<h2>Overview</h2>
<p>The <strong>Simplex 4904-9137</strong> is a visible notification appliance designed to provide reliable audible and visual fire alarm notification in commercial and industrial facilities. This discontinued model features a red lens with 15 candela (CD) light output operating at 1Hz flash rate, powered by 24VDC. Built with impact and vandal-resistant construction, the 4904-9137 serves as a dependable backup notification device for fire safety systems.</p>
<h2>Key Features</h2>
<ul>
<li>24VDC operating voltage with efficient switching regulator design</li>
<li>15 candela red strobe lens for high-visibility notification</li>
<li>1Hz flash rate compliant with fire alarm standards</li>
<li>Multi-surface compound reflector ensures symmetrical light output in key axis directions</li>
<li>Horizontal, vertical, or ceiling mounting flexibility</li>
<li>Impact and vandal-resistant construction</li>
<li>Over-voltage protection for flash discharge capacitor</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Model:</strong> Simplex 4904-9137</li>
<li><strong>Operating Voltage:</strong> 24VDC</li>
<li><strong>Light Output:</strong> 15 Candela (15CD)</li>
<li><strong>Flash Rate:</strong> 1Hz</li>
<li><strong>Lens Color:</strong> Red</li>
<li><strong>Type:</strong> Visible Strobe Notification Appliance</li>
<li><strong>Mounting Options:</strong> Wall, vertical, or ceiling</li>
<li><strong>Weight:</strong> 1.41 lbs</li>
<li><strong>Manufacturer Status:</strong> Discontinued by Manufacturer</li>
</ul>
<h2>Typical Applications</h2>
<ul>
<li>Commercial office buildings and multi-story facilities</li>
<li>Industrial warehouses and manufacturing plants</li>
<li>Healthcare and institutional buildings</li>
<li>Retail and hospitality environments</li>
<li>ADA-compliant fire alarm systems requiring visible notification</li>
<li>Retrofit projects in facilities with existing Simplex fire alarm infrastructure</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Simplex fire alarm control panels and systems</li>
<li>24VDC fire alarm notification appliance networks</li>
<li>Notification appliance circuits (NAC) in standard and synchronized modes</li>
<li>NFPA 72 National Fire Alarm Code compliant systems</li>
<li>ADA accessibility standards for fire safety notification</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>This is a legacy model; verify compatibility with your existing system before ordering</li>
<li>Direct replacement part number 0626270</li>
</ul>
<h3>Works With</h3>
<ul>
<li>Simplex fire alarm control systems (various series)</li>
<li>24VDC notification appliance circuit wiring</li>
<li>Free-running and synchronized strobe modes</li>
<li>Standard fire alarm system protocols and configurations</li>
</ul>
