Page 339 - Electronic Mechanic - TP - Volume - 2

ELECTRONICS MECHANIC - CITS

EXERCISE 225: Demonstrate various input and output
terminals of the drive unit, operator panel

and display unit

Objectives

At the end of this exercise you shall be able to:
• to demonstrate various Input and Output terminals of the drive unit
• to demonstrate operator panel
• to demonstrate Display unit.

Requirements

Tools/Equipments/Instruments
• Temperature sensor - 1 No.
• Push button - 1 No.
• Selector Switch - 1 No. Materials/Components
• Relay - 1 No. • Desktop/ Laptop (Latest specification) - 1 No.
• Encoder - 1 No. • Pointer - 1 No.
• Pressure transmitter - 1 No.

Procedure

1 Drive Unit:
The drive unit is a critical part of machinery and automation systems. It controls the motion of motors, servos,
or actuators.
The drive unit, often referred to as a Variable Frequency Drive (VFD), has several important

It is also known as a power train or propulsion system,
Terminals:
Input Terminals: These are typically labelled as R/L1, S/L2, and T/L3.
Output Terminals: These are usually labelled as U/T1, V/T2, and W/T3.
DC Bus Terminals: These are usually located between the input and output terminals and are labelled as

+ and -.”
2 Operator Panel:
An operator panel, also known as a Machine Operator’s Panel, is used to perform general machine operations.
It can be used for:

Moving axes manually in JOG mode.
Switching between operation modes.
Starting and stopping programs.
Adjusting the federate.

3 Display Unit:-
A display unit, often referred to as a Human Machine Interface (HMI), provides a visual representation of the
status of a control system with real-time data acquisition. It can also act as the centralized control unit for
manufacturing lines.
Display Units typically show:-
• Motor speed
• Current

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