SIB is front-end weapon management computer based on open architecture concept, to function in Safety Critical Environment with high degree of reliability.
It is part of weapon control system of the LCA and controls Pylon Interface Boxes (PIBs). It directly manages the Gun and Chaff & Flare systems of the LCA.
It comprises of VME based dual redundant hardware.
It receives high level commands from Open Architecture Computer (OAC) on the avionics bus and controls the safe release of stores.
SIB is packaged in a ½ Air Transport Rack (ATR) size enclosure.