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Armament Output Logic to Aircraft Armament System |
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|  MIL-D-81347C(AS)
3.5.2.4.4.4.6
Armament Output Logic to Aircraft Armament System
3.5.2.4.4.4.6.1
Signal Characteristics - Unless otherwise noted, all output
drivers shall interface with a circuit in the Aircraft Armament System similar to that shown in Figure
83. In this case a logical "l" shall be 0 + 1.5 -0.0 volts and a logical "0" shall be 12 1 volts.
All output signals from the AOL to the Armament/Ordnance
systems shall be relay drivers capable of driving a diode damped inductive load of not more than 250
ma. The output signals shall originate in the DPS and terminate in one of the following interconnection
boxes:
(1) Search Store Interconnection Box.
(2) Forward Armament Interconnection Box.
(3) Aft Armament Interconnection Box.
Each of these interconnection boxes shall Provide an Output con-
nector to the DPS. The DPS Armament/Ordnance Test Panel shall provide the positive voltage-to
operate the isolation relays in the three interconnection boxes. This voltage shall be used only for the
relays to which the DPS interfaces. The relays shall be activated when the two series drivers in the
DPS are turned on to provide a return path for the DPS positive power supply through the isolation
relay in the interconnection box, to the DPS ground. By this means the DPS can remain isolated from
the ARM/ORD ground and aircraft 28 VDC transient conditions.
Weapon Select and Launch Commands - The AOL shall, upon
3.5.2.4.4.4.6.2
computer command, select and launch a weapon from one of 1 8 weapon stations. The selection and
launch are accomplished simultaneously by selecting one of 18 lines. The output signal (logical "1")
for a normal launch command (i.e. , Rockets Single or Ripple have not previously been selected) shall
be 130 milliseconds 10% in duration. If Rockets Single or Rockets Ripple have previously been sel-
ected, the launch command (in this case Rocket Launch) shall be 640 milliseconds 10% in duration.
3.5.2.4.4.4.6.3
Armament Auxiliary Functions
Arm Commands - Arm commands shall be transmitted via four
3.5.2.4.4.4.6.3.1
signals from the AOL to the Aircraft Armament System. These signals, Arm Nose (Bomb Bay), Arm
Tail (Bomb Bay), Arm Nose (Wing) and Arm Tail (Wing), shall be a logical "l" as long as the specified
function is to be active. Two signals arm the wing stations (nose and tail) and the other two signals
arm the bomb bay stations (nose and tail).
Rocket/Mines/Torpedoes Commands - Three commands will be
3.5.2.4.4.4.6.3.2
transmitted via three signals from the AOL to the Aircraft Armament System. These are the Wing
Hook Release Transfer, Rocket Single/Rocket Ripple Select command. If Mines or Torpedoes, which
are connected to the Aircraft Weapon Station Hook, are to be released, a Wing Hook Release Trans-
fer signal is required (logical "1" level), as well as a Release/Station Select and Release signal. If
a Rocket Pod is mounted on the Hook, the Wing Hook Release Transfer signal must be logical "O".
To release a Single Rocket, a logical "1" is required on the Rocket Single Select line. To activate
the Rocket Ripple function requires a logical "1" on the Rocket Ripple Select Line.
3.5.2.4.4.4.6.4
Armament Output Logic to Armament System (Kill Stores) Sognals
(Summary) - "Output Signals" from the DPS to the armament kill stores and controls are listed below.
Each relay driver-in the DPS must be able to furnish a ground for a 250 milliampere 12 volt load.
(1) Station select and Release (Fire) -18 relays (one for each
station). Each line furnishes a ground for one of 18 relays. Function use d for both dropping stores
and firing rockets. Must follow items (2), (4), (5), (6), (7), (8) and (13) by at least 130 milliseconds
10%. Must follow item (12) by at least 3 seconds. (Note 3 seconds is a program function. )
143
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