First Set

Réussis tes devoirs et examens dès maintenant avec Quizwiz!

6

CPU

A typical PLC can be divided into three components consisting of the processor unit, the power supply, and the programming device.

False

2

Input

8

Power Supply

5

Programming Interface

Power Supply

The —— converts line voltage (220 or 110 Vrms) into the proper DC voltage required by the I/O modules.

Jumpers or DIP (Dual In-line Package)

——— switches are usec configure racks

13

Filter network

12

Full-wave rectifier

remote chassis

If a —— is used, it will need a powerful power supply.

AC Input modules and Analog Input Modules.

Other input modules would include

3

Output

10

Output Module

Uses ——- a High level, graphic programming language similar to relays and contactor logic.

RELAY LADDER LOGIC

1

Rails

14

Regulator

4

Rungs

Programming device

Used to enter desired program into memory. Computer is most common.

Brings down high ac (240V) down to a lower voltage

What does the step-down transformer do?

to decrease high voltage from transmission lines to low voltage

What is a step down transformer used for?

Fixed I/O PLC's

are self contained meaning that the power supply, processor, and I/O connections are all in the same unit.

Lack of ——— allows frequent changes through programming quickly without any new components.

hard wiring

7

memory

Module I/0 devices

must have a distinct address to be recognized by the processor.

Designed to operate in an industrial environment with Variations in

temperature, vibration, humidity

Modular I/O PLC's

—— are made up of a chassis to hold the modules.

I/O Modules

—— for the Lab PLC are mounted in a chassis assembly which provides communications with the processor and power to operate.

ON/OFF

•Input modules provide —— status of buttons, switches, or sensors to the PLC's processor

Input Section

Changes voltage or current signal into a logic-level signal normally 5 Vdc

Power supply

Converts 120 or 240 AC volts to voltage DC Can be a separate unit or embedded

To operate, the CPU "reads" input data from connected field devices through the use of its input interfaces, and then "executes" or performs the control program that has been stored in its memory system

Describe when an interface occurs.

9

Input Module

Processor unit is called

Microprocessor "brain"

(PLC) is a ———- system for control and operation of manufacturing equipment

Solid-state

11

Step Down Transformer

number of modules

The size of the power supply is dependent upon the ______ required for the job

Real world

The term ——— is used to distinguish actual devices that exist and must be physically wired from the internal functions of the PLC system that duplicate the function of relays, timers, counters, on, even though none physically exists.


Ensembles d'études connexes

Gero Exam 3 NCLEX 11,12,13,14,15,22

View Set

What are the disadvantages to classification?

View Set

Chapter 6 - Normal Probability Distributions

View Set

Chapter 4 Accounting for Merchandising Operations

View Set

Chapter 25: Mechanical Immobilization

View Set

Organophosphate Insecticides - Toxicology

View Set

Chapter 44: Osmoregulation and Excretion

View Set