HAY-ACCESS12/24V8/4A-8W. The HAY-ACCESS12/24V8/4A-8W is a 12/24 VDC 8 Amp selectable switching mode PSU, supplying continuous full rated current to load, with a facility to charge 1 x 18AH or 2 x 7AH capacity standby batteries (not included). There is space for 6 access control modules, such as Paxton or ACT, and comes supplied complete with mounting posts and sticky feet mounts.. 12/24 VDC 8/4 Amp power module. Green mains present LED and output fault yellow LED. Battery backed – 1 x 18AH or 2 x 7AH capacity (Batteries not included). 8 way fire interface fuse board