according to the manual, it´s 12 VAC, 1.5A !!!
I use 2 A16U and one of the PSUs is exactly this,- the other is a (norway) MASCOT PSU 12 VAC, 1.6A.
Both work like a charme w/ Z-Link and a 3-card PCI system as well as XITE-1 (w/ a blackface one)
Bud
according to the manual, it´s 12 VAC, 1.5A !!!