Product Description
The Mitsubishi Electric QJ71LP21-25 is a MELSECNET/H optical loop type network module designed for use in the MELSEC-Q series programmable controller platform. It functions as a control or normal station in PLC-to-PLC networks and as a remote master station in remote I/O networks, supporting both MELSECNET/H and MELSECNET/10 operating modes. The module provides high-speed digital data communication at up to 25 Mbps across a duplex optical loop topology, connecting up to 64 stations over a maximum overall network distance of 30 km.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Mitsubishi Electric |
| Model / Part Number | QJ71LP21-25 |
| Product Type | MELSECNET/H Network Module (Optical Loop Type) |
| Series / Product Line | MELSEC-Q |
| Signal Type | Digital |
| Communication Standard | MELSECNET/H, MELSECNET/10 |
| Communication Speed | 25 Mbps / 10 Mbps (selectable via MODE switch) |
| Network Topology | Optical Loop (Duplex Loop) |
| Communication Method | Token Ring |
| Synchronization Method | Frame Synchronization |
| Coding Method | NRZI (Non Return to Zero Inverted) |
| Transmission Format | HDLC Standards (Frame Format) |
| Error Control | CRC (X^16 + X^12 + X^5 + 1) and Retry by Timeover |
| Max Stations per Network (PLC-to-PLC) | 64 stations (1 control station + 63 normal stations) |
| Max Stations per Network (Remote I/O) | 65 stations (1 remote master + 64 remote I/O stations) |
| Max Link Points per Network — LX/LY | 8,192 points |
| Max Link Points per Network — LB | 16,384 points |
| Max Link Points per Network — LW | 16,384 points |
| Overall Network Distance | 30 km |
| Distance Between Stations (SI Optical Cable) | 200 m @ 25 Mbps / 500 m @ 10 Mbps |
| Distance Between Stations (H-PCF Optical Cable) | 400 m @ 25 Mbps / 1 km @ 10 Mbps |
| Distance Between Stations (Broad-band H-PCF / QSI) | 1 km |
| Network Cable Type | Optical Fiber Cable (user-procured): SI, H-PCF, Broad-band H-PCF, QSI |
| Applicable Connector | 2-core Optical Connector Plug F06/F08 or equivalent (JIS C5975/5977) |
| Maximum Number of Networks | 239 (total, including PLC-to-PLC networks) |
| I/O Points Occupied | 32 points (Intelligent Function Module: 32 points) |
| 5 VDC Internal Current Consumption | 0.55 A |
| Operating Temperature | 0°C to 55°C |
| Dimensions (W × H × D) | 27.4 mm × 98 mm × 90 mm |
| Weight | 0.11 kg (0.25 lbs) |
| Certifications | CE, UL/cUL, EAC, UKCA |
| Compatible CPU | MELSEC-Q Series QCPU (QnU compatible) |
We warranty all items for 30 days from date of purchase.
Other Details
We warranty all items for 30 days from date of purchase. If you experience any issues with your item within this period, please contact us and we will work with you to resolve the problem. This warranty covers defects in functionality but does not cover damage caused by misuse, improper installation, or normal wear and tear.Product Videos
Custom Field
GTIN 679523686161
Country/Region of Manufacture Japan
Dimensions 27.4 x 98 x 90 mm (W x H x D)
Current 0.55 A
Manufacturer Mitsubishi
Empty Weight 0.11 kg (0.25 lbs)
Part Number QJ71LP21-25
Controller Platform MELSEC-Q
Series MELSEC-Q
Shelf E-6
Communications 25 Mbps / 10 Mbps
Model QJ71LP21-25
MPN QJ71LP21-25
Type Network Module
