How many D405 sensors can be connected to a single PC?

• MartyG

  • April 26, 2024 07:02

  Hi Iwai Daisuke  If all of the D405 will be active simultaneously then the number of cameras that you can connect to a single PC will depend on the hardware specification of that PC.  Each individual camera will consume some of the computer's resources.  As a rough guide, a PC with an Intel Core I5 processor or equivalent should be able to support 3 cameras simultaneously, whilst an i7 or i9 computer should be able to support 4 to 6 cameras.  

   

  Another consideration will be USB data bandwidth.  Assuming that the cameras will be connected to a USB hub, each hub will support a finite amount of bandwidth.  This is commonly 5 gigabits per second (Gbps), though there are hub products that support 10 gbps. 

   

  The more streams that you have enabled simultaneously and the higher the resolution and FPS, the more of the hub's bandwidth allowance that will be consumed.  So you must ensure that the total bandwidth consumption by all attached cameras is less than the hub's total allowance.  If you have ore than 4 cameras then a way to do this is to link more than one hub together and spread the cameras across the hubs instead of having all of them on one hub.

   

  The most cameras that I have seen attached to a single PC is 20, though of course they were not all enabled simultaneously.

   

  The chart below shows bandwidth consumption tests that Intel performed in 2018 with 4 RealSense cameras attached to the same mains electricity powered hub, with theoretical projections for 6 cameras.

   

  

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• MartyG

  • April 26, 2024 07:03

  The values in the above chart are in megabits per second (mbps).  So 5 Gbps = 5000 mbps and 10 Gbps = 10000 mbps.

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