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PRODUCT MANUAL EPX-C380
21
BATTERY BACKUP
An optional external battery, connected at
J4
, supplies the EPX-C380 board with standby power for the real-time clock,
CMOS setup RAM and SRAM (applicable models only). An extended temperature lithium battery is available from
WinSystems, part number BAT-LTC-E-36-16-2 or BAT-LTC-E-36-27-2.
A power supervisory circuit contains the voltage sensing circuit and an internal power switch to route the battery
or standby voltage to the circuits selected for backup. The battery automatically switches ON when the VCC of the
systems drops below the battery voltage and back OFF again when VCC returns to normal.
WARNING:
BAT-LTC-E-36-16-2
or BAT-LTC-E-36-27-2
must be connected at J4.
Improper installation of the battery could result in explosive failure. Please be careful
to note correct connection at location J4.
(For external battery. Provides battery backup to RTC and BIOS CMOS.)
J4 - External Battery
Visual
Index
PCB Connector:
MOLEX 501953-0307 (J4)
Mating Connector:
MOLEX 501939-0300 (Housing)
MOLEX 501334-0100 or 501334-0000 (Crimp)
J4
□ □ □
1 2 3
GND
VBA
T
NC
Preliminary