N

NC
Not connected; designates unassigned connections in connection diagrams.

NC machinery
Numerically Controlled machinery; their movements are programmed.

NPN input/output
Transistor input/output circuit implemented with an npn transistor, and thus negative switching.

NV memory
Non-volatile; electronic non-volatile memory for electronic counters for value retention in case supply voltage is interrupted.

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z