p/n 725.0002 REV 3.0
© 2023 TCW Technologies, LLC.
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5.
The Back-up Power Master switch must be utilized to turn the back-up battery
system off when not in use. The 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 into 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 volt meter or an
analog input of a monitor system. 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
reading.
When used with the following EFIS systems wire pin 2 to the Volts2 input of the
EFIS or engine monitor as follows:
8.
Complete the installation of the wiring harness and connector prior to attaching
the connector to the IBBS product. It 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 instructions per the electronic ignition manufacture. Do not connect
any other loads to the IBBS when using the IBBS to power an electronic ignition module.
Do not use the IBBS system to back-up a dual ignition system having only a single power
input that feeds both ignition system. Do not use a single IBBS system to back-up two
electronic ignition systems.
Manufacturer/model
Volts 2 input location
Garmin G3x system GEA 24
J244, Pin 28
Advanced Flight Systems 5000 series:
Expansion Port Pin 13
