1、MIL-C-45956 LO 9999906 0309602 O W 23 July 1974 SUPERSEDING (See Section 6) MILITARY SPECIFICATION CONTROLLER, WEAPONS-GUN SPEED AND LAUNCHER BRAKE, LH This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification covers one type
2、 of weapons controller for installation in the left hand position of the M28Al Armament Subsystem. The left weapons controller contains the required circuity to control firing speed of the left machine gun, M134 or the drive and brake of the left Ml29 Grenade Launcher. 2. APPLICABLE DOCUMENTS 2.1 Th
3、e following documents, of the issue in effect on date of invitation for-bids or request for proposal, form a part of this speci- fication to the extent specified herein. SPECIFICATIONS Military MIL-W-13855 MIL-P-14232 - MIL-1-45607 - MIL-A-45967 - Weapons, Small Arms and Aircraft Armament Subsystems
4、, General Specification for. Parts, Equipment and Tools for Army Materiel, Packaging and Packing of. Inspection Equipment, Acquisition, Maintenance and Disposition of. Armament Subsystem, Helicopter: M28Al FSC 1090 Provided by IHSNot for ResaleNo reproduction or networking permitted without license
5、from IHS-,-,-i MIL-C-45956 (WC) STANDARDS Military MIL-STD-105 - Sampling Procedures and Tables MIL-STD-109 - Quality Assurance Terms and for Inspection by Attributes. Definitions. DRAWINGS Ro.ck Island Arsenal F11688531 - Controller, Weapons-Gun Speed and Launcher Brake, (LH) . IEL11688531 - Inspec
6、 tion Equipment Lis t. (Product drawings referenced in this specification form a part of F11688531; acceptance inspection and test equipment drawings form a partof IEL1168853.) PUBLICATIONS Rock Island Arsenal PU6885 31 - Packaging Data Sheet for Controller, Weapons-Gun Speed and Launcher Brake, (LH
7、). (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer . ) 3. REQUIREMENTS 3.1 First article. Requirements for submission of f
8、irst article shall be as specified in the contract (see 6.2). specified (see 6.2), the first article shall include a pilot pack (see 5.1). Unless otherwise 3.2 Materials, construction and design. Controllers shall conform to the material, construction and design requirements specified herein, on Dra
9、wing F11688531, and in MIL-W-13855. 3.2.1 Weight. The weight of the controller shall not exceed 8.5 pounds. 3.3 Functional requirements. 3,3.1 Power input. “he controller shall be capable of meeting the requireme&: specified herein, when supplied with 22 to 30 volts direct current (vdc) and a maximu
10、m rate of 3.5 amperes (amps). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-95956 10 9999906 0307bO9 9 MIL-C-45956 (WC) 3.3.2 Weapon clearing (7.62m). The weapon clearing function shall be performed utilizing the following relays: A7Kl A7K3 A
11、7K6 A7K7 A7K8 A7K9 . Time delay relay (7.62mm) Unclear relay Gate relay 7.62mm Low speed relay Clear/Uncear memory relay 7 62mm High/Low speed relay Relays A7Ki0, A7K12, connector A7J1 and pin E of connector A7P1 shall be energized when 22-30 vdc is applied to pins B, R and E of connector A7P1 and t
12、o A7S1. Any references to a circuit being energized shall assume the grounded (negative) side of the power supply is connected to pin V of connector A7P1. 3.3.2.1 Unclear mode (7.62mm). Relay A7K3 shall be energized when 22-30 vdc is applied to pin N of connector A7P1, thereby actuating all A7K3A qs
13、d A7K3B contacts relays A7K1, A7K7, A7KS (clear memory coil) and A7K9 (low speed coil X1-X2) shall be energized through the normally closed contacts A7Kll.A and closed A7K12B. Once reay A7K1 is energized, relays A7K6 and A7K8 (unclear memory coil) shall become energized through A7KlA contacts and po
14、wer from pin E of connector A7P1. clear memory position, contact A7K8B will be open and no voltage shall exist at pin P of connector A7P1. At this time, voltage shall exist at pin C of connector A7P2 and continuity shall exist between pins D and E of connector A7P2. Upon removal of power at pin C of
15、 connector A7P1, relays A7K7 and A7K8 (clear memory coil), and A7K9 (low speed coil Xl-X2) shall immediately deenergize. Relay A7K7 and A7K9 (low speed) contacts shall open removing power from pin C of connector A7P2 and cause an open circuit between pins D and E of connector A7P2. Relay A7K6 and th
16、e unclear memory coil of relay A7K8 shall remain energized from power applied to pin E of connector A7J1 and by the time delay action of relay A7IU for a-period of 250 + 40 milliseconds. Upon completion of the time delay period, relay A7K6 and A7K8 (unclear memory coil) shall be deenergized. Because
17、 of the latching action, relay A7K8 shall remain in the unclear memory position. is removed from pin C of connector A7P1. connector A7P1 from 22-30 vdc on pin R of connector A7P1 and diode CR12). A7K6A contacts shall remain closed during the time relay A7Kl is closed, and during the delay period. G
18、of connector A7P1. Applying 22-30 vdc to pin C of connector A7P1, Relay A7K8 will stay latched in the Relay contact A7K8B shall be closed at the time power (Power applied to pin P of Continuity shall exist between pins F and 3 /: - i 3 . .i Provided by IHSNot for ResaleNo reproduction or networking
19、permitted without license from IHS-,-,-MIL-C-45756 10 m 7777706 0307605 b II 1 MIL-C-45956 (WC) 3.3.2.2 Clear mode (7.62m).- Relay A7K3 shall not be energized (A7K3 contacts set in normal position) when 22-30 vdc is applied to pin C of connector A7P1, thereby energizing relays A7Kl, A7K6 and A7K8 (u
20、nclear memory coil). A7K7, A7K8 (clear memory coil), and A7K9 (low speed coil Xl-X2) shall become energized thrdagh relay contacts A7Kl and A7K3B with power on pin E of A7P1. Contact A7K6A shall close when power is applied to pin C of A7P1 resulting in continuity between pins F and G of A7P1. same t
21、ime providing power to pin P of A7P1. energized from A7J1 through A7K9A1, A7K9A2 and A7K7A contacts. Continuity shall exist between pins D and E of A7P2. pin C of A7P1, relay A7K6 and A7K8 (unclear memory coil) shall deenergize. This will latch relay A7K8 in the clear memory position where it shall
22、remain energized for completion of the time delay of relay A7Ki. A7Kl (time delay) shall maintain contact with A7KU (closed for a period of 250 + 40 milliseconds), thereby providing energy to relays A7K7 and A7K9 (low speed coil Xl-X2), and the clear memory coil of relay A7K8 until completion of the
23、 time delay period of relay A7Kl. of the time delay period, relay A7K8 shall remain in the clear memory position due to latching action. shall be no voltage on pin P of A7P1 from pin R of A7P1. shall open upon removal of power from pin C of A7P1. open circuit between pins G and F of A7P1. contacts A
24、7K9Al, and A7K9A2 and A7K7A2 shall open, removing power from pin C of A7P2. When relay A7Kl becomes energized, relays Relay A7K8 will stay locked in the unclear memory position. A7K8B shall close at the Pin C of A7P2 shall be When power is removed from Relay Upon completion Contacts A7K8B shall be o
25、pen, and there Contact A7K6A There shall be an At the end of the delay period, An open circuit shall exist between pins D and E of A7P2. 3.3.3 Low speed operation (7.62). “his function shall be performed by the following relays: A7Ki A7K6 A7K7 A7K9 Time delay relay (7.62) Gate relay 7.62 Fire relay
26、7.62mm High/Low speed relay For the low speed operation, power shall be applied to the same pins as required in the weapon clearing functions (see 3.3.2). relay functions shall apply in either the clear or unclear memory condition, and A7K9 (low speed coil) shall be energized. The contacts of relay
27、A7K7A2, A7K9A1, A7K9A2, A7K9B1 and A7K9B2 shall close. The contacts of relay A7K7A2, A7K9Al and A7K9A2 shall cause a redundant current path from A7J1 to pin C of A7P2. cause a current path from pin D to pin E of A7P2. Relay A7K6A shall close to provide continuity between pin G and pin F of A7P1. The
28、 same When 22-30 vdc is applied to pin C of A7P1, relays A7K7 Contacts of relay A7K9B1 and A7K9B2 shall iI i-*.=. 4 c , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-45956 (WC) 3.3.4 High speed operation (7.62mm). This function shall be per-
29、formed by the following relays: A7K1 A7K6 A7K7 A7K9 A7Kil Time delay relay (7.62mm clear) Gate relay 7.62m Fire relay 7,62mm High/Low speed relay 7.62m High speed relay For the high speed operation, power shall be applied to the same pins as required in the weapon clearing functions (see 3.3.2). fun
30、ctions shall apply in either the clear or unclear memory condition. When 22-30 vdc is applied to pin D of A7P1 all relay functions shall remain the same except that relay A7KllA contacts shall be open and relay A7K9 (low speed coil) shall not be energized. Relay A7K9 (high speed coil) shall be energ
31、ized from power on pin D of A7P1 through A7K12A contacts. With relay A7K9 (high speed coil) energized, A7K9 contacts A3, A4, B3 and B4 shall be closed, allowing a current path between pin E and pin F and between pin C and pin D of A7P1. Relay A7K7A contacts shall remain closed and a current path sha
32、ll exist between A7J1 and pin C of The same relay A7P1 o 3.3.5 Weapon enable. The weapon enable relay shall be energized by applying 22-30 vdc to pin B of A7P1. close providing a circuit to relay A7IU and associated relays, to provide power to either the high or low speed coils of relay A7K9. shall
33、close relay A7K9A or A7K9B contacts and provide a current path from A7J1 to pin C of A7P2, between pin D and pin E of A7P2 or between pin C and pin D and between pin E and pin F of A7P2. Relay contact A7KlOB shall open to provide an open circuit between pin L and pin A of A7P1. Prior to energizing r
34、elay A7Kl.0, a closed circuit existed from pin L to pin A of A7P1 through the A7KlOB contacts and diode CR13. A7KiOC shall close to provide power from pin M of A7P1 to relay A7K2 and A7K5 (relay coil). Relay contacts A7Kl.OD shall be closed and continuity shall exist between pins W and S of A7P1. Re
35、lay contact A7KlOA shall This Relay contacts 3.3.6 40m Gun drive. This function shall be performed by the following relays : A7K2 A7K5 A7K9 Time delay relay (4Omm clear) Drive latch relay 4Omm Drive brake relay The 4Omm gun drive function shall require 22-30 vdc applied to pins H, B and E of A7P1 an
36、d to A7J1. A7Ki0 which shall close contact A7KlOC. 22-30 vdc applied to pin M of A7P1 shall energize relay A7K2 through contact A7KlOC. become e&Egized after contact A7K2A closes in the ground side of the A7K5 relay coil and power is applied on the plus side of the coil from Power at pin B shall ene
37、rgize relay Relay A7K5 shall . . 5 S I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-45956 LO 9999906 030clb07 T pin M of A7P1, contact A7K1OC and CR3. when relay coil A7K5 is energized forming a holding current for relay A7K5 when power is
38、applied to pin H of A7P1. from the 40mm magnetic brake sensor in the turret of the M28 subsystem). Contact A7K2B shall close upon energizing relay A7K2 and the power shall be supplied to pin G of A7P2. Contacts A7K5B1 and A7K5B2 shall close when relay A7K5 is energized, thus applying power to relay
39、A7K9 (4Omm drive coil) through the normally closed contact A7Kl2B. coil shall be deenergized since contacts A7K5B2, A7K5B3 are open. will result in relay A7K9 being latched in the drive position with a current path from A7J1 to pin C of A7P2. and continuity shall exist between pins D and E of A7P2 t
40、hrough contacts A7K9B1 and A7K9B2. With relay A7K9 latched in the drive position, power shall be applied to the A7K9 relay brake coil through A7K9Al, A7K9A2 con- tacts, CR8 diode, A7Kl2C and A7Kl2A. Relay A7K9 shall remain in the drive position since the drive coil was energized before the brake coi
41、l. tinuity.shal1 exist between pin C of A7P2 and pin A of A7P3 and between pin F of A7P2 and pin D of A7P3. The A7K5A contacts shall close (Power on pin H is supplied Relay A7K9 brake This Pin C of A7P2 shall be energized Con- 3.3.7 4Omm Gun braking. This function shall be performed by the following
42、 relays: A7K2 A7K5 A7K9 Time delay relay (40mm clear) Drive latch relay 40m Drive/Brake relay The 4Onmi gun braking function shall require 22-30 vdc applied to pins H, B, and E of A7P1 and to A7JI. Power to pin B shall energize relay A7U0 which will close contact A7KlOC. When power is removed from p
43、in M of A7P1, relay A7K2 will remain energized for 500 + 50 milliseconds. All relays shall remain in the drive condition for 500 (ms) unless power is removed from pin H of A7P1. If power is removed from pin H, relay A7K5 will drop out of the drive condition imnediately. At the end of the 500(ms) per
44、iod or when power is removed from pin H of A7P1, relay A7K5 shall be deenergized. A7K9 through the A7K5B1 and A7K5B2 contact openings will allow relay A7K9 to latch in the brake position for a period of 15(ms) or less. Relay A7K9 (brake coil) shall be energized from A7J1, contacts A7K9A1, A7K9A2, di
45、ode CR8, A7Kl2A and A7Kl2C normally closed contacts. Relay A7K9 brake coil shall be held in the brake position from power applied through relay contacts A7K5B2, A7K5B3 and pin E of A7P1. .Power shall then be removed from pin G of A7P2 500 & SO(ms) after relay A7K2 is deenergized. to the brake positi
46、on shall cause contacts A7K9Al, A7K9A2, A7K9B1 and A7K9B2 to open while contacts A7K9A3, A7K9A4, A7K9B3 and A7K9B4 close in 15(ms) or less. Diode CR9 connected from pin G to pin F shall dissipate the reverse voltage caused by the motor shunt field collapsing. Diode CRlQ%hall be connected from pins E
47、 to C of A7P2 to dissipate the energy from the back EMF generated while the motor armature is being dynamically braked. Removing power from the drive coil of relay The action of relay A7K9 changing from the drive position 6 I Provided by IHSNot for ResaleNo reproduction or networking permitted witho
48、ut license from IHS-,-,-NIL-C-Ll55b LO M 9999906 0307bO L M MIL-C-45956 (WC) 3.3.8 Diodes. Diodes reverse connected across A7K3, A7K6, A7K7, A7Kl0, A7Kll and A7Kl2 relay coils, shall dissipate the induced voltage generated in the collapsing relay coil field. 3.3.9 Condensers. “he. condenser connecte
49、d across relay A7K1 shall absorb external switching voltage transients on pin C of A7P1, preventing relay A7K from being inadvertently energized. 3.4 Reliability. When specified in the contract (see 6.2), the controller shall have a minimum acceptable Mean-Mission-Between-Failure (MMBF) of not less than 1427 missions with a desired and specified MMBF of 2141 missions. A mission is defined as those functions of the con- troller necessary to si
