Asm - A318,a319,a320,a321 - Gow - 01-nov-2018 - Figure 26-12-00 Sch 00 P 0002 (sheet 1) - Fire Protection - Engine Fire And Overheat Detection - Block Diagram 6x5p3c

1TW CFDIU 31-32

5 G A 1(2) LGCIU-1(2) 32-31

DET-FIRE FA N LO O P A 26-12

THE FDU PROCESSES THE SIGNALS GENERATED BY THE RESPONDER OF THE DETECTORS. THERE ARE THREE FUNCTIONAL MODULES: - TWO INDEPENDENT CHANNELS (1 FOR EACH DETECTION LOOP) - ONE MONITORING CIRCUITRY (FOR MAINTENANCE PURPOSE ONLY).

LO O P A

DET-FIRE C O R E LO O P A 26-12

DET-FIRE ENG 1(2) PYLON LOOP A 26-12

115VU EACH CHANNEL HAS ITS OWN POWER SUPPLY.

MASTER 1 ON

- FIRE DETECTION FUNCTION   THE TWO CHANNELS OPERATE NORMALLY TOGETHER, WITH AN AND   LOGIC, FOR THE FIRE DETECTION. HOWEVER, IF ONE LOOP IS   INOPERATIVE, EACH LOOP CAN OPERATE INDEPENDENTLY IN THE   FIRE DETECTION FUNCTION.

OFF

FAU LT

1

LO O P B

DET-FIRE C O R E LO O P B 26-12

CRC/SC

5 K S 1( 2 ) A N N ENG 1(2) FIRE/FAULT 73-25

- OUTPUT SIGNALS   THE OUTPUT SIGNALS ARE GENERATED VIA DISCRETE SIGNALS   AND/OR ARINC 429 BUS. THE FIRE WARNING SIGNALS (AURAL   AND/OR VISUAL) THUS GENERATED ARE TRANSMITTED TO THE   COCKPIT.

1 W W 1(2) FWC-1(2) 31-52 20VU

THE MONITORING CIRCUITRY ANALYZES AND MONITORS CONTINUOUSLY THE FIRE DETECTION SYSTEM. IN CASE OF FAILURE OF THE SYSTEM THE MONITORING CIRCUITRY: - MEMORIZES THE FAULT IN A NON-VOLATILE MEMORY - ISOLATES THE FAULTY CHANNEL - GENERATES THE APPROPRIATE DISCRETE SIGNALS - TRANSMITS CONTINUOUSLY A SYSTEM STATUS MESSAGE TO THE   CFDIU VIA THE ARINC 429 BUS.

MASTER WARN

CRANK FIRE

- INPUT SIGNALS   EACH CHANNEL RECEIVES AND ANALYZES CONTINUOUSLY THE   SIGNAL GIVEN BY ITS DETECTION LOOP. THE ANALYSIS IS DONE   BY MEANS OF THREE COMPARATORS:   - THE FIRE COMPARATOR   - THE CONTAMINATION COMPARATOR   - THE INTEGRITY COMPARATOR

DET-FIRE FA N LO O P B 26-12

ENG 1

AGENT 1 F I R E

ENG 1(2)

SQUIB DISCH

AGENT 1 SQUIB DISCH

FIRE TEST

MASTER CAUT

WARNING DISPLAY

PUSH

1WD ENG/APU FIRE PNL 26-12

DET-FIRE ENG 1(2) PYLON LOOP B 26-12

2 W D 1(2) FDU-ENG 1(2) 26-12

N_SM_261200_B_010002__AC

Figure 26-12-00 SCH 00 P 0002 (SHEET 1) - FIRE PROTECTION - ENGINE FIRE AND OVERHEAT DETECTION - BLOCK DIAGRAM ** ON A/C FSN 001-007, 009-100, 201-300