Circuit and method for acquiring conditional information for fault-oriented safety

A conditional information, safety-oriented technology, applied in electrical program control, program control in sequence/logic controllers, etc., can solve problems such as limiting the application range of circuits, and achieve the effect of reducing the number and expanding the applicable range
CN106019990BActive Publication Date: 2018-10-16CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CRSC RESEARCH & DESIGN INSTITUTE GROUP CO LTD
Publication Date
2018-10-16

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Abstract

This application provides a fail-safe condition information acquisition circuit and method. The condition information acquisition circuit includes: condition interface Input, first switch T1, second switch T2D, third switch T3C, first optocoupler T2C, second Optocoupler T3D, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, fifth resistor R5, sixth resistor R6, seventh resistor R7, first power supply VCCTJ and second power supply VCC. In this application, the condition information acquisition circuit can realize the input of two kinds of condition information through a condition interface, which reduces the number of condition interfaces and ensures that the condition information input through the condition interface will not be misidentified when the circuit fails .
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Description

technical field

[0001] The present application relates to the field of railway traffic safety, in particular to a circuit and method for acquiring condition information for fault-oriented safety. Background technique

[0002] Generally, railway traffic safety-related equipment (for example, track circuit transmitters) are versatile, and can be adapted to different site requirements by setting different parameters. Condition information, the man-machine interface used to set parameters is called condition interface. At present, the condition information of railway traffic safety-related equipment is obtained through the condition information reading circuit. When the condition information reading circuit fails, it is necessary to ensure that the set condition information will not be misidentified by the controller.

[0003] Among them, the current condition information reading circuit generally adopts such as figure 1 circuit shown. Such as figure 1 As shown, in order to ...

Claims

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