSECNET/H
Communication speed (bps) 25M/10M (MELSECNET/10 mode: 10M) 10M
Maximum stations per network 64 32
Network topology Duplex loop Single bus
Connection cable Optical fiber cable Coaxial cable
Max. station-to-station distance (m) 10 Mbps:
500 (SI optical fiber cable)
1000 (H-PCF/broadband H-PCF/QSI
/broadband silica glass optical fiber cable)		 3C-2V: 300
5C-2V: 500
5C-FB, S-5C-FB: 500
Overall cable distance (m) 30000 3C-2V: 300
5C-2V: 500
5C-FB, S-5C-FB: 500
Can be extended up to 2.5 km with a
repeater unit (A6BR10, A6BR10-DC)
Maximum link points per network
Link relay (LB) 16384 points (MELSECNET/10 mode: 8192 points) 16384 points (MELSECNET/10 mode: 8192 points)
Link register (LW) 16384 points (MELSECNET/10 mode: 8192 points) 16384 points (MELSECNET/10 mode: 8192 points)
Link input (LX), link output (LY) 8192 points 8192 points