Common Missile Warning System Components
Electronic Control Unit (ECU)
Memory Card, PCMCIA
User Data Module (UDM)
Sensor, Electro-Optic, Missile,
Coarse/Acquisition - Miniature
Integrated GPS/INS Tactical System
Switching Unit, CM Dispenser
Dispenser, General Purpose A/C
CMWS Control Indicator, (CI)
CMWS Safe/Arm Control Panel
ECU Service Panel
dB Systems, Universal Audio
Interface Model 270
Wing Mounted Safety Switch
** Left Main Gear squat switch
(*5) Note: Final coniguration is the 5-sensor arrangement.
** While the LMG squat switch is not an integral component of the CMWS/ICMD, the system does take
advantage of the switch functionality by linking this switch to the SACP K1 relay. SACP K1 relay is one of the
in-series logic gates required to ARM the system.
(1) Electronic Control Unit. The ECU operates from 115Vac and +28Vdc power, but cannot turn on until it
receives a turn-on power control signal from the CI. The ECU is the control and main platform interface element of
the CMWS/ICMD. The main functions of the ECU are:
Analyze ultraviolet (UV) data from the EOMS for threats.
Send threat audio cues to platform ICS (via I/F Ampliier).
Send system health audio cues to platform ICS (via I/F Ampliier).
Send threat quadrant data to the CI.
Issue dispense commands to the Sequencer.
Manage CMWS/ICMD BIT and report results to the CI.
Manage lare and chaff inventory on CI (auto mode only).
Provide heater and logic power to the EOMS.
The ECU does not contain any controls or indicators. The front panel contains four electrical connectors, J1 through
J4, a covered Personal Computer Memory Card International Association (PCMCIA) slot, and two cooling fans. A