REV 2.3
© 2012 TCW Technologies, LLC.
5
Ground Based Recharging:
To accomplish ground based charging, connect an approved battery charger or power
source to the main aircraft battery and energize the main aircraft power bus by turning
on the master switch, leave all other aircraft loads in their off state. Note, the ground
base source of power must be able to supply the load current of all devices that can not
be turned off in this nominal state, plus the 1.8 amps of IBBS recharge current. Leave
the ground based charging system connected and powered until the IBBS system
completes its recharge cycle of its internal battery, for a fully discharged battery this
may take up to two hours.
Alternately, a ground based charger is available from TCW Technologies LLC, model #
IBBS-12v-CHARGER. This charger may be used for recharging the IBBS unit as well
as keeping it topped off during long term product storage. (3 months or longer)
Battery Capacity:
The IBBS, model IBBS-12v-2ah provides an energy capacity of 2.0 amp-hours at 12
volts when the system is fully charged and operated at 25 C°. Depending on various
conditions including operating and storage temperature and age of the battery pack, the
capacity of the system will vary. With a fully charged battery, the following average
performance can be expected in terms of operating duration. The operating duration is
for output voltage down to 9.5 volts.
Nominal Current Draw
Duration
total connected load
1.5 amps
60 minutes
1.0 amps
100 minutes
0.75 amps
160 minutes
The Ni-mh battery in the IBBS system is replaceable, however, the IBBS product must
be returned to TCW Technologies, LLC. for this service. Battery life depends strongly
on many factors including operating and storage temperature, number of discharge
cycles and depth of discharge. The battery capacity should be checked at least
annually for suitable back-up power operation of the connected equipment. When the
battery capacity no longer meets the operating criteria of the aircraft it must be replaced.
Contact TCW Technologies, LLC. for battery replacement.
Storage beyond 3 months:
If the IBBS unit is to be stored without connection to the aircraft for a period greater than
3 months it must be connected to a source of DC power to maintain the battery’s
charge. Only connections to the ground terminal and the trickle charge terminal are
required. Connect Pin 2 (trickle charge) and Pin 3 (ground) of the IBBS to any source
of regulated DC power at 12-15 volts with a current capability of 0.1 amps to accomplish
trickle charging. The trickle charge connection may be left connected during the
entire storage period. Charger model IBBS-12v-CHARGER is available from TCW
