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This board allows for the connection of up to 4 Duet 3 Toolboards to the Duet 3 Mainboard at one time, greatly simplifying the CAN-FD bus and power wiring. 

The documentation contains more details. See below for a summary of the feature set:

• 2- way barrier strip for power in.
• Four 2-way JST VH connectors for power out to tool boards, individually fused 5A
• Two RJ11 connectors for CAN bus in/out to connect to Duet 3 main board and expansion boards.
• Four 4-pin JST ZH connectors to connect CAN bus to four Tool Boards.
• Four pairs of 2-pin headers for fitting with jumpers to bypass unused tool board CAN connectors (6 jumpers shown fitted in the picture).
• CAN bus termination 2-pin header, for fitting with a jumper if the CAN_OUT RJ11 port is not used (shown fitted in the picture)

Documentation

For more information see Duet3D documentation.

What's in the box:

• Duet 3 Tool Distribution Board
• 4 of 4-way JST ZH tails 150mm with fitted plug (CAN to tool boards)
• 4 of 2-way JST VH housing & crimps (Power to tool boards)
• 2 Fork connectors (Power in)
• 9 loose 2-pin jumpers, for fitting to the CAN bypass 2-pin headers and CAN bus termination 2-pin header as required.
• 4x M3 nylon washers for mounting holes
• A loose 500mm RJ11 cable is also supplied for connecting the CAN_IN port to the Main Board, Expansion Board, or other tool distribution board.

Buy a Duet 3 Tool Distribution Board from Spool3D for your 3D printer in Canada without the surprise cost of the exchange rate!