3 7
APPENDIX 6
Recommended wiring diagrams
Typical active detector circuit wiring
(models SPD-3.1M, SPD-3.5, SP-2.1, SPT-2B, SPT-3 and others)
Figure 6.1
The number of detectors in AL should be such that the total current consumption of all detectors in
standby mode would be not more than 3 mA. According to EN 54:2-2003 up to 32 detectors can be
interconnected in one AL.
CLR=680Ohm-1,2kOhm
EOL resistor=3kOhm-3,6kOhm
Typical heat detector circuit wiring
(models TPT-2, TPT-3, SPT-1A, SPT-2A, SPT-3A)
Figure 6.2
The number of detectors in AL should be such that the total current consumption of all detectors in
standby mode would be not more than 3 mA. According to EN 54:2-2003 up to 32 detectors can be
interconnected in one AL. Recommended CLr – 680 Ohm. EOL resistor – 3,3 kOhm.
CLR=680Ohm-1,2kOhm
EOL resistor=3kOhm-3,6kOhm
