Multi-Channel Intrinsic Safety Barriers on Terminal Blocks
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Solution Overview
Problem
Conventional intrinsic safety barriers are often single-channel and general-purpose, leading to increased space occupation and costs in systems with multiple I/O channels, as they require separate cabinets and power supplies, and are not optimized for channel density.
Innovation Solution
Intrinsic safety barriers are designed to be mountable directly on terminal blocks of I/O modules, allowing for compact mounting, improved channel density, and reduced costs by using a combination of isolation modules and energy-limiting hardware that can handle multiple I/O channels, thereby eliminating the need for separate cabinets and power supplies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional single-channel intrinsic safety barriers are used for each I/O channel, then energy limiting and safety protection are ensured, but space occupation increases and channel density decreases
Solution Approach 1:
The patent combines multiple intrinsic safety barriers into a single multi-channel barrier device that can be mounted on a terminal block. This merging approach maintains the energy limiting and safety protection functions for multiple I/O channels simultaneously, eliminating the need for separate single-channel barriers for each channel, thereby reducing space occupation while preserving reliability.
Solution Approach 2:
The intrinsic safety barrier is designed with multi-functionality to handle multiple I/O channels through a single device. The barrier includes multiple limiter circuits that can process multiple data or power signals simultaneously, allowing one barrier to perform the safety protection function for several channels, thus improving channel density without compromising safety.
2Reliability
If separate cabinets and power supplies are used for each intrinsic safety barrier, then adequate power and protection are provided, but system complexity and costs increase
Solution Approach 1:
The patent merges multiple barrier functions into a single integrated device that includes its own power supply and mounting structure. This consolidation eliminates the need for separate cabinets and individual power supplies for each barrier, reducing system complexity and installation requirements while maintaining adequate power delivery and safety protection for all channels.
Solution Approach 2:
The multi-channel intrinsic safety barrier is designed as a universal device that can handle multiple I/O channels with a single power supply and control unit. This multi-functional design reduces the overall number of components needed in the system, simplifying installation and maintenance while ensuring reliable safety protection across all channels.
3Reliability
If conventional intrinsic safety barriers are used, then energy limiting is achieved, but channel density and system integration are reduced
Solution Approach 1:
The patent combines multiple energy limiting functions into a single multi-channel barrier device mounted on a terminal block. This merging allows multiple I/O channels to share one physical barrier unit, significantly improving channel density while maintaining effective energy limiting for each channel through dedicated limiter circuits within the integrated device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables efficient use of space, reduces costs, and supports high channel densities by allowing multiple intrinsic safety barriers to be mounted on terminal blocks, improving overall system efficiency and integration within industrial process control and automation systems.
Implementation Method 1
Each intrinsic safety barrier includes at least one limiter circuit configured to limit the amount of energy in the at least one data or power signal
Data Source
AI summary
A system includes a module having at least one input/output (I/O) channel. The system also includes a terminal block having terminals configured to provide electrical connections for the at least one I/O channel. The system further includes a barrier assembly having one or more intrinsic safety (IS) barriers. Each IS barrier is configured to receive at least one data or power signal, limit an amount of energy in the at least one data or power signal, and output the at least one energy-limited data or power signal. Each IS barrier includes at least one limiter circuit configured to limit the amount of energy in the at least one data or power signal. Each IS barrier is configured to be mounted on the terminal block. Each IS barrier could be configured to provide galvanic isolation between multiple devices or systems coupled to the IS barrier. Each limiter circuit could include a current limiter.