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Page Title:
Aircraft Armament/Ordnance System to Armament/Ordnance Input Logic |
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|  MIL-D-81347C(AS)
(See 3.5.2.4.4.3.1.) The AOIL shall not enter any error information to the computer during the time
the inhibit is a logical "1"; therefore, any error signal occurring during this time must be stored until
the inhibit becomes a logical "0".
The Type IV error signal shall be a logical "l" for O. 5 micro-
seconds min. The trailing edge of this pulse shall occur during the time the inhibit signal is a logi-
cal "l". The Type V error signal shall be a logical "1" for an indefinite length of time. The Type VI
error signal shall be a logical "1" for a maximum of 640 10% milliseconds, and shall occur during
the time the inhibit signal is a logical "1".
3.5.2.4.3.4.8
Aircraft Armament/Ordnance System to Armament/Ordnance
Input Logic
Signal Characteristics - Signals from the Aircraft Armament
3.5.2.4.3.4.8.1
and Ordnance systems to the AOIL are derived from switch or relay contacts. Up to 15 milliseconds
of "switch bounce" can be anticipated on make and break. Unless otherwise noted, signal levels
are defined as follows:
Logical "0" = open circuit-greater than 100 K.
Logical "1" = DPS ground - less than 10 ohms.
All input signals to the AOIL from the Armament/Ordnance
Systems shall be switch or relay closures relative to DPS signal return (ground). These input sig-
nals shall originate in one of the following interconnection boxes:
Search Store interconnection box
(1)
Forward Armament interconnection box
(2)
Aft Armament interconnection box
(3)
Each of these interconnection boxes shall provide an input con-
nector to the AOIL. The DPS signal return shall not be used in the interconnection box or ARM/ORD
system for any other purpose except to be fed back to the AOIL as a logical "1" via a switch or relay
closure.
The DPS signal return shall not be used for any other purpose
in the interconnection box or sent to any other ARM/ORD system equipments.
Momentary Switches - The only momentary switches with which
3.5.2.4.3.4.8.2
the AOIL must interface are the Pilot's and Co- Pilot's Weapon Release Switches. These two switches
are wired in parallel and only one line shall be sent to the AOIL. When either the Pilot or Co- Pilot
depresses his Weapon Release switch, the Pilot'/Co-Pilot's Weapon Release switch signal line will
go from a logical "O" to a logical "1". The AOIL shall generate an Enter to the computer only upon
depression of either the Pilot' s/Co- Pilot's Weapon Release Switch.
Manually Operated Alternate Action Switches - The AOIL shall
3.5.2.4.3.4.8.3
interface with the following manually operated alternate action switches:
Search Power Switch
(1)
Master Arm Switch
(2)
Kill Store Manual Mode Switch
(3)
(4) Special Weapon Station Select (three signals)
Torpedo Preset Station/Auto Select Switch
(5)
130
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