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3.2 Types of Output To a PLC
Digital Output
Digital output (DO)are for the ON/OFFin your control scheme. Some
examples are motors that need just be ON or OFF, Lighting, solenoid
valves, door locks.
Analog Output
Analog output (AO)are for variable level or range of output between OFF
or stopped and ON or full speed as for an electric motor for instance.
Examplesof analog outputs are a VFD (VariableFrequency Drive), a valve
position actuator, and an industrial variable power supply.
3.2.1 Output device
• Valves • Stack lights
• Actuator • Control relays
• Motor • Pumps
• Lamp • Printers
• Horns andalarms • Fans
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