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A1SJ71QLP21

The A1SJ71QLP21 is a Q-mode MELSECNET/H PLC communication module for Mitsubishi's A Series PLCs, designed for high-speed data communication between programmable controllers. This module enables 10Mbps optical loop network connectivity for reliable industrial automation systems.

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Key Specifications
Parameter Specification
Model A1SJ71QLP21
Series A1SJ71Q (MELSECNET/H)
Network Type MELSECNET/H (Q-mode)
Transmission Speed 10Mbps
Communication Media Optical fiber (H-PCF)
Max. Stations 64 stations
Distance Between Stations 500m (max)
Current Consumption 0.8A (5V DC)
3. Performance Features
✔ High-Speed Communication:

10Mbps data transmission

2ms network refresh time (for 1k-word data)

Dual redundant loops for reliability

✔ Network Functions:

Automatic reconnection after cable failure

Network diagnostics via GX Developer

Remote device monitoring

✔ Data Handling:

8k-word link data capacity

1k-word transient transmission

4. Physical Specifications
Parameter Value
Dimensions 55 × 98 × 90 mm
Weight 0.3 kg
Connector Optical connector (H-PCF)
LED Indicators RUN, ERR, SD, RD, etc.
5. Environmental Ratings
Operating Temp.: 0°C to +55°C |

Storage Temp.: -25°C to +75°C |

Humidity: 5-95% RH |

Vibration: 4.9 m/s² |