Motor Control Circuits, Logic Circuits and PLCs Homework Assignment

NOCTI

A _______ is a device that consists of two back-toback diodes with a gate.

transistor

A PLC is a device that was invented to replace _______ for machine control.

sequential relay circuits

When more tahn on start station is used, the start buttons should be connected

in parallel

The most economical type of starter is a/an

manual across the line

Three major compents of a PLC are

CPU, memory, and I/O modules

When a relay is connected so that it continues to energize itself after a momentary input is removed, the circuit is called a _______ circuit.

seal-in

A _______ is an electromagnetic device in a low-voltage system used for remote or automatic control.

relay

Which of the following is a factor that must be considered when selecting overcurrent protection devices for a motor control circuit?

rated full load current of the motor

A motor jog button normally has _______contacts.

4

To test a relay coil out-of-circuit, measure the

capacitance

Multiple stop switches are wired in

series