2195A4-6V

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Part Status:	Obsolete

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Panel Indicators, Pilot Lights 2195A4-6V Application Field and Working PrinciplePanel indicators, such as 2195A-4-6V, are used to indicate the status of a process or the status of a control device. The indicators are typically either on or off, and some models can be set to indicate multiple operating modes. Panel indicators consist of a power source (typically a low voltage DC) and a series of LEDs, which are the light source for the panel indicator.Panel indicators are often used to sense and indicate a variety of process and equipment conditions. The conventional type of indicator uses a central sensing element, usually a switch, connected to a central power source and a series of LEDs. The LEDs are wired so that when the switch is activated, a voltage is applied to one or more LEDs, activating the indicator light and changing the indication from off to on, or vice versa.The 2195A4-6V uses an LED series that is supplied with up to 6V. The LEDs are rated for a current ranging from 2 to 5mA. The indicator has a certain maximum continuous current level, and the minimum current level is determined by the number of LEDs connected in series. The power source for the indicator is typically a low voltage DC or an integrated battery. In terms of the working principle, the 2195A4-6V indicator features an alternating current output, meaning the current in the LEDs varies at a certain frequency, usually 50/60Hz. The variation of the current is due to the switching action of the alternating current supply. When the current in the LEDs is on, the LED in the indicator is lit, and when the current is off, the LED in the indicator is not lit. Depending on the application, a 2195A4-6V indicator can be used as a basic binary on/off indicator, or more complex functions can be achieved if additional subsystems are involved. For instance, an adjustable timer can be added to the indicator\'s system, allowing the LEDs to flicker at a specific frequency. This type of setup is commonly used in the switching of multiple power sources for indication purposes, such as a green LED indicating a steady state and a red LED indicating time-based switching or alarming.The LEDs in a 2195A4-6V indicator can also be set up to be operationally independent, with each LED indicators signaling its own unique process or equipment condition. This could be used to indicate level or flow rate changes, or the color of the light emitted from the LEDs can be adjusted to provide information about the type of process or equipment condition being monitored. Additionally, depending on the power requirements of the system, current limiting resistors and other components can be added to work in conjunction with the LEDs so that the current flowing through the system is kept within a certain range. This is done to avoid over- or under-driving the LEDs, potentially leading to damage to the system or poor performance.Overall, the 2195A4-6V indicator is an excellent choice for monitoring and indicating process or equipment conditions. Its versatile features and adjustability make it suitable for a wide range of applications, from basic binary on/off indication to more complex, multi-functional installations.

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