REV 2.3
© 2012 TCW Technologies, LLC.
2
Installation Instructions:
1. IMPORTANT NOTE:
Consult the attached wiring diagrams to identify wiring connections for your
particular installation. The IBBS system may be fed from a bus that remains active
during engine starting, such as the master bus or it may be fed from an avionics
bus that is switched off during engine starting. If you want your avionics to be up
and running during engine cranking, ensure input power is derived from the master
bus.
2. The IBBS-12v-2ah was designed to drive one piece of equipment, such as an EFIS,
Autopilot or an electronics ignition module. The output current limit for this model is
3 amps maximum continuous current. If more load current is required use model
IBBS-12v-4ah. Consult the install manual for detailed specifications.
3. Mount the IBBS in a suitable location in the aircraft. Ensure the mounting points and
fasteners are suitable for the weight of the product, consult the specifications for
details. The IBBS must be mounted inside the aircraft, do not mount the IBBS in the
firewall forward area. Avoid mounting the IBBS unit up under the instrument panel
where significant heat may be trapped. Select an area that is accessible to allow for
future battery servicing. The operating temperature range of the system is -10 C° to
60 C° and the effective charging temperature range is 0 C° to 40 C°. Select an
installation location that will comply with these requirements.
4. Connect the aircraft wiring according to one of the wiring diagrams shown.
The IBBS must be powered through a properly sized circuit breaker or fuse.
ENSURE the proper size wire is utilized for the input feed, output supply and ground
connection. The IBBS has two power inputs, pin1 provides main recharge current
and main bus sensing, pin 6 provides pass through power from the main bus to the
connected load during normal operation. Connect the two input wires together at the
fuse or circuit breaker as shown in the diagrams. The IBBS-12v-2ah has three
output pins, pin 7,8,9, that provide power to the connected load. These three wires
may be paralleled together for added redundancy. The output wires of the IBBS
system are internally protected with a single 8 amp, 5 x 20 mm fuse. No additional
external fusing is required; however, use at least 20 awg wire for the output wires.
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 utilizing ASF EFIS systems and
following the specific wiring diagram for this application. This 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. 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
