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Basics of PLC Automation Systems
0/11
Course Guidelines
Introduction to Field Instruments in Industrial Automation
06:54
Control Room: Operator Interface Graphics
06:22
Introduction to 4-20 mA Analog Signals
06:44
Example of Level Measurement using 4–20 mA Signals to PLC
05:35
Practical Industrial Example of 4–20 mA Current Loop
08:02
The PLC Analog Input Signals
08:00
Pump Speed Control Example in PLC with 4–20 mA Signals
08:39
The PLC Analog Output Signals
04:21
Basic Questions on 4–20 mA Current
03:03
Basic Knowledge Quiz
00:10:00
Basic Concepts of PLC Analog Signals
0/6
Dead Zero Problem in Analog Signals
11:05
Live Zero Concept in 4–20 mA Signals
08:43
Bias in 4-20 mA Signal Range
03:22
Limitations of Early Transistors in Electronic Circuits
06:52
Review Question: Why 4 mA Is Used Instead of 0 mA?
01:28
4mA Quiz
00:10:00
History of Control Systems
0/9
Control Evolution: Pneumatic Control Systems for Beginners
05:45
Introductions to Analog Control Systems
09:11
Signal Conversion: I/P and P/I Converters
04:48
Pneumatic to Analog Instruments Transition
01:41
Historical Application Example 1
05:01
Historical Application Example 2
02:17
Historical Application Example 3
02:51
Historical Application Example 4
03:31
Control System History Quiz
00:10:00
Why is 4 mA Used as the Reference Standard?
0/4
Design Rules Behind 4 mA Selection
04:26
Reason for the 20% Bias Rule
01:19
Review Question: Why is 4 mA the industry standard instead of 6 mA or 10 mA?
01:56
Understanding Upper Range Value (URV)
01:28
Why 20 mA Is Selected for 4–20 mA Signals?
0/7
Human Safety Considerations
04:58
Review Question: Why 20 mA Instead of 30 mA?
01:40
Design Rules for Selecting 20 mA
04:37
The 1:5 Signal Ratio
06:45
Review Question: Why 20 mA? Why Not 25 mA or 15 mA?
02:13
Understanding Lower Range Value (LRV)
02:03
Quiz: 20 mA Concept
00:10:00
4-20 mA Analog Signals Standard
0/4
Current to Voltage Conversion Basics
03:41
Why Is a 4–20 mA Current Signal Converted to 1–5 V?
10:30
Review Question: Why the 4-20 mA Range Is Standard?
02:17
Quiz: 4–20 mA Standard
00:10:00
Key Facts
0/1
Prior to 4–20 mA Signals
05:12
Advantages of 4-20 mA Analog Signals
0/8
Fault Detection Capability
01:40
Reliable Long-Distance Signal Transmission
03:08
Simple and Cost-Effective Wiring
03:27
High Immunity to Noise and Interference
03:48
Support for Loop-Powered Field Devices
03:43
Easy Current-to-Voltage Conversion
01:09
Globally Accepted Industry Standard
02:50
Quiz: 4-20mA Advantages
00:10:00
Disadvantages of 4-20 mA Analog Signals
0/4
Magnetic Field Effects and Crosstalk Issues
06:14
Using Twisted-Pair Cables to Reduce Interference
04:44
Limited to Single Process Variable Measurement
02:37
Quiz: 4-20mA Disadvantages
00:10:00
Course Wrap-Up
0/1
Conclusion
01:05
PLC Automation Basics: 4-20 mA Analog Signals for Beginners

Understand how tank level measurement operates in PLC systems using sensors and 4–20 mA analog signals for beginners in automation and instrumentation.

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