By the end of this chapter, you will be able to: - confidently perform visual inspections of automation components and hardware - spot physical damage or deterioration by observing how the system functions - identify signs of wear, corrosion, or malfunction in automation equipment - assess whether components are fit for continued use or need maintenance
Mastering these skills helps you ensure reliable, safe operation of automated systems in real industrial environments.
Industrial automation is central to modern electronics engineering, especially in Kenya’s growing manufacturing and processing sectors. This chapter focuses on the installation of automation components and hardware, providing the foundational knowledge necessary for professionals to design, implement, and maintain automated systems. Understanding key terms, controllers, and control system concepts is essential for ensuring efficient and reliable automation solutions in industries such as food processing, pharmaceuticals, and assembly plants. Mastery of these concepts facilitates improved productivity, quality control, and safety in Kenyan industrial environments.
Automation involves a specialized vocabulary that electronics engineers must master to communicate effectively and implement systems correctly. Precise understanding of these terms is crucial when installing components or troubleshooting automation hardware. The following subtopics clarify essential terminology encountered in industrial automation.
Automation refers to the use of control systems, such as computers or robots, and information technologies to handle different processes and machinery in an industry without human intervention. It aims to increase efficiency, reduce errors, and improve safety by replacing or assisting manual operations. For example, automated packaging lines in Nairobi-based food processing factories reduce human error and increase throughput by controlling conveyor belts and sealing machines electronically.
An automation system typically comprises several key components that work together to perform tasks:
Understanding frequently used terms reduces miscommunication during installation and maintenance:
Clear understanding of terminology ensures correct interpretation of technical specifications, wiring diagrams, and programming instructions during installation. Misinterpretation can lead to improper component integration, causing system failures or safety hazards. For example, confusing “normally open” and “normally closed” contacts in relay wiring at a Nairobi hospital’s HVAC automation system could result in ventilation failure, compromising patient safety.
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Create a free accountThis chapter provides a comprehensive overview of installing automation components and hardware, beginning with the fundamental terms essential to understanding industrial automation. It explores controllers, including process modeling, transfer functions, and the distinctions between open loop and closed loop control systems. Various controller applications are examined, such as proportional, integral, and PID controllers, alongside feedback, feed forward, and cascade control strategies. The role of industrial computers is detailed through their hardware, software, memory management, signal conditioning, interfacing, networking, and integration with PLC, SCADA, and distributed control systems, including their configuration and applications. Programmable Logic Controllers are discussed in terms of hardware, architecture, input/output devices, number systems, and data handling, complemented by input and output processing techniques like signal conditioning and networked connections. The chapter further covers programming methods with ladder diagrams, function blocks, instruction lists, sequential function charts, and structured text, as well as internal relay operations, subroutines, interrupts, and data handling components such as timers, counters, and flip flops. It concludes with practical insights into automation components like encoders, resolvers, output devices, identification technologies including barcodes and RFID, power control devices, wiring practices, distribution blocks, transformers, power supplies, motor types, enclosures, insulation classes, and relevant IEE, OSHA, and NEMA regulations guiding safe and effective installation.
Type: Individual
| Tools & Equipment | Materials |
|---|---|
| Screwdriver set | PID controller unit |
| Multimeter | Proportional controller module |
| PC with controller configuration software | Integral controller module |
| Control panel enclosure 400mm x 300mm x 150mm | |
| 12V DC power supply unit | |
| Wiring cables 1.5 mm² | |
| Terminal blocks | |
| Cable ties | |
| Label tags |
| S/N | Item | Quantity |
|---|---|---|
| 1 | PID controller unit | 1 Pc per Candidate |
| 2 | Proportional controller module | 1 Pc per Candidate |
| 3 | Integral controller module | 1 Pc per Candidate |
| 4 | Control panel enclosure 400mm x 300mm x 150mm | 1 Pc per Candidate |
| 5 | 12V DC power supply unit | 1 Pc per Candidate |
| 6 | Wiring cables 1.5 mm² | 5 meters per Candidate |
| 7 | Terminal blocks | 10 Pcs per Candidate |
| 8 | Cable ties | 10 Pcs per Candidate |
| 9 | Label tags | 5 Pcs per Candidate |
| 10 | Screwdriver set | 1 Set per Candidate |
| 11 | Multimeter | 1 Pc per Candidate |
| 12 | PC with controller configuration software | 1 Pc per Candidate |
| Items to be Evaluated | Marks Available | Marks Obtained | Comments |
|---|---|---|---|
| TASK 1: Installation and wiring of controllers | |||
| Wore Personal Protective Equipment (dustcoat/overall, gloves) (Award 1 mark for correct PPE worn) | 1 | ||
| Applied good housekeeping during installation (Award 2 marks for neat and safe work area) | 2 | ||
| Identified and used correct tools and equipment (Award 2 marks for correct tool selection and use) | 2 | ||
| Mounted PID, proportional, and integral controllers securely inside the enclosure (Award 4 marks for proper fixing and alignment) | 4 | ||
| Connected 12V DC power supply correctly with polarity observed (Award 3 marks for correct wiring and secure connections) | 3 | ||
| Wired inputs and outputs according to the provided schematic with correct colour coding (Award 5 marks for correct wiring and adherence to colour code) | 5 | ||
| Labelled all wiring and components clearly for identification (Award 3 marks for clear and correct labelling) | 3 | ||
| Secured cables neatly using cable ties (Award 2 marks for neat cable management) | 2 | ||
| Sub-Total | 22 | ||
| TASK 2: Configuration and testing of controllers | |||
| Configured proportional controller settings as per process requirements (Award 3 marks for correct proportional gain setting) | 3 | ||
| Configured integral controller parameters correctly (Award 3 marks for accurate integral time settings) | 3 | ||
| Programmed PID controller with appropriate P, I, and D values (Award 5 marks for correct PID tuning and programming) | 5 | ||
| Tested controller operation and verified control response (Award 4 marks for successful functional testing) | 4 | ||
| Documented configuration parameters clearly (Award 3 marks for complete and accurate documentation) | 3 | ||
| Sub-Total | 18 | ||
| PRODUCT CHECKLIST | |||
| Finished installation matches schematic with controllers fixed and wired inside 400mm x 300mm x 150mm enclosure (Award 4 marks for correct physical installation and dimensions) | 4 | ||
| Wiring connections are correct, secure, and colour coded as per standard (Award 3 marks for correct and neat wiring) | 3 | ||
| Labels are clear, accurate, and properly fixed (Award 2 marks for proper labelling) | 2 | ||
| Controller configuration parameters correspond exactly to set proportional, integral, and PID values (Award 3 marks for correct configuration matching process requirements) | 3 | ||
| System operates correctly demonstrating stable liquid level control (Award 5 marks for functional performance) | 5 | ||
| Sub-Total | 17 | ||
| GRAND TOTAL | 57 | ||
Type: Individual
| Tools & Equipment | Materials |
|---|---|
| Screwdriver set | Programmable Logic Controller (PLC) unit |
| Wire stripper and cutter | DC power supply 24V |
| Multimeter | Stepper motor with encoder |
| Push button switch normally open | |
| Indicator lamp 24V | |
| Connecting wires, assorted colors | |
| Breadboard or control panel board | |
| Personal Protective Equipment (PPE) including dustcoat and insulated gloves |
| S/N | Item | Quantity |
|---|---|---|
| 1 | Programmable Logic Controller (PLC) unit | 1 Pc per Candidate |
| 2 | DC power supply 24V | 1 Pc per Candidate |
| 3 | Stepper motor with encoder | 1 Pc per Candidate |
| 4 | Push button switch normally open | 2 Pcs per Candidate |
| 5 | Indicator lamp 24V | 2 Pcs per Candidate |
| 6 | Connecting wires, assorted colors | 5 meters per Candidate |
| 7 | Breadboard or control panel board | 1 Pc per Candidate |
| 8 | Multimeter | 1 Pc per Candidate |
| 9 | Screwdriver set | 1 set per Candidate |
| 10 | Wire stripper and cutter | 1 Pc per Candidate |
| 11 | Personal Protective Equipment (PPE) including dustcoat and insulated gloves | 1 set per Candidate |
| Items to be Evaluated | Marks Available | Marks Obtained | Comments |
|---|---|---|---|
| TASK 1: Setup and wiring of open loop control system | |||
| Wore Personal Protective Equipment (dustcoat and insulated gloves) (Award 1 mark for correct PPE use) | 1 | ||
| Identified and used tools correctly (screwdriver, wire stripper, multimeter) (Award 1 mark each for correct tool use, max 2 marks) | 2 | ||
| Connected DC power supply to PLC and open loop circuit according to schematic (Award 1 mark for correct DC supply connection, 2 marks for correct wiring to PLC inputs and outputs) | 3 | ||
| Fixed components securely on the control panel board (Award 3 marks for proper fixing and neat layout) | 3 | ||
| Observed correct colour coding for wiring (Award 2 marks for adherence to standard colour codes) | 2 | ||
| Tested open loop system functionality with push button and indicator lamp (Award 4 marks for correct operation and response) | 4 | ||
| Drew block diagram of open loop control system showing PLC inputs and outputs (Award 2 marks for accuracy and completeness) | 2 | ||
| Sub-Total | 17 | ||
| TASK 2: Setup and wiring of closed loop control system | |||
| Wore Personal Protective Equipment (dustcoat and insulated gloves) (Award 1 mark for correct PPE use) | 1 | ||
| Identified and used tools correctly (screwdriver, wire stripper, multimeter) (Award 1 mark each for correct tool use, max 2 marks) | 2 | ||
| Connected DC power supply to PLC and closed loop circuit including stepper motor and encoder (Award 2 marks for correct DC supply connection, 2 marks for correct wiring to PLC inputs and outputs) | 4 | ||
| Fixed components securely on the control panel board (Award 3 marks for proper fixing and neat layout) | 3 | ||
| Observed correct colour coding for wiring (Award 2 marks for adherence to standard colour codes) | 2 | ||
| Programmed PLC for closed loop control using appropriate language (Award 5 marks for correct, efficient program with comments) | 5 | ||
| Tested closed loop system functionality confirming feedback from encoder controls the stepper motor (Award 6 marks for correct operation and response) | 6 | ||
| Sub-Total | 23 | ||
| PRODUCT CHECKLIST | |||
| Open loop control system assembled and wired as per schematic with correct dimensions 300mm x 200mm panel layout (Award 5 marks for accuracy of wiring and neatness matching dimensions) | 5 | ||
| Closed loop control system assembled and wired as per schematic with correct dimensions 300mm x 200mm panel layout (Award 5 marks for accuracy of wiring and neatness matching dimensions) | 5 | ||
| Functional testing confirms both systems operate correctly with no faults (Award 7 marks for successful operation and fault-free performance) | 7 | ||
| Labelling of components and wiring for clear identification (Award 3 marks for clear, correct labelling) | 3 | ||
| Sub-Total | 20 | ||
| GRAND TOTAL | 60 | ||
At the start of this chapter we promised you would be able to:
Tick each one you can genuinely do.
So, are you there yet?
You're competent when you can confidently do 50% or more of what this chapter promised.
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