REV 1.6
© 2019 TCW Technologies, LLC.
4
Output Power connections
:
The IBBS-12v-6ah has four output pins, Pins 12,13,14,15. These pins provide power to the
connected load. These four wires may be paralleled together for redundancy and load
current sharing. Use 20 awg wire for each pin. Maximum output current of 3.5 amps per
pin, and 8 amps maximum continuous combined for all four pins. The output wires of the
IBBS system are protected with a single 10 amp, mini ATC fuse. This fuse is accessible on
the side of the enclosure.
IMPORTANT NOTE ON CHANGING FUSE:
Disconnect the main product connector before changing the fuse!
Replace fuse with 10 amp, mini ATC fuse only
5.
The Back-up Power Master switch must be utilized to turn the back-up battery system
off when not in use, except for installations where the off state current requirement is less
than 50 micro-amps, such as with the AFS EFIS systems. Follow the specific wiring
diagram for this application. This back-up power master switch gives the pilot the ability to
turn the back-up battery system off. In some installations this may be the only means to
shut down the connected equipment.
6.
The IBBS unit has a low voltage warning output, pin 3. This pin may be used to drive
an LED indicator or to provide a digital signal to indicate the main input bus is in a low
voltage condition. When the main input bus (connected to pin 5) falls below about 11 volts
this output will drive to a low state. Maximum current sourced on this pin is 25 milliamps.
7.
The IBBS unit has in internal battery monitor connection, pin 2. This pin allows the
voltage state of the internal battery to be monitored with a separate voltage meter or analog
input. This pin will only report internal battery voltage when the unit is enabled by turning
the Back-up Master switch ON. A fully charged battery back will indicate about 13-14.7 volts
on this pin.
Important note: the meter utilized to measure pin 2 must have an input
impedance >100k ohms otherwise it will load down pin 2 and provide an artificially
low voltage.
8.
Complete the installation of the wiring harness and connector prior to attaching the
connector to the IBBS product. This is essential to ensure the wires do not inadvertently
short together during installation. Remember, the IBBS pack is a back-up source of power
and is ready to deliver output power even when the aircraft electrical system is in the off
state.
9.
When using the IBBS product to provide back-up power to an electronic ignition
system it MUST be used to back-up one and only one electronic ignition module. Do not
use one IBBS to back up both electronic ignition modules in a dual electronic ignition
system. Follow the wiring diagram for installation with electronic ignition module. Note, the
Light Speed Electronic ignition system connects directly to aircraft battery as shown. Other
brands of electronic ignition systems connect to the switch side of the aircraft master bus.
Follow the instructions per the electronic ignition manufacture for your installation.
