Electronic Safe,
Arm and Fire Device

The ESAF is stud-mounted to the warheads and is suitable for use in a bomb, missile or undersea environment. It contains environment sensors, safe/ arm logic, a high voltage DC-DC converter and one or two Exploding Foil Initiators with individual delay timers and firesets. This highly reliable unit has no moving parts or adjustments.

The validation function receives and checks signals for all environments simultaneously, enabling arming on proper sequence and time windows while also detecting complex disarm/dud conditions.

Unit built-in test is performed on power-up and results are reported to the missile. Downloading of delay data can be performed in-flight over a dedicated serial channel. A telemetry interface is provided for tests. The unit will cool itself by convection. The modular design of the ESAF permits easy reconfiguration to new applications. L-3 Communications, Electrodynamics, a leader in solid- state safe/arm technology, has also produced electromechanical S&As for missiles, bombs, artillery and torpedoes.