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QJ71LP21-25 Mitsubishi MELSEC-Q Series MELSECNET/H
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Quick facts
| Availability | Confirmed on request |
| Category | Mitsubishi MELSEC-Q Series – Information/network |
| Lifecycle | Active mature |
| Warranty | 12-month (new) · 3-month (used/refurbished) |
Shipping & availability
When can QJ71LP21-25 be shipped?
QJ71LP21-25 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.
Can I pick up QJ71LP21-25 in person?
Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.
Is express delivery available?
Yes — mention it when you request a quote for QJ71LP21-25 and we'll include express shipping options in our reply.
My factory is down and I need this urgently — can you help?
For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for QJ71LP21-25, subject to availability and destination.
The Mitsubishi Electric QJ71LP21-25 is a MELSECNET/H in the MELSEC-Q Series. MELSECNET/H PLC to PLC network, control/normal station, MELSECNET/H remote I/O network, remote master station, optical loop system connection cable: SI/QSI/H-PCF/broadband H-PCF optical cable, transmission path format: duplex loop. Mitsubishi Electric has announced its discontinuation (2028/02 To be end of order) — plan spares now; PartnerPLC also sources it on the surplus market after the end of order. Specifications and manuals below are Mitsubishi Electric's own data.
Specifications
Product
| Series | MELSEC-Q Series |
| Category | MELSECNET/H |
| Type | Optical loop (SI/QSI cable) |
| Sales status | 2028/02 To be end of order (Mitsubishi Electric) |
| Outline | MELSECNET/H PLC to PLC network, control/normal station, MELSECNET/H remote I/O network, remote master station, optical loop system connection cable: SI/QSI/H-PCF/broadband H-PCF optical cable, transmission path format: duplex loop |
Specifications
| Maximum number of link points per network: LX/LY | 8192 points |
| Maximum number of link points per network: LB | 16384 points (MELSECNET/10 mode: 8192 points) |
| Maximum number of link points per network: LW | 16384 points (MELSECNET/10 mode: 8192 points) |
| Maximum number of link points per station: PLC to PLC network | • MELSECNET/H mode, MELSECNET/10 mode: {(LY+LB)/8+(2×LW)}≦2000 bytes • MELSECNET/H Extended mode: {(LY+LB)/8+(2×LW)}≦35840 bytes |
| Maximum number of link points per station: Remote I/O network | • Remote master station to remote I/O station: {(LY+LB)/8+(2×LW)}≦1600 bytes • Remote I/O station to remote master station: {(LX+LB)/8+(2+LW)}≦1600 bytes • Multiplexed remote master station to multiplexed remote sub-master station, multiplexed remote sub-master station to multiplexed remote master station: {(LY+LB)/8+(2×LW)}≦2000 bytes |
| Maximum I/O points per remote I/O station | X + Y ≦ 4096 points If the X/Y numbers are duplicate, only one side is taken into consideration. |
| Device points per remote I/O station: M | 8192 points |
| Device points per remote I/O station: SM | 2048 points |
| Device points per remote I/O station: D | 12288 points |
| Device points per remote I/O station: SD | 2048 points |
| Communication speed | 25 Mbps/10 Mbps (MELSECNET/10 mode: 10 Mbps) |
| Maximum number of connectable stations: PLC to PLC network | 64 stations (Control station: 1, Normal stations: 63) |
| Maximum number of connectable stations: Remote I/O network | 65 stations (Remote master station: 1, Remote I/O stations: 64) |
| Overall cable distance | 30 km |
| Maximum station-to-station distance | SI optical cables: 200 m (25 Mbps), 500 m (10 Mbps) H-PCF optical cables: 400 m (25 Mbps), 1 km (10 Mbps) Broad-band H-PCF Optical Cables: 1 km QSI optical cables: 1 km |
| Communication cable | SI optical cables, H-PCF optical cables, Broad-band H-PCF Optical Cables, QSI optical cables |
| Applicable connector | 2-core optical connector plug F06/F08 or equivalent (JIS C5975/5977 compliant) |
| Maximum number of networks | 239 |
| Maximum number of groups | 32 (MELSECNET/10 mode: 9) |
| Network topology | Duplex loop |
| Communication method | Token ring |
| Synchronization method | Frame synchronization method |
| Encoding method | NRZI method |
| Transmission format | HDLC compliant (frame type) |
| Error control system | Retries based on CRC (X 16 + X 12 + X 5 + 1) and timeover |
| Number of occupied I/O points | 32 points (I/O assignment: Intelligent 32 points) |
| Internal current consumption (5 V DC) | 0.55 A |
| External dimensions: Height | 98 mm |
| External dimensions: Width | 27.4 mm |
| External dimensions: Depth | 90 mm |
| Weight | 0.11 kg |
Specifications
| General specifications | Refer to the general specifications of the CPU module. |
Downloads & documentation
Official documents from Mitsubishi Electric (Factory Automation), downloaded directly from the manufacturer.
Data sheets & manuals
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