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Flashcards in Chapter 2 Deck (7)
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1

Purpose of the I/O Section

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

2

Two reasons for emplying optical isolation

Protects processor from input line voltage and electrical noise

3

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

Protect personnel, equipment, and product

4

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

True

5

E-stop refers to

Emergency Stop

6

Environmental considerations when installing PLC equipment

Dust
Heat
Humidity
Vibration

7

PLCs that take logner than ______ to scan are considered slow

50+ milliseconds