Intro to PLCs L8-14 (and more) Flashcards
1
Q
A shield/drain wire is typically connected at ____ end(s).
A
only one
2
Q
Typically, the secondary side of a control transformer is 115 volts AC, with X1 being ____ and X2 being the grounded line.
A
the hot-fused line
3
Q
A PLC is typically housed in a ____ enclosure.
A
metal
4
Q
A common problem with PLC enclosures is excessive ____.
A
heat
5
Q
PLC system maintenance is typically performed ____.
A
Annually
6
Q
T/F - It is possible for a PLC to have a different program in the processor than in the EEPROM chip.
A
True.
7
Q
Typically, enclosure cooling fans are replaced every ___ to ___ years.
A
3 to 5
8
Q
The error code 05 in some PLCs indicates that a ____.
A
module has been detected as being inserted under power
