2151A3

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Panel Indicators, Pilot Lights

The 2151A3 is a panel indicator, pilot light used primarily for indicating the status of various systems. This device features two wattages, four contact spans, two mounting configurations and two lens styles.

Application Field

The 2151A3 is primarily used in industrial sites, such as factories, factories, machine shops, and other areas where the user needs to know the status of the system without actually entering the system or manually checking it. It is also suitable for use in home, office, and so forth. Additionally, the device is suitable for use on shipboard applications, due to its electrical grade plastic construction.

Working Principle

The 2151A3 employs a voltage input signal, which is converted into a signal at the pilot light tip. When the voltage exceeds a certain level, a voltage-dependent indicator will light up. This indicates the level of the voltage, i.e. whether it is in the normal working range or not. The device employs current-limiting components, ensuring minimal current goes into the pilot light tip, avoiding any sort of damage.

Wattage Ratings

The device is available in two wattage ratings, 0.5 W and 1.0 W. The 0.5 W version can be used for standard indication purposes, while the 1.0 W version is suitable for brighter indications. Both versions require a forward voltage of 11 VDC. Additionally, the device should be wired in such a way that the P1 and P2 terminals of the lamp are connected to the power terminals.

Contact Rating

The 2151A3 is available with two contact ratings - 2A and 5A. For the 2A contact rating, the wiring should be such that the P1-P2 terminals of the lamp and the contacts are connected to the power terminals. The 5A contact rating should also be wired this way, with the addition of a 10-amp fuse between the terminal bus and the P1-P2 terminals of the lamp.

Mounting Configuration

The device is available with two mounting configurations, panel mount and screw mount. The panel mount should be secured to the board using the four #4-40 screws that come with the device. For the screw mount configuration, the device should be secured to type 4 screw mount cabinets using the four #6-32 screws. The mounting protocol varies depending on the mounting configuration. For the panel mount configuration, care should be taken to ensure that the four #4-40 screws are tightened properly.

Lens Styles

The 2151A3 is available in two different lens styles: flush mount and gasket mount. For the flush mount configuration, the device should be installed flush with the surface of the board. The gasket mount should be installed with the use of a gasket and a metal guard which can be mounted to the surface of the board with screws.

Conclusion

In conclusion, the 2151A3 is a panel indicator, pilot light used primarily for indicating the status of various systems. It is available in two wattage ratings, two contact ratings, two mounting configurations, and two lens styles. The device features current-limiting components, ensuring minimal current goes into the pilot light tip, avoiding any sort of damage. The device should be wired and installed as per the protocol demonstrated in this article.

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