Ref. 1043/231 – 1043/232 Mod. 1043 - DOMUSWIRE

DESCRIPTIONThe operating principle of the optical-temperaturedetectors Ref. 1043/231 and Ref.1043/232 isbased on analysis of the spreading of light causedby the particles of smoke present in the air and ona temperature sensor with an alarm threshold at55°.The detector acts as automatic gain control; amicrocontroller calculates the compensation of thereading to maintain constant sensitivity over time,correcting any increased level due to the deposit ofdust inside the analysis cell. A red led indicates thefollowing detector conditions: during normaloperation it flashes briefly every 4 seconds; in theevent of a fault or maintenance it flashes for half asecond once a second; in the event of an alarm,the indicator glows steadily.The detector Ref.1043/232 has a base with relaywith NC and NO contacts for activating externaldevices in the event of an alarm..ASSEMBLY AND INSTALLATIONINSTRUCTIONSInstall the ceiling detector using 2 bolts.The detector is connected to the base making thereference arrows coincide.After installation and before testing, remove thedust cover from the detector.ReferencearrowTRADIZIONALEALIM. ALLARMEABCN1CON RELEINOUTSCRNA NC COMCN2INDICATOR LEDSBrief flash every foursecondsGlowing steadily½ second flash once asecondnormal operationalarmmaintenance or faultCONNECTION TERMINALSTerminals Description– Power negative+IN Power positive input+OUT Power positive outputSCR (*) Do not useNO (*) Alarm relay NO contactNC (*) Alarm relay NC contactCOM (*) Alarm relay common(*) Only on detector Ref.1043/232NOTE: if only one detector is installed, or if it is thelast device on the line, connect the line endresistance between the +OUT and terminals.In a fire alarm system the position of jumper CN1must be the following:Ref.1043/231: position BRef.1043/232: position A2 (DS1043-078)