You can connect it and the AMS will use the same 6pin just like what comes off of your HUB or Buffer on the X1.
So you are saying I can use the buffer from a X1 which has a 6 pin input and a 4 pin output?
No the H2D has the buffers built-in to the printer directly. I’m saying your AMS is currently using the 6pin bus cable that connects from the buffer/hub on the X1 to the AMS; which the buffer/hub then connects to the printer via the 4pin cable.
The AMS, AMS HT, and AMS 2 Pro will all work directly on the H2D via their 6pin bus cables in series; without anything else other than external power for the AMS HT and for the AMS 2 Pro the external power is optional with the limitation that you can only use the drying function on one at a time with bus power.
Your current X1 is like this:
X1 Printer → 4Pin bus cable → Hub/Buffer → 6pin bus cable → AMS → 6pin bus cable → 2nd AMS → 6pin bus cable → 3rd AMS → 6pin bus cable → 4th AMS
Connecting it to the H2D will be like this:
H2D → 6pin bus cable → AMS → 6pin bus cable → 2nd AMS → 6pin bus cable → 3rd AMS → 6pin bus cable → 4th AMS → 6pin bus cable → AMS HT → 6pin bus cable → 2nd AMS HT → 6pin bus cable → 3rd AMS HT → 6pin bus cable → 4th AMS HT → 6pin bus cable → 5th AMS HT… etc up to 4 AMS/AMS 2 Pro + 8 AMS HT.
In your specific circumstance it seems you have the H2D with 1x AMS and 1x AMS 2 Pro. So you’d connect them like this
Connect from the H2D 6pin bus connection with a 6pin bus cable → connect the 6pin bus cable to one of the 6pin bus connections on the AMS 2 Pro → connect a 2nd 6pin bus cable to the 2nd 6pin bus connection on the AMS 2 Pro → connect the 2nd 6pin bus cable to the 6pin connection on your AMS.
All you’re saying is right but I’m afraid it will confuse # airsyspro
I have the same set-up, 1 H2D, 1 AMS2 PRO, 1 regular AMS.
AMS2 PRO is connected to the H2D via a 6-pin cable, The regular AMS is connected to the AMS2 Pro via a 6-pin cable, that’s it.
6-pin cable sold with AMS2 Pro or AMS are the same, just the length is different so you can play with those 2 cables as required depending on where you place each AMS. I put the AMS PRO on top of H2D so I used the shorter AMS cable to connect them and used the longer AMS2 Pro cable to connect the original AMS (placed on the side) of the printer to the AMS 2 PRO.
I don’t even use the optional power adapter. I can dry the filaments in AMS2 PRO while printing using the original AMS, no issue.
Crystal clear 
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Hi,
You listed that in great detail.
Could you do that again for the filament path (including adapters, etc.)?
I think the information on how to connect multiple AMS/AMS 2/AMS HT to the H2D or X1/P1 is very confusing.
A graphic overview of all connection scenarios (electrical and filament path) would be a real help.
Greetings
Robert
…at the same time… You can connect them but only one at a time can dry.
Sorry, I’m not making 144+ pictures 
good luck
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Watch this clip:
The whole video is very informative so I recommend you watch the whole thing too.
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The whole 8 second video which goes by really quickly. Not sure I can call it very informative, thought maybe if I pause a lot I can glean the setup.
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So is the bottom line that you just use the 4:1 adapters as joiners in any case where you have multiple inputs and then let the buffer on the H2D figure it out? So if I wanted 2 AMS and 2 HT to a single nozzle, I would just use a 4:1 adapter which each AMS/HT outputting to one of the ports. If I wanted the max setup of 2 AMS and 4 HT to a single nozzle I would use TWO 4:1 adapters, to step down from 6 to 4 to 1?
I feel like as my collection of Bambu printers keeps expanding, and my AMS’s keep expanding, someone needs to make a switcheroo that let’s me have them all hooked up to all my printers and I can just switch which one they are going to 
do you have an external power supply for the second ams ?
Yes, though that’s only needed when you want to dry using the second AMS whilst also doing a print.
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Ah yes indeed, forgot that part 
Thats if you want to use all of this over one nozzle and the other nozzle with an external spool. Ergo: maximum setup. If using like I do (mixed over two nozzles) its a little bit different with the ptfe tubes.
Yeah, but it shows the basics of what you need to know. Besides that, its just which ams you want going to which nozzle, or how many. More than 1? need a coupler.
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I have
2 AMS 2 Pros and 1 AMS HT.
Is the wiring like this? (I bought dedicated power adapters for the second AMS2.)
I uploaded the marking diagram and nozzle compatibility information.
Any questions or suggestions?
(The first two pictures are my own markings.
The latter pictures are from the official Wikipedia.)
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