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relay base for 230v surface smoke alarm


Smoke Alarm Surface, Remote Test/Hush Function, Relay Mounting Base For 240V, 2A

relay base for 230v surface smoke alarm
Colour: Per UOM Std.
  • 1 PCE
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Key Features & Specifications

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  • 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
  • Fast and easy installation
Product brand
EU RoHS Directive
Will be compliant – Date to be confirmed

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Frequently Asked Questions

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does the 755RB has voltage free contacts?

Yes it has 2A 250v AC rated NO & NC voltage free segregated contacts.


What is the “Global/Local” switch for on the rear of the 755PSMA2 smoke alarm?

This switch is specifically for use with the 755RB relay base only. It defines how the relay in the 755RB will operate. The smoke alarm can be configured so the relay in the base operates only when the local alarm is activated (Local switch position) or when any interconnected alarm activates (Global switch position). 

Which smoke alarm can be used with 755RB mounting base with integrated relay?

755RB relay base is suitable for use with 755PSMA2 and 755RLPSMA2 surface mount photoelectric smoke alarms.
For further information, please visit:
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When interconnecting 755PSMA2 smoke alarms and using the new 755RB base do all smoke alarms need to have the RB base to be tested remotely?


Only one 755RB base is required to test the interconnected smoke alarms. Hushing of smoke alarms in alarm state  can only be done remotely if the alarm that has triggered the event is the alarm with the 755RB base , If this is not the case then the alarms must be hushed manually from whichever 755 unit has caused the alarm initially.
This is to ensure that alarms are not Hushed remotely without full inspection of areas containing all interconnected smoke alarms which may be sounding due to a genuine issue but not seen from the remote location .

Can the new 755PSMA2 smoke alarms be connected to home automation systems, such as C-Bus?

Yes, by using the 755RB optional relay base. The relay base can be connected to an auxiliary input type device such as a C-Bus bus coupler so that when the relay in the smoke alarm base operates, it triggers the system according to its programming. The system may then be programmed to send push notifications to a smart device or to trigger an event like enabling exit lighting, or triggering an “all lights on” function. The remote test/hush input on the 755RB can be connected to a relay on a home automation system (e.g. C-Bus Relay), so that the system can test/hush the smoke alarm as well. 

Which type of switch should be used for the RemoteTest/Hush feature on the 755PSMA2 Smoke alarm?

Any 240V momentary switch, such as a 30MBP Bell Press Switch can be wired to either of the two new mounting bases 755RB or 755RFB up to 20m away. A relay can also be pulsed on momentarily via a security or home automation panel to activate the test/hush function. 

Can the Clipsal 755PFM have a remote switch fitted for test/Hush function?

Yes, but the optional mounting base 755RB (Mounting Base with Integrated 2A Relay and Remote Test/Hush Function ) or 755RFB (Mounting Base with Wireless Interconnect and Remote Test/Hush Function) must be added. The feature can be wired through any momentary switch. Once activated, normal operation resumes after about 10 minutes.

Is there a device that turns my lights on when my smoke alarm goes on?

Yes, if you have a 755PSMA2, you can use the 755RB Base which has a set of built in contacts or you can use a 756 Isolation unit which also carries out the same task.


What are the best SD100 and SD200 smoke alarm replacements?

The photoelectric Clipsal 755PSMA4 is the replacement for both, even though the SD100 was ionisation type as we no longer supply that type. There is also available a 755RLPSMA4 with a rechargeable lithium backup battery. All current smoke alarm models are compatible and inerconnectable with previous versions. Also available are the 755RFB mounting base with wireless interconnect, the 755RB mounting base with integrated relay, and the 755PFM flush mount.

Do Clipsal offer a Smoke detector with built in emergency light ?

No they don't , but we do have a Relay base 755RB that can be added to our 755PSMA2 alarms that can be used to switch on emergency lighting etc.
For more information on this product and others like it please visit the Clipsal website on the link provided.
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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

For further information please visit