Logic Drawing Symbols - ABB REL 301 Instruction Leaflet

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
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"
I.L. 40-386.4
=
A B
A
B
=
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