3G5A2-RPT01-E datasheet(16/182 Pages) OMRON

16 / 182 page

1-2-1 Input Devices

PCs can receive inputs from either automated or manual devices. The PC could

receive data from the user via a pushbutton switch, keyboard, or similar device.

Automated inputs could come from a variety of devices: micro-switches, timers,

encoders, photoelectric sensors, and so on. Some devices, like the limit switch

shown below, turn ON or OFF when the equipment actually makes contact with

them. Other devices, like the photoelectric sensor and proximity sensor shown

below, use other means, such as light or inductance, in order to get information

about the equipment being monitored.

Photoelectric Sensor

Limit Switch

Proximity Sensor

1-2-2 Output Devices

A PC can output to a myriad of devices for use in automated control. Almost any-

thing that you can think of could be controlled by a PC. Some of the most com-

mon devices are motors, solenoids, servomotors, stepping motors, valves,

switches, indicator lights, buzzers, and alarms. Some of these output devices,

such as the motors, solenoids, servomotors, stepping motors, and valves, affect

the controlled system directly. Others, such as the indicator lights, buzzers, and

alarms, provide outputs to notify personnel operating or monitoring the system.

Solenoid

Servomotor

Stepping Motor

The Role of the PC

Section 1-2

3G5A2-RPT01-E Datasheet(PDF) 16 Page - Omron Electronics LLC