Two-Wire Sensors
By Terry Bartelt
In this animated object, learners examine the signals produced by sourcing and sinking two-wire sensors. A brief quiz completes the activity.
The Timer 3-Word Element
Learners study the descriptions of the three words in a PLC timer: EN, DN, and TT. They then test their knowledge in a brief quiz.
Absolute Optical Encoders
The operation and characteristics of an absolute optical encoder used in automation applications are presented.
Slow PLC Scan Time
In this animated object, learners study the problems that develop if the scan time of a PLC is too slow.
Labeling DC Motor Connections
Learners examine the connections of a DC motor and how the terminals are labeled. A matching exercise completes the learning object.
Analog Position Control (Screencast)
In this animated object, learners examine an analog closed-loop feedback system that uses potentiometers to control the position of a gear rack.
Linear Displacement Transducer
Learners examine how a linear displacement transducer is used to measure the linear position of a physical object. Animations show the sequential steps of the entire operation.
Motor Action (Screencast)
In this screencast, learners examine the interaction between a conductor that represents a motor armature and a magnetic field that represents a motor’s main field. This interaction causes the shaft to turn.
Motor Speed Control
Learners examine the speed control circuits in a DC variable speed drive that cause the RPM of a motor to vary. This activity has audio content.
RPM of AC Motors
By Terry Bartelt, Terry Fleischman
Learners study factors that affect the synchronous speed of an AC motor: the applied AC frequency and the number of stator poles.
PLC Output Modules
The learner will understand the operation and configuration of various types of PLC output modules and how they're used.
The LVDT: A Linear Voltage Differential Transformer in Action
In this animated object, learners study the operation of a linear voltage differential transformer. A brief quiz completes the activity.
Overflow and Underflow for Signed Binary Numbers
By John Casey, Terry Bartelt, Terry Fleischman
Learners examine the occurrence of overflow and underflow conditions in a programmable logic controller. It is recommended that users view the learning object “Signed Binary Numbers” in advance of this object.
PLC Timer Instructions
Learners examine the animated Timer-On Delay instruction and the Timer-Off Delay instruction of a PLC timer. A brief quiz completes the activity.
The LVDT DC Conversion Circuit
Learners study how a circuit converts the AC output of a linear voltage differential transformer (LVDT) into variable DC voltage. It is recommended that learners view the learning object IAU7807, “The LVDT: A Linear Voltage Differential Transformer in Action” before going through this object.
Four-Wire Sensors
In this animated object, learners examine the signals produced at the N.O. (normally open) and N.C. (normally closed) outputs of sourcing and sinking four-wire sensors. A brief quiz completes the activity.
Inductive Proximity Sensors (Screencast)
Learners examine the operation of an inductive proximity sensor in this animated object. A brief quiz completes the activity.
Incremental Encoder Quadrature Modes
Learners study the method of using more than one track and quadrature modes to improve the resolution of an optical encoder. A brief quiz completes the activity.
Hall-Effect Sensor Application
Learners view practical examples of how a Hall-effect sensor is used.
Basic DC Electrical Motor Construction
Learners examine the internal parts of a DC electrical motor and then text their knowledge in a drag-and-drop exercise.
Sinking/Sourcing Input Modules
Learners examine the conventional current flow at a PLC input module, along with the field devices connected to it. This interactive object includes quiz questions and feedback.
Series Motor Runaway (Screencast)
Learners consider the changes inside a series motor that could cause it to break apart if the load was disconnected. A quiz completes the activity.
Applying the Motor Voltage
In this animated lesson, learners examine the rectifier circuitry in a DC variable speed drive that supplies the voltages to the field coil and armature.
Feedback System Application
In this animated and interactive object, learners examine a heat exchanger as an example of an automated closed-loop system.
Motor Control Circuits
Learners examine an electric motor control circuit that uses a motor starter module. This activity has audio content.