MIL-DTL-62545E
3.3.10.3 Input voltage decay. The MSEC shall not false alarm when undergoing input voltage decays resulting
from prolonged operation without recharging of the batteries (see 4.6.5.3).
3.3.10.4 Steady state voltage extremes. The MSEC shall sustain no damage from the application of any steady
state voltage up to 40 V dc (see 4.6.5.4).
3.3.11 Polarity. The MSEC shall operate with a negatively grounded electrical circuit to the vehicle battery. The
MSEC shall withstand a 28 V dc reverse polarity for a period of 30 minutes without false discharge or damage to any
components (see 4.6.6).
3.4 Performance.
3.4.1 Response time. At operating voltages between 16 and 30 V dc, and at temperatures of -17°C to 71°C (1°F
to 160°F), the MSEC shall respond to an activation signal within 2 ms (see 4.6.7.1).
3.4.2 Small fire logic. When small fire signals (signal A of table I) are input to the appropriate sockets of connector
J3 (see table IV), the output signals on the fire warning lamp and audible fire warning pins in connector J1 shall be
3.4.3 Large fire logic. The MSEC shall produce extinguisher drive signals in accordance with figure 1 when a large
fire signal is supplied for 1 to 2 s to appropriate sockets of connector J3 (see table II and table IV) (see 4.6.7.3).
3.4.4 Electrical-manual release. An electrical-manual release signal to the appropriate pin of connector J1 as
specified in table II shall result in output signals on applicable extinguisher activation sockets of connector J2
3.4.5 Extinguisher status. Loss of continuity on the activation circuit or on the pressure/flow circuit for a particular
extinguisher shall result in output of signal D of table I on the respective extinguisher status lamp signal pin of
3.4.6 BITE. When a BITE activation signal (signal A of table I) is provided at the appropriate pin of connector J1
(see table II), it shall produce BITE signals at the appropriate sockets of connector J3 (see table IV). Upon receipt of
signals on all large and small fire signal input sockets (see table IV), and verification of proper MSEC operation, the
MSEC shall produce a BITE "pass" signal at the appropriate pin of connector J1 (see table II). If the MSEC does not
receive all fire signals within 5 s or the MSEC is not functioning properly, a BITE "fail" signal shall be produced on pin
K, as well as "fail" signals for each defective component at the appropriate pin(s) of connector J1 (see table II). The
3.4.7 Electromagnetic interference (EMI). The MSEC shall meet the following requirements of MIL-STD-461:
Conducted emission:
CE01, CE04
Conducted susceptibility:
CS01, CS02, CS06
Radiated emission:
RE02, RE02.1
Radiated susceptibility
RS02, RS03, RS03.1 non-sheltered.
In addition, the narrowband conducted emissions shall be in accordance with the limits of figure 4.
14
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business