The EYI 103 novaCom
supply and UPS card is part of the EY3600 family of systems. The EYI103
is a
function card for the EYU108 and EYU109 racks. Apart from providing all
the
power supplies, it charges up the back-up accumulator and effects the
uninterrupted change-over to battery mode in the event of a sharp
voltage drop
or a power failure. Similar to a multiplexer/demultiplexer, it also
manages the
addressing of the EYI288 AS memory cards.