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MIL-46390(MU)
exhibited at pins specified above (3.6.6),
shall open removing the double
28 Vdc shall appear at pins:
ground from i of J2 and J3.
(a) B and f of J5.
(d) 28 Vdc shall exist between pins A
and j of J2 and between pins
(b) F and f of J5.
F and j of J3 (voltage drop
across normally open contacts
(c) P and f of J6.
leading to squibs).
(d) M and f of J5.
3.6.5.1 SS coil and interrupter opere
tion. Each time. the 28 Volt-supply between
3.6.7 Relay K28 operation. With
28
pins L, J and M of J1 is interrupted and
Vdc applied to E and D of J1 the following
reapplied, the wiper arm of the stepping
shall prevail:
switch shall move to the next firing position
applying 28 Vdc to the respective firing re-
(a) 28 Vdc shall exist at H of J6 and
lay and pins of J2 and J3.
U of J1.
3.6.5.2 Typical sequential firing oper-
(b) No voltage shall be present at V
tion. The operation specified in 3.6,5.1 shall
of J1.
be typical for all 24 firing relays and as-
sociated pins for J2 and J3 During the
3.6.7.1 When 28 Vdc is applied to pin
sequential firing, the zero indication lamp
C of Jl, 28 Vdc shall be present at pin E
shall remain deenergized. The normally
of J6 and pin W of J1.
closed contacts, shunted across the normally
open contacts of the respective relay being
3.6.8 Diode
CR86. When pin B of J7
q
energized for firing, shall open removing
and pin G of J6
are electrically connected
the double ground from j of J2 and J3.
together, CR36
shall conduct and 28 Vdc
shall be present
at pin E of J7.
Upon completion
3.6.5.3 Reset to zero.
of the sequential firing operation, the wiper
3.6.9 Continuity.  Continuity between
arm of the stepping switch shall be capable
pins specified below shall be less than 0.1
of being reset to the zero position, at which
ohm:
time the zero indication lamp shall be
illuminated.
(a) F (J6) and D (Jl).
(b) E (J6) and W (Jl).
3.6.6 Explosive - bolt operation. With
28 Vdc applied at pin C of J7, 28 Vdc shall
(c) II (J6) and U (Jl).
exist at the following pins:
Weight. The interconnecting box
(a) D and f of J&
3.7
shall not exceed 35.5 & 0.6 pounds.
(b) H and f of J5.
4,
QUALITY ASSURANCE
(c) K and f of J&
PROVISIONS
(d) S and f of J5,
Responsibility for inspection. The
4.1
supplier is responsible for the performance
of all inspection requirements as specified
3.6.6.1 Time delay. one-tenth (0.1)
herein. Except as otherwise specified, the
second + 2 milliseconds after the 28 Vdc is
4

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