Programmable Input Module for Simplified Industrial Control
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Summary
Problems
Industrial control systems require multiple dedicated input/output modules to interface with instruments operating at different voltage levels, leading to increased complexity and cost, as existing modules are often specific to particular voltage ranges and types, such as 24V, 48V, 120V, or 240V AC/DC.
Innovation solutions
A programmable discrete input/output module that includes a pulse width modulation/demodulation module, isolator, comparators, and digital filter, allowing for programmable references and hysteresis, and providing galvanic isolation, enabling operation across various voltage levels and types, thus replacing multiple modules with a single versatile unit.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If multiple dedicated input/output modules are used to interface with instruments at different voltage levels, then the system can handle diverse voltage requirements, but the system complexity and cost increase
Why choose this principle:
The patent implements a universal input module that can interface with instruments operating at different voltage levels (AC and DC) using a single standardized module design. The module incorporates voltage detection circuitry that automatically identifies the input voltage type and configures appropriate processing, eliminating the need for multiple dedicated modules for different voltage requirements.
Principle concept:
If multiple dedicated input/output modules are used to interface with instruments at different voltage levels, then the system can handle diverse voltage requirements, but the system complexity and cost increase
Why choose this principle:
The input module employs dynamic configuration capabilities where the module automatically adjusts its operating parameters based on the detected voltage type and level. The system transitions between different operational modes (AC mode, DC mode, different voltage levels) dynamically, allowing a single module to adapt to diverse voltage requirements without manual reconfiguration or hardware changes.
Application Domain
Data Source
AI summary:
A programmable discrete input/output module that includes a pulse width modulation/demodulation module, isolator, comparators, and digital filter, allowing for programmable references and hysteresis, and providing galvanic isolation, enabling operation across various voltage levels and types, thus replacing multiple modules with a single versatile unit.
Abstract
A programmable discrete input module is described. In one or more implementations, the programmable discrete input module comprises a pulse width modulation module configured to generate a pulse width modulated signal based upon an input signal and a pulse width demodulation module configured to generate a demodulated pulse width signal. An isolator is configured to isolate the pulse width modulation module and the pulse width demodulation module and to generate isolated modulated pulse width signal based upon the pulse width modulated signal for the pulse width demodulation module to generate the demodulated pulse width signal. The programmable discrete input module also includes a first comparator and a second comparator for comparing the demodulated pulse width signal with a respective programmable reference and a digital filter configured to filter a comparison signal output by the first comparator or the second comparator to generate a discrete input signal.