HSMH-C170 Optoelectronics

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LED indications have become a necessity in applications such as industrial motor drive systems, robotics, home automation and virtually every other electrical and electronic device that requires level indication. In particular, one of the most popular and useful LED indicators is the discrete type, classified as HSMS-C170. This device provides a fast, accurate, and cost-effective signal to the user in a wide variety of applications.

Overview of HSMS-C170

The HSMS-C170 is a discrete type LED indicator device with a compact design, allowing it to be easily installed in applications that require level indication. It consists of two parts: a semiconductor chip and a light emitting diode or LED. The input circuit of the device consists of two transistors that convert the AC or DC input signal to a standard logic level signal. The logic level is then processed by the chip, which accurately translates the signal into the corresponding LED indicator status.

Types of Indication

There are three types of indication provided by the HSMS-C170; Latching, Non-Latching and Two-Stage. In Latching mode, the LED will remain illuminated until the status of the input signal changes. The Non-Latching mode is designed to flash a LED on and off at different rates, such as 40Hz, 30Hz or 10 Hz. The Two-Stage indication mode is similar to Latching mode, but allows for two distinct indication levels; for example, green for high status and red for low status.

Applications

HSMS-C170 LED indicators are suitable for a wide variety of applications, some of which include:

• Control panels
• Instrumentation applications
• Motor starter control systems
• Industrial automation systems
• Vehicle current/voltage monitoring
• Medical device applications

Features

One of the major advantages of HSMS-C170 LED indicators is that they provide an easy to read and reliable indication of the status of the input signal. The following features contribute to this reliability:

• Forward voltage range of 3-18V
• Reverse current protection
• High surge voltage protection
• High temperature range of –40°C to +125°C
• Various LED color options such as red, green, yellow and blue

Working Principle

The working principle of the HSMS-C170 LED indicator is quite straightforward. First, an AC or DC voltage is supplied to the input terminals of the device. Once the input has been applied, the transistors in the input circuit will convert the voltage into a standard logic level signal. This signal is then processed by the device’s chip, which converts the signal into the corresponding LED indication state. Depending on the chosen indication mode, the LED will remain illuminated or flash on and off.

Conclusion

The HSMS-C170 is a reliable and versatile LED indicator for providing cost-effective level indication in a wide variety of circuit applications. With its forward voltage range of 3-18V, reverse current protection, high surge voltage protection and temperature range of -40°C to +125°C, it is well suited for industrial motor drive systems, robotics, home automation and virtually any other electrical and electronic device that requires level indication. The HSMS-C170 is a strong candidate for any application that requires discrete LED indication.

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