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Indicating circuit drivable by two levels

A technology of indicating circuit and level drive, which is applied in the direction of electrical components, electronic switches, pulse technology, etc., can solve the problem that the indicating circuit cannot be applied at the same time, and achieve the effect of convenient and flexible operation and simple principle

Active Publication Date: 2019-01-15
XUJI GRP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an indicating circuit applicable to two levels of driving, which is used to solve the problem that the existing indicating circuit cannot be applied to two levels of driving at the same time

Method used

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  • Indicating circuit drivable by two levels
  • Indicating circuit drivable by two levels

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Embodiment Construction

[0014] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0015] The indication circuit applicable to two level driving of the present invention is as figure 2 As shown, including the optocoupler OP1, the two ports on the primary side of the optocoupler OP1 are respectively connected to the first power interface and the first interface XH1, and the first power interface is connected to the first power supply, such as a 5V power supply, and the 5V power supply is connected through the current limiting resistor R1 One port on the primary side of the optocoupler OP1 is the anode of the diode on the primary side of the optocoupler OP1, and the two ports on the primary side of the optocoupler are also connected in parallel with a threshold resistor R2. The two ports on the secondary side of the optocoupler OP1 are respectively connected to the second power interface and the second interface XH2, and th...

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Abstract

The invention relates to an indicating circuit drivable by two levels. Each of the primary side and the secondary side of an optical coupler is connected with a power source having a corresponding voltage level and an interface to be connected with a driving signal corresponding to the power source. Both two level driving signals can drive the LED of the indicating circuit if valid so as to realize the indication function of the power sources. The indicating circuit of the invention is simple in principle and can be adapted to two level driving signals simultaneously. When the first power source is required, the driving signal of the first power source is connected to the first interface so as to turn on the indicating circuit of the present invention. When the second power source is required, the driving signal of the second power source is connected to the second interface so as to turn on the indicating circuit of the present invention. The first interface and the second interface can be used when connected, thereby achieving convenient and flexible operation.

Description

technical field [0001] The invention belongs to the technical field of relay protection level drive, and in particular relates to an indication circuit suitable for two level drive. Background technique [0002] The level-driven indicating circuits in relay protection are designed separately and designed as independent level-driven indicating circuits, such as figure 1 In the indication circuit shown, the power supply VCC is connected to the drive signal interface through the sequentially connected current-limiting resistor R and light-emitting diode LED. When the drive signal interface is connected to the low-level active drive signal of the power supply VCC, the indication circuit The light-emitting diode is turned on, which plays the role of level-driven indication under the power supply. [0003] In the field of relay protection level drive, the most commonly used levels are 5V and 24V. For example, the general CPU uses a 5V drive signal, while the outlet relay uses a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/00H03K17/18
CPCH03K17/005H03K17/18Y02B20/40
Inventor 龚兴全张改杰周俊华马志敏陈号江燕良孙世杰李莎莎余维高胡凯利姚艳艳王京
Owner XUJI GRP