The System Sensor SS-24 sounder strobe is intended to be connected to the alarm indicating circuit of a listed fire alarm control panel. Both are compatible with DC line supervision. Besides, the model MA12/24D is suitable for connection to either a 12 or 24 volt panel. Also, the System Sensor SS-24, SS24M, MASS24LO and MASS24M require 24 volt panels; models SS12LO, MASS12LO and MASS12M require 12 volt panels. Horn, strobe, or combination strobe models may be used with panels that have full wave rectified, unfiltered supplies.
The MA12/24D sounder and MASS12/24 sounder/strobes are suitable for outdoor applications (–35°C to 66°C) when used with a Weatherproof Back Box (Model WBB) as tested by UL. In Canada, rigid steel conduit must be used when installing the Weatherproof Back Box. The light output of the SS12LO, SS24LO, MASS12LO and MASS24LO is 1.5 cd min @100% viewing angle. The light output of the SS24M, MASS12M, and MASS24M is 15 cd min @100% viewing angle.
In general, there are eight different sounds that can be selected on the electronic sounder by adding or removing tab clips (see Figure 4). Furthermore, the sound selected will determine the maximum current and sound power output per device. See Table 2 for these values.