1. (TCO 1) Which statement best defines PLCs?
2. (TCO 1) Which statement best defines an application for a PLC?
3. (TCO 1) From the table below, determine the pin numbers of a relay representing a NO contact.
Terminals
Resistance
(Relay Not Energized)
Resistance
(Relay Energized)
1 - 8
450 Ω
2 - 3
0 Ω
OVL (∞ Ω)
2 - 4
OVL (∞ Ω)
0 Ω
3 - 4
OVL (∞ Ω)
OVL (∞ Ω)
5 - 6
OVL (∞ Ω)
OVL (∞ Ω)
5 - 7
OVL (∞ Ω)
0 Ω
6 - 7
0 Ω
OVL (∞ Ω)
4. (TCO 1) Which statement is true for the relay logic diagram shown below?
5. (TCO 1) Which statement is true in the following relay logic diagram, if none of the pushbuttons have been pressed and none of the relay coils are energized?
6. (TCO 1) Which of the following could be a typical resistance value for the coil of a relay?
7. (TCO 1) Which statement is true in the circuit shown below?
1. (TCO 1) Name three special purpose modules used in a PLC
2. (TCO 1) List three typical modes of operation that can be selected by the key switch of a processor unit in a PLC.
3. (TCO 1) List three output devices
Comments
Content
1. (TCO 1) Which statement best defines PLCs?
2. (TCO 1) Which statement best defines an application for a PLC?
3. (TCO 1) From the table below, determine the pin numbers of a relay representing a NO contact.
Terminals
Resistance
(Relay Not Energized)
Resistance
(Relay Energized)
1 - 8
450 Ω
2 - 3
0 Ω
OVL (∞ Ω)
2 - 4
OVL (∞ Ω)
0 Ω
3 - 4
OVL (∞ Ω)
OVL (∞ Ω)
5 - 6
OVL (∞ Ω)
OVL (∞ Ω)
5 - 7
OVL (∞ Ω)
0 Ω
6 - 7
0 Ω
OVL (∞ Ω)
4. (TCO 1) Which statement is true for the relay logic diagram shown below?
5. (TCO 1) Which statement is true in the following relay logic diagram, if none of the pushbuttons have been pressed and none of the relay coils are energized?
6. (TCO 1) Which of the following could be a typical resistance value for the coil of a relay?
7. (TCO 1) Which statement is true in the circuit shown below?
1. (TCO 1) Name three special purpose modules used in a PLC
2. (TCO 1) List three typical modes of operation that can be selected by the key switch of a processor unit in a PLC.
3. (TCO 1) List three output devices