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I.L. 40-386.3
AND
A
INPUTS
AND
B
SIGNAL ON ALL INPUTS REQUIRED TO PROVIDE AN OUTPUT
Notes: I – Active state of a signal (may be defined as positive or negative voltage or current)
0 – Inactive state of a signal (reference)
– Can have more than two (2) inputs
INCLUSIVE OR
A
INPUTS
OR
B
SIGNAL INPUT WILL PRODUCE AN OUTPUT
ALL INPUTS PRODUCE AN OUTPUT
NEGATION
(NOT)
INPUT
OR
INPUT
ABSENCE OF INPUT SIGNAL PRODUCES OUTPUT
TIMERS
INPUT
2-26
INPUTS
A
0
OUTPUT
0
I
I
INPUTS
A
0
0
OUTPUT
I
I
INPUTS OUTPUT
OUTPUT
OUTPUT
TP
OUTPUT
TD
Figure 2-5a. Logic Drawing Symbols
OUTPUT
ELECTROMECHANICAL
B
CONTACT EQUIVALENT
0
0
I
0
0
0
I
I
ELECTROMECHANICAL
OUTPUT
B
CONTACT EQUIVALENT
0
0
I
I
0
I
I
I
0
I
I
0
Input changes to Active State "1" -
Output changes to Active State After
Time Delay "On Pickup" (TP)
Input Changes to Inactive State "0"
(Only After Having Been Active) -
Output Changes to Inactive State After
Time Delay "On Dropout"
A
B
A
B
(10/94)
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