OVERVIEW

Official designation: Mitsubishi QJ72BR15 (MELSEC-Q Series, MELSECNET/H Network Module)

Role/Application: A local station module for the MELSECNET/H coaxial bus system, providing a 10 Mbps data transmission speed for reliable remote I/O communication and distributed control within the MELSEC-Q platform.

KEY SPECS SUMMARY

Power: 5 V DC, 1.10 A internal current

Interfaces / Ports: F-type coaxial connector plug

Indicators: Refer to the latest manufacturer manual.

Operating Temp: 0 to 55 degrees C

Platform / Compatibility: MELSEC-Q Universal Base Unit

Limit: 33 total stations, 8192 remote I/O points

Lifecycle: End of Life announced, last time buy January 2029

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the compatible coaxial cables and maximum distance for the QJ72BR15?

A: Compatible cables are 3C-2V or 5C-2V/5C-FB, with a max overall distance of 500 meters for 5C-2V/5C-FB.

Wiring & Installation:

Q: Does the coaxial bus system require terminal resistance and what is the value?

A: Yes, a 75 Ohm terminal resistor (A6RCON-R75) is required at both terminal stations of the network.

Troubleshooting & Compatibility:

Q: What are the dimensions and weight of the QJ72BR15 module?

A: The unit dimensions are 27.4 mm wide, 98 mm high, 90 mm deep, weighing 0.16 kg.

Replacement & Upgrades:

Q: Are there designated repeater units to extend the overall network distance for QJ72BR15?

A: Repeater units like the A6BR10 (AC) or A6BR10-DC (DC) can extend the coaxial bus up to 2.5 kilometers.