SL1-240R by Danaher

The SL1-240R is a panel-mount indicator lamp produced by Danaher within the Timers and Controllers series. It fits a compact opening in a control panel and provides a steady visual signal powered directly by an AC supply. When its control circuit is energized, the lamp gives operators immediate feedback about machine states or alarm conditions in industrial automation cells. A locknut and gasket secure the threaded body so that shock and vibration in factory environments do not loosen the assembly.

Rated for 240 VAC, the lamp can be wired in parallel with contactor coils or output relays, causing it to illuminate only while those components are active. The internal conductors are copper, and the PVC insulation on the leads supports a system potential of up to 300 V without electrical breakdown. The lamp can operate at ambient temperatures of up to 45 °C, allowing its filament to dissipate heat safely inside the enclosure. A noncondensing humidity limit of 95% RH helps prevent moisture from fogging the lens or corroding the contacts. Its insulation system withstands temperatures of up to 105 °C, supporting operation when the panel experiences elevated internal heat. The attached wire leads eliminate the need for a separate lamp holder and provide direct conductors for panel wiring.

The indicator is supplied with 18 in PVC-jacketed leads that can be routed through panel wire ducts. A panel opening of 5/16 in allows the threaded bushing to seat firmly while the locknut holds the assembly in position. The overall height of 5 in keeps the lens visible above nearby panel hardware without requiring a separate mounting bracket. A single incandescent bulb produces a steady output behind a red lens, making the illuminated state easy to recognize. A black top cap limits side glare and directs the visible light through the front face of the indicator.