User's Manual

V-1
Section V – Power Supply
Switching AC-DC power supplies are used to power the amplifier pallets, the control circuits, and all of
the fans. There is (1) power supply used to generate the necessary current for the amplifier pallets, set
to 31.0 Vdc nominally.
The power supply is a Mean Well S-240-30. This switching power supply is fully protected against short
circuit and output overload. Short circuit protection is a cycling type power limit. The internal AC fuse is
designed to blow only on a catastrophic failure in the unit – the fuse does not blow on overload or short
circuit. The thermal shutdown automatically recovers when the power supply chassis cools down.
AC is fed into the enclosure via a filtered EMI AC entry. It is then current limited with a resettable circuit
breaker before passing through a rocker switch. This switch turns the AC on and off to the switching
power supply.