Smoke Alarm, Photoelectric, Surface Mount, 240V 9V D.C., Backup

Smoke Alarm, Photoelectric, Surface Mount, 240V 9V D.C., Backup

Smoke Alarm, Photoelectric, Surface Mount, 240V 9V D.C., Backup

Item Number: 755PSMA4





Fire Tek

Product brand


Product or component type

smoke detector

Device application

early detection of smouldering fires and open fires

Sustainable offer status

Green Premium product


Quantity per set

set of 1

Type of packing




Function available

  • local alarm
  • hush function
  • self-test of smoke detection
    • Control type

      button (test/hush function)

      Operating distance

    • 50 m indoor use line of sight
    • 140 m in free field
      • Local signalling

      • visual: 1 LED (red) for warning and low battery
      • visual: 1 LED (green) for ON status
      • sound: signal
      • sound: alarm
        • Connections - terminals

        • (line) - 2 x 1.5 mm²
        • (neutral) - 2 x 1.5 mm²
        • (earth loop) - 2 x 1.5 mm²
        • (interconnect) - 2 x 1.5 mm²
          • Type of installation


            Device mounting


            Mounting support

          • ceiling
          • wall-mount
            • Fixing mode

              by screws


              47 mm

              Ambient air temperature for operation

              0-45 °C

              Relative humidity

              5-95 %

              Product certifications

            • RCM
            • SAI
            • Activfire
              • Standards

              • ISO 8201
              • AS 3786:2014
              • AS/NZS 60950.1
              • AS/NZS 60065
                • REACh Regulation

                  Free of Substances of Very High Concern above the threshold

                  REACh free of SVHC


                  EU RoHS Directive


                  Mercury free


                  RoHS exemption information


                  China RoHS Regulation


                  Environmental Disclosure


                  Circularity Profile



                  Electronic sensor type

                  photo-electric sensor

                  [Us] rated supply voltage

                • 50 Hz
                • 220...240 V AC
                  • Backup type


                    Battery life

                    1 year(s)

                    Output voltage limits

                    interconnection: 6.5...20 V

                    Type of alarms

                    low battery at 6.9...7.5 V

                    Detection type


                    Number of devices

                    40 for wired alarm

                    Response time

                    < 30 s

                    Noise level

                    85 dB at 3 m, minimum

                    Time delay range

                  • 10 min (hush)
                  • 10 h (do not disturb)
                    • Diameter

                      140 mm

                      Package 1 Weight

                      331 g

                      Package 1 Height

                      53 mm

                      Package 1 width

                      145 mm

                      Package 1 Length

                      145 mm
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                      Frequently Asked Questions

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                      Is the PDL SD100 Smoke alarm base interchangeable with the 755PSMA4 smoke alarm?

                      Yes, the the 755PSMA4 will fit on the PDL SD100, 755PSMA, 755PSMA2 bases.

                      For further information please visit

                      What causes the smoke alarm to continuously beep ?

                      The dust inside the smoke alarms can cause a continuous beep.
                      Please follow the regular maintenance check to avoid this.

                      Vacuum the smoke alarms using a soft brush attachment-
                      Keeping your smoke alarm free of dust particles, dirt, kitchen grease or cobwebs will help you reduce false alarms and ensure any smoke can easily reach the internal sensing chamber.

                      Clean and wipe down around unit-
                      Clean around the smoke alarm unit and remove any insects or other contamination which may have occurred. Spray bug repellent on a cloth and wipe the ceiling around the smoke alarm to act as a future bug deterrent. Clean every 3-6 months to mitigate insect ingress.


                      Attached is the Clipsal smoke alarm troubleshooting guide for more info.

                      Clipsal Smoke Alarms.png

                      Can the new smoke alarms fit onto the 755SMA, 755PSMA, SD100 or SD200 mounting base?

                      Yes, the new Gen 2 smoke alarms are 100% backwards compatible. They can clip straight onto the existing mounting bases. The new smoke alarms are also compatible with wired interconnection of all alarms mentioned above as well as the existing 756 isolated relay module. 

                      Is the 755PSMA4 inter connectable with the old PDL SD100 Smoke alarm?

                      Yes, the PSMA4 range is backward compatible with the PSMA2 and SD100 range of smoke alarms.

                      For further information please visit

                      How do you Interconnect a 755RFB2 smoke alarm bases with a 755LPSMA4 smoke alarm?

                      See the below "How to video".

                      The part number for the products seen in this video is a 755RFB2 base and a 755LPSMA4 smoke alarm.

                      For further information please visit 
                      Smoke alarm:
                      Wireless base:

                      What size relay is in the 755RB?

                      The 755RB has a 2A relay.

                      Some of the key features are:
                      • Integral 2A Isolated voltage free changeover relay
                      • Control/activate third party devices (i.e. lighting, security, or home automation systems)
                      • Dry contact input for remote test/hush functions from a momentary switch
                      • Suitable for use with 755PSMA2 and 755RLPSMA2 smoke alarms

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