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24 Device Description
WAGO I/O System 750
750-637 Incremental Encoder Interfaces
Manual
Version 1.6.1
Public
Table 12: Legend for the “Display Elements” Figure, Version 750-637/000-001
Designation
LED
State
Function
A
A, left
Off
−30
V < (U(A)
–
U(/A)) < −15
V
Green
30
V < (U(A)
– U
(/A)) < 15
V or both
inputs open
B
C, left
Off
−30
V < (U(C)
–
U(/C)) < −15
V
Green
30
V < (U(C)
– U
(/C)) < 15
V or both
inputs open
C
B, left
Off
−30
V < (U(B)
–
U(/B)) < −15
V
Green
30
V < (
U(B) – U
(/B)) < 15
V or both
inputs open
Latch
D, left
Off
Input = 0 V or open
Green
Input = 24 V
Gate
A, right
Off
Input = 0 V or open
Green
Input = 24 V
Ref
C, right
Off
Input = 0 V or open
Green
Input = 24 V
N1
B, right
Off
Output = 0 V
Green
Output = 24 V
N2
D, right
Off
Output = 0 V
Green
Output = 24 V
Table 13: Legend for the “Display Elements” Figure, Versions 750-637/000-002 and 750-637/000-
004
Designation
LED
State
Function
A
A, left
Off
0
V < (U(A) < 5
V or input open
Green
30 V > (U(B) > 15 V
B
C, left
Off
0
V < (U(C) < 5
V or input open
Green
30 V > (U(A) > 15 V
C
B, left
Off
0
V < (U(B) < 5
V or input open
Green
30 V > (U(C) > 15 V
Latch
D, left
Off
Input = 0 V or open
Green
Input = 24 V
Gate
A, right
Off
Input = 0 V or open
Green
Input = 24 V
Ref
C, right
Off
Input = 0 V or open
Green
Input = 24 V
N1
B, right
Off
Output = 0 V
Green
Output = 24 V
N2
D, right
Off
Output = 0 V
Green
Output = 24 V