Smartlink power supply with Smartpack wall mount dimmers

Hi,

When I use 3ea of Smartlink 5 button stations with Smartpack wall mount dimmers( 2ea of SL1210W, 1ea of SL620W),

do I need only one Linkpower Supply(like SL1210W-LPS) for the system?

or do I need linkpower supply for all three each dimmers?

There will be smartfade console, too.

I'd appreciate for any advice regarding.

thank you!

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