PLSee Flashcards
Good reason PLC over relay
All of the above
What binary number would be show
0
What is switching medium between field and logic?
LASCR optical coupler
Two main sections of PLC memory
Executive
User
Two roles fulfilled by input module
Terminates input devices
Updates PLC with device status
Keep communication and power cables separate because
Prevent cross talk (noise)
Two conditions code allows in same raceway
Termination same box
Cable insulation same rating
Roles fulfilled by output module
Terminates output devices
Receives PLC commands
Device connected to MCR
Push button
Why we never repeat an output
Creates confusion in the program
Would it matter if entry/exit limits were wired normally open or closed
No, if they were opposite they would work the opposite counter
Discrete input
Prox switch
Discrete output
Mag starter
Pulse generator
Shaft encoder
Analogue input
0-10v