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A MELSEC-Q Series MELSECNET/H Unit (QJ71LP21-25)
For the versatile MELSEC-Q series, a MELSECNET/H unit
Part Number
Configured Part Number is shown.
QJ71LP21-25
MELSECNET/H Network Unit Features
The MELSECNET/H network unit lets you build a large-scale, flexible network system.
A MELSECNET/H network system may be a PC-PC network for communication between an administration station and a normal station, or a remote I/O network for communication between a remote master station and a remote I/O station.
Optical loop system: High-speed communication at 10 Mbps / 25 Mbps is achieved. To support a long distance between stations / long total distance, the noise resistance is high.
Coaxial bus system: A system can be built with lower cost than what an optical loop system needs because inexpensive coaxial cables are used.
Twist bus system: A low-cost network system can be built by combining affordably-priced network units and twisted paired cables.
MELSECNET/H Network Unit Specifications
| Item | Specifications | |||||||
|---|---|---|---|---|---|---|---|---|
| Network System | Optical Loop System | Coaxial Bus System | Twist Bus System | |||||
| Type Name | QJ71LP21(S)-25 QJ72LP25-25 | QJ71LP21G QJ72LP25G | QJ71BR11 QJ72BR15 | QJ71NT11B | ||||
| Connection Cable | Optical Fiber Cable (SI) | Optical Fiber Cable (GI) | Coaxial Cable (3C-2V) | Coaxial Cable (5C-2V) | Twisted Paired Cable | CC-Link Dedicated Ver. 1.10 Supported Cable | ||
| Network Between PCs | Maximum Link Points Per Network | LB | 16,384 points (8,192 points in MELSECNET / 10 mode) | 16,384 points | ||||
| LW | 16,384 points (8,192 points in MELSECNET / 10 mode) | 16,384 points | ||||||
| LX/LY | 8,192 points | |||||||
| Maximum Link Points Per Station | · MELSECNET/H mode, MELSECNET/10 mode (excluding twisted bus system) {(LY + LB) / 8 + (2 × LW)} ≤ 2,000 bytes · MELSECNET/H Expansion Mode {(LY + LB) / 8 + (2 × LW)} ≤ 35,840 bytes | |||||||
| Number of Connected Stations Per Network | 64 stations (Administration stations: 1, Normal stations: 63) | 32 stations (Administration stations: 1, Normal stations: 31) | ||||||
| Remote I/O Network | Maximum Link Points Per Network | LB | 16,384 points (Remote master station > Remote sub-master station or remote I/O station: 8,192 points, Remote sub-master station or remote I/O station > Remote master station: 8,192 points) | - | ||||
| LW | 16,384 points (Remote master station > Remote sub-master station or remote I/O station: 8,192 points, Remote sub-master station or remote I/O station > Remote master station: 8,192 points) | |||||||
| LX/LY | 8,192 points | |||||||
| Maximum Link Points Per Station | · Remote master station > Remote I/O station ((LY + LB) / 8 + (2 × LW)) ≤ 1,600 bytes · Remote I/O station > Remote master station ([LX + LB] / 8 + [2 × LW]) ≤ 1,600 bytes · Multiplex remote master station from/to Multiplex remote sub-master station ([LY + LB] / 8 + [2 × LW]) ≤ 2,000 bytes | |||||||
| Maximum Input/Output Points Per Remote I/O Station | X + Y ≤ 4,096 points If there is an identical number on X side and Y side, it is counted as a point only on one side. | |||||||
| Number of Device Points Per Remote I/O Station | M | 8,192 points | ||||||
| SM | 2,048 points | |||||||
| D | 12,288 points | |||||||
| SD | 2,048 points | |||||||
| Number of Connected Stations Per Network | 65 stations (Remote master stations: 1, Remote I/O stations: 64) | 33 stations (Remote master stations: 1, Remote I/O stations: 32) | ||||||
| Communication Speed | 25 Mbps / 10 Mbps | 10 Mbps | 156 Kbps / 312 kbps / 625 kbps / 1.25 Mbps / 2.5 Mbps / 5 Mbps / 10 Mbps | |||||
| Total Extension Distance | 30 km | 300 m | 500 m | 1,200 m / 156 kbps, 600 m / 312 kbps, 400 m / 625 kbps, 200 m / 1.25 Mbps | 1,200 m / 156 kbps, 900 m / 312 kbps, 600 m / 625 kbps, 400 m / 1.25 Mbps, 200 m / 2.5 Mbps, 150 m / 5 Mbps, 100 m / 10 Mbps | |||
| Distance Between Stations | Maximum 1 km | 2 km | - | - | ||||
| Part Number |
|---|
| QJ71LP21-25 |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | Type of unit | Applicable stations | With/without external power provision |
|---|---|---|---|---|---|---|---|
SGD 1,186.40 | 1 Piece(s) | 20 Day(s) | Optic Loop Unit (SI/QSI Cable) | Administration Station/ Normal Station/ Remote Master Station | NA |
Loading...
Please check the type/dimensions/specifications of the part QJ71LP21-25 in the A MELSEC-Q Series MELSECNET/H Unit series.
Specification/Dimensions
-
Type of unit
- Coaxial Bus Unit
- Optic Loop Unit (GI Cable)
- Optic Loop Unit (SI/QSI Cable)
- Twist Bus Unit
-
Applicable stations
- Administration Station/ Normal Station/ Remote Master Station
- Management Station/Normal Station
- Remote I/O station
-
With/without external power provision
- Available
- NA
Days to Ship
-
- All
- 20 Day(s) or Less
- 91 Day(s) or Less
Specify Alterations
- The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .
Similar Part Numbers
| Part Number |
|---|
| QJ71BR11 |
| QJ71LP21G |
| QJ71LP21S-25 |
| QJ71NT11B |
| QJ72BR15 |
| QJ72LP25-25 |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | Type of unit | Applicable stations | With/without external power provision |
|---|---|---|---|---|---|---|---|
SGD 1,186.40 | 1 Piece(s) | 91 Day(s) | Coaxial Bus Unit | Administration Station/ Normal Station/ Remote Master Station | NA | ||
SGD 1,737.80 | 1 Piece(s) | Quote | Optic Loop Unit (GI Cable) | Administration Station/ Normal Station/ Remote Master Station | NA | ||
SGD 1,737.80 | 1 Piece(s) | Quote | Optic Loop Unit (SI/QSI Cable) | Administration Station/ Normal Station/ Remote Master Station | Available | ||
SGD 790.40 | 1 Piece(s) | Quote | Twist Bus Unit | Management Station/Normal Station | NA | ||
SGD 1,422.00 | 1 Piece(s) | Quote | Coaxial Bus Unit | Remote I/O station | NA | ||
SGD 1,580.90 | 1 Piece(s) | Quote | Optic Loop Unit (SI/QSI Cable) | Remote I/O station | NA |
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