Chapter 2 Flashcards

1
Q

Purpose of the I/O Section

A

Ability to change virtually any type of voltage or current signal into a logic-level signal that is compatible with the processor

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2
Q

Two reasons for emplying optical isolation

A

Protects processor from input line voltage and electrical noise

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3
Q

Why is a hard-wired emergency stop circuit recommended for PLC installations

A

Protect personnel, equipment, and product

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4
Q

I/O modules are not keyed to prevent unauthorized personnel from removing them from the I/O rack

A

True

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5
Q

E-stop refers to

A

Emergency Stop

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6
Q

Environmental considerations when installing PLC equipment

A

Dust
Heat
Humidity
Vibration

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7
Q

PLCs that take logner than ______ to scan are considered slow

A

50+ milliseconds

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