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Top view of the Mitsubishi HR551B PCB showing the component and connector layout
  • Top view of the Mitsubishi HR551B PCB showing the component and connector layout
  • Mitsubishi HR551B bus extension card with black and white multipin connectors
  • Low-angle view of the HR551B board showing the black multipin socket and exposed pin header
  • Rear view of the HR551 board showing the Made in Japan marking beside the white connector
Mitsubishi HR551 Bus Extension Card – HR551B, BN634A910G51
In stock

• Testing Video Provided
$578.00 USD
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Delivery: Estimated 2- 6 business days delivery. See details

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All parts are covered by REACO CNC warranty

All parts are covered by REACO CNC warranty
Every part is carefully inspected and tested for reliability。

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More than 150,000 parts in stock & ready for delivery

More than 100,000 parts in stock & ready for delivery

The Mitsubishi HR551 is the bus extension card used in the FCU6-EP105-1 front IC card interface for the EZMotion-NC E68. The board shown is marked HR551B and BN634A910G51 on the reverse side.

Product Specifications

Brand Mitsubishi Electric
Model HR551
Board Version Shown HR551B
PCB Marking BN634A910G51
Product Type CNC bus extension card
Documented Application EZMotion-NC E68 with the FCU6-EP105-1 front IC card interface
Origin Marking Made in Japan

Product Scope and Fitment

This listing is for the HR551B bus extension PCB shown. Mitsubishi lists the HR253 front IC card board and F161 bus cable as separate components of the FCU6-EP105-1 assembly.

To confirm fitment, send us your CNC control unit model and photos of both sides of the original board. A clear photo of the HR551B and BN634A910G51 markings helps us verify the board version and connector layout before you order.

Testing, Shipping, and Warranty

We provide a test video before dispatch and free technical support. Each board is shipped in protective anti-static packaging.

Confirmed in-stock orders typically ship within 1–2 business days. We ship worldwide via DHL, UPS, or FedEx and provide an estimated delivery time with your quote.

New and refurbished units carry a 12-month warranty. Used units carry a 3-month warranty.

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