2
DESCRIPTION
The SEI 1800/48-2U-P-ACC DC-UPS is a compact unit designed to power a wide range of
customer equipment requiring battery-backed 48 VDC power. The unit comes equipped
with 1800 Watts of rectifier power. The power distribution is provided on the rear of the unit
via fused 10/32 studs suitable for a two-hole compression lug. Commercial power is
applied to the left side of the rear unit via a hard-wired unterminated 3 conductor cable.
The Alarm Contact Closures are accessed via an RJ-45 jack on the left side of the rear of the
unit. The SEI DC-UPS can be mounted on a 19-inch rack and occupies 2U (3.5 inches) of
rack space.
The SEI 1800/48-2U-P-ACC comes equipped with two field replaceable, non-spillable
sealed lead acid battery packs. Both battery packs must be installed to provide back-up
power. Circuitry within the DC UPS monitors and periodically tests the condition of the
batteries and displays the results via front panel LEDs as well as via the Alarm Contact
Closures. The DC UPS also utilizes a Low Voltage Disconnect, (LVD), circuit that
prevents damage to the Battery Packs during an extended AC outage.
