The retrograde sequence control 2 circuit breaker CB4-28 connects the retrograde squib bus quantity 2 redundantly to the same switches to which the retrograde sequence management 1 circuit breaker connects power and free online slots arms the same circuits. The boost-insert control 1 circuit breaker CB3-1 provides BIA squib bus number 1 energy to initiate the abort sequence with the abort control handle, jettison the nostril fairing and scanner cowl, separate the spacecraft from the launch vehicle, sense launch vehicle/spacecraft separation, extend the uhf and diplexer whip antennas, and provoke several experiments.
The sequence lights energy circuit breaker CB6-1 applies foremost bus energy to the sequence mild Bright-DIM switch and to open contacts on the barostat switch arm relay and the message acceptance pulse relay. The electronic timer circuit breaker CB8-15 applies principal bus energy by contact A of elevate-off relay K3-11 to begin the digital timer when the carry-off sign energizes the K3-11. The abort change energizes the retrograde abort relay K3-36 which arms K4-23, the OAMS lines guillotine latch relay; K4-30, the retrograde abort pyrotechnic switch relay; and K4-74, the wire guillotine relay.
When K11-25 is energized, it energizes K4-23, K4-30, and K4-74.
Pressing the change-indicator energizes the wire guillotine relay. K4-2, contact C energizes the separate electrical latch relay K4-64, the adapter shaped charge relay K4-three and Slots free the abort discrete relay K4-66. Three wire guillotines igniters have to be fired: the launch automobile/spacecraft wire guillotine igniter C, free online slots the facility wire guillotine igniter D, and gear adapter wire guillotine Igniter E.
When K4-25 and K4-26 energize, they apply energy by way of the A contacts of K3-71 to wire guillotine relay K4-2. In operation, the abort change applies BIA squib bus energy to the Attitude Control System abort relay K3-59. The attitude indicate control retrograde circuit breaker CB12-7 applies retrograde widespread management bus energy to the IND RETRO ATT swap-indicator and to contacts of retrograde bias off relays K4-62 and K4-63. The squib batteries provide dc energy to the widespread management bus and the two Orbital Attitude Maneuvering System (OAMS) squib buses.
Through these buses it arms the RETRO JETT ARM-Safe swap, the RETRO ROCKET SQUIBS ARM-Safe 1, 2, Free slots no download 3, and 4 switches, the ATT IND CNTL RETRO, RETRO SEQ. Within the ARM place, free slots this change arms the BIA squib buses I and Free slots 2 and the BIA widespread control bus. The four retrograde rocket squib arm switches apply the voltages which ignite the 4 retrofire rockets to open contacts of the retro rocket automatic and guide fire relays.
The D contacts of K4-23 apply power to the OAMS propellant strains guillotine igniter.