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Operating Sequence
No.
Operation
Description
LED Status
Signals Status
Troubleshooting
4
Connect load2 to
DRU module for
Buffered load.
(Normal operation
mode)
Connect the load cable to “DC OUT”
terminal of DRU module (+ to + and - to -).
Green flashing slowly
(battery charging)
Ready: Open
Buffering: Open
Replace BAT: Open
Battery capacity < 85%
Green On
(battery fully charged)
Ready: Close
Buffering: Open
Replace BAT: Open
Battery capacity
≥ 85%
Connect load1 to
DC UPS module
for Unbuffered
load.
(if required)
Connect the load cable to “DC IN”
terminal of DRU module (+ to + and - to -).
See above
5
Buffering mode
(Battery operation)
Input collapse, DRU module operate in
buffering mode. Battery will supply to
load.
Green flashing quickly
(battery discharging)
Ready: Open
Buffering: Close
Replace BAT: Open
-
OFF
(DRU module does not
operate in buffering
mode)
Ready: Open
Buffering: Open
Replace BAT: Open
• Re-check battery
wiring and compare
with “Typical
Application Notes” in
DRU module
datasheet. Make
corrections as needed.
• Re-check battery
voltage and compare
with battery voltage
range. Replace with
new battery (21-27.6
Vdc) as needed.
10
