Digital quantity input module having multi state checking function

Abstract

The invention discloses a digital quantity input module of multi-state test function which is an electronic product, in particularly a device for testing the collected digital input signal of the state of a switch of an external electronic device. The invention is composed of a 16-ch digital input module, a PPS control circuit, a NPS control circuit, a CPU and a CAN driving circuit, wherein the 16-ch digital input module, after being converted and insolated, is connected to an IO pin of the CPU, the PPS control circuit and the NPS control circuit. The CUP outputs two control signals which arerespectively a PULS1 and a PULS0 to control the PPS control circuit and the NPS control circuit respectively. The digital quantity data sampled by the CPU is transmitted to other intelligent devices through a CAN bus. The CPU adopts a MC68K singlechip. The invention has the characteristics of novel structure, simplicity and practicability, accurate detection, multiple functions, etc., hence an economical and practical digital quantity input module.

Description

technical field [0001] The digital quantity input module with multi-state inspection function described in the present invention is an electronic product. Specifically, it is a device for detecting digital input signals collected from the switch state of an external electrical appliance. Background technique [0002] Currently, the digital input module can only check whether the digital signal is high (+24V) or low (0V), but cannot check whether the input is floating. The mechanical vibration on the train is relatively severe. If the input signal line of the DI module is loose during operation, the input signal line is in a suspended state. The traditional digital input module cannot judge this fault and will input wrong data, which may cause misoperation. . In addition, the input signal of the traditional digital input module is always on, which will cause a certain amount of energy consumption and increase the heat of the circuit board, resulting in unstable operation of...

AI Technical Summary

Problems solved by technology

[0002] At present, the digital input module can only check whether the digital signal is high (+24V) or low (0V), but not whether the input is floating

The mechanical vibration on the train is relatively severe. If the input signal line of the DI module is loose during operation, the input signal line is in a suspended state. The traditional digital input module cannot judge this fault and will input wrong data, which may cause misoperation.

In addition, the input signal of the traditional digital input module is always on, which will cause a certain amount of energy consumption, and increase the heat of the circuit board, resulting in unstable circuit operation, which seriously affects the control accuracy

Images