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DCS I/O Technology Innovation: How Remote General-Purpose I/O Systems Address the Challenges of “Overcrowded Cabinets” and “Delivery Anxiety” in Petrochemical Plants

In the era of industrial automation, where systems are becoming larger and more intelligent, the I/O modules in Distributed Control Systems (DCS) — which act as the “nervous system” linking the field to the control center — are facing unprecedented challenges. The expansion of plant size leads to a dramatic increase in signal points, while […]

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Working Principle of Signal Generators

A signal generator is a device used to provide various electrical signal excitations for electronic devices or systems. It can output signals such as voltage, current, resistance, and thermocouple, among others. These generators are widely used in fields like electronics engineering, industrial automation, and scientific research. Below is a detailed introduction: 1. Key Features 1.1

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How to Calibrate Flow Meters On-Site Using Portable Standard Devices

Introduction Flow meters used in trade settlements must be regularly calibrated to ensure accurate readings. While factory calibration ensures the accuracy of a flow meter, installation-related issues can still affect its performance once the meter is set up on-site. On-site calibration, using portable standard devices, is a more reliable method to guarantee accuracy in real-world

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The Broad Applications of Temperature Transmitters

Temperature management plays a crucial role in various industries, ensuring equipment operates optimally and efficiently. In environments such as data centers, the role of temperature transmitters becomes indispensable. Let’s explore how these devices contribute to industrial and operational efficiency across diverse applications. Addressing Thermal Challenges in Data Centers Large corporations and telecommunications operators often maintain

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Core Components of Sensors and Their Relationship with Automation Instruments

Introduction In industrial automation, smart devices, and measurement & control systems, sensors serve as the key bridge connecting the “physical world” with the “digital system.” As the critical component interacting directly with the object being measured, the sensor’s performance determines the accuracy of subsequent signal processing and control decisions. Definition, Role, and Core Concept Definition

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Why PID Controllers Remain Dominant in Industrial Control

Despite being considered “low-tech” or overly simple by some engineers, the dominance of PID (Proportional-Integral-Derivative) controllers in the industrial control domain remains unchallenged. There are several reasons for this enduring supremacy, which are outlined below: 1. Simple yet Effective PID controllers are based on a simple mathematical model, making them easy to understand and implement.

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Why -90kPa Negative Pressure Can’t Be Measured? The Issue May Not Be with the Instrument

When selecting pressure transmitters, terms like “absolute pressure” and “gauge pressure” often cause confusion. A user once requested a pressure transmitter with a measurement range of 0~-90kPa absolute pressure, but was told that only a gauge pressure transmitter could be used. Why is that? 1. Absolute vs. Gauge Pressure: Understanding the Difference A user wanted

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Can DI and DO Signals Share a Common Cable in SIS Systems?

In the design and installation of Safety Instrumented Systems (SIS), one seemingly “convenient” practice—routing Digital Input (DI) and Digital Output (DO) signals through the same multi-core cable—may present serious risks. Did you know that this wiring method is not only discouraged, but also prohibited in many high-reliability environments? In this article, we will explore the

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Why Setting a 90° Angle for a Butterfly Valve’s Rotary Stroke Can Lead to Errors

In industrial automation, the coordination between the valve stroke and positioner is critical for accurate control. Although butterfly valves inherently have a 90° rotational stroke, setting this value to 90° in some positioners can lead to mismatches and errors. This article explores why this happens and how to address the issue. Understanding the Feedback Mechanism

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