DEVICE WHICH ALARMS ABOUT SQUIB CONDITION Russian patent published in 1997 - IPC

FIELD: automation, in particular, fire-protection systems which fire- extinguishers are triggered by explosion of squibs. SUBSTANCE: device has first power supply 1, commutation unit 2, second power supply 3, indication board 8, fire-extinguishing units 4 which provide matrix of m columns and n rows. Each fire-extinguishing unit has first resistor 9 and diode 10 and squib 11. Second and third resistors 11 and 13 are introduced to accomplish the goal of invention. In addition device has m+n OR gates 5 and m+n indication cells 6 each of which has transistor 17 and diode 15. EFFECT: improved testing, increased stability to noise. 1 dwg