Learn 4-20 mA Analog Signals in PLC Systems for Beginners
What you'll learn
- Understand the fundamentals of analog signals.
- Basics of PLC Automation.
- Learn why 4 mA and 20 mA specific limits are chosen for analog signal ranges.
- Understand why 4-20 mA is used in electrical and instrumentation systems.
- Advantages and disadvantages of 4-20 mA current signals.
- Learn about industry standards and best practices
Requirements
- No prior experience in automation, electrical or instrumentation required.
- Basic understanding of industrial automation concepts is helpful but not necessary.
- Anyone interested in learning about 4-20 mA analog signal transmission in PLC.
Description
The 4-20mA current loop is the backbone of industrial automation and process control. From PLC (Programmable Logic Controller) systems to sensor-based instrumentation, 4-20mA signals play a vital role in transmitting accurate and noise-resistant data across long distances. But have you ever wondered why 4-20mA was chosen? Why not 0-10V, 0-20mA, or any other range?
This Electrical and Instrumentation Basic Course is designed to provide a deep understanding of the 4-20mA standard, explaining its origin, advantages, disadvantages, and why it dominates the industry today. This basic course helps engineers, technicians, students, or automation enthusiasts to learn the fundamentals of this essential 4-20 mA signal transmission method in PLC systems.
Why Learn About 4-20mA?
Industrial sensors, actuators, and controllers rely on accurate signal transmission to maintain precision and efficiency. The 4-20mA current loop ensures that data remains stable, interference-free, and consistent—even across long distances. Learning about this fundamental technology helps professionals troubleshoot, optimize, and design better control systems.
What You’ll Learn
Why 4-20mA?: The history and reasoning behind choosing 4-20mA over other signals.
Origins of 4-20 mA: Understand why 4 mA serves as the “live zero” and 20 mA is chosen as the upper limit.
Advantages & Disadvantages: Explore how 4-20 mA reduces noise interference, ensures reliable signal transmission, and why it sometimes needs extra components for voltage-based systems.
Why 4-20mA is used in PLCs?: How PLCs process analog input signals.
Practical Applications: See real-world examples of 4-20 mA in process control, industrial instrumentation, and sensor feedback loops.
Why It’s Widely Adopted: Discover how 4-20 mA maintains accuracy over long distances, powering many field devices without extra wiring.
Who Should Enroll
This course is perfect for beginners, professionals, engineering students, engineers & technicians, or anyone eager to learn the core principles of 4-20 mA in electrical and instrumentation systems.
By the end of this course, you’ll know exactly why 4-20 mA is central to industrial electronics and instrumentation engineering, and how to apply it in your own projects or career. Join us to unlock the secrets behind the most trusted current loop in the industry!
Who this course is for:
- Beginners learning 4-20 mA in electrical & instrumentation.
- PLC professionals enhancing analog signals knowledge.
- Engineering students exploring process control & automation.
- Technicians working with sensors & industrial signals.
- Anyone curious about why 4-20 mA is the industry standard.
Instructor
- 4.5 Instructor Rating
- 112 Reviews
- 2,335 Students
- 2 Courses
I am a highly experienced Instrumentation and Control Engineer with over 15 years of expertise in industrial automation, process control, and electrical systems. My technical proficiency spans DCS, PLC, SCADA, field instrumentation, control systems, and automation solutions across various industries.
I have a strong background in designing, implementing, and troubleshooting process instrumentation and related automation systems. With hands-on experience in commissioning, system integration, and industrial networking, I excel in optimizing automation processes for efficiency and reliability.
With a passion for teaching and sharing knowledge, I aim to make complex technical concepts accessible and practical for learners. My courses are designed to provide real-world insights and hands-on skills that professionals can immediately apply in their careers. Join me to enhance your expertise in instrumentation, control systems, and industrial automation, and take your skills to the next level!