Securiton ASD 531, Technical Description, Page: 9 / 105

General
ASD 531, Technical description, T 140 416 en 9 / 105
Contents
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1 General 13
1.1 Purpose 13
1.2 Uses and applications 14
1.3 Abbreviations, symbols and terms 14
1.4 Product identification 16
1.5 Smoke sensors used 17
1.6 Hardware / firmware 17
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2 Function 18
2.1 General operating principle 18
2.2 Electrical functional principle 19
2.2.1 Power supply 19
2.2.2 Fan control 20
2.2.3 Microcontroller 20
2.2.4 Programming / operation 21
2.2.5 Displays 22
2.2.6 Relay 22
2.2.7 Outputs 23
2.2.8 Input 23
2.2.9 Interfaces 23
2.2.10 Airflow monitoring 24
2.2.11 Smoke sensor monitoring 24
2.2.12 Alarm release 24
2.2.12.1 Isolating the smoke sensor 24
2.2.13 Fault triggering 25
2.2.14 Event memory 25
2.2.15 Data logging on the SD memory card 25
2.2.16 Reset types 26
2.2.16.1 State reset 26
2.2.16.2 Hardware reset 26
2.2.16.3 Initial reset 26
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3 Design 27
3.1 Mechanical 27
3.2 Electrical 29
3.3 Hardware / firmware 30
3.4 List of materials / components 31
3.5 Packaging 31