Avid Technology Pro Tools SYNC HD - Bi-Phase;Tach Optocoupler Input

Chapter 8: Wiring Diagrams and Pin Assignments 73
Bi-phase/Tach OptoCoupler Input
Bi-phase/Tach
XREF=13
BIPHB
XREF=13
BIPHA
XREF=9
BIPHA_I
XREF=9
BIPHB_I
U5
3
2
5
7
6
XREF=9
OPTRETURN
R79
R77
U6
3
2
5
7
6
R49
C27
C25
R47
R46
5V
GND
6N137_DP
IC, OPTOCOUPLER
320003987
DIP8
+
EN
-
GND
8
VCC
GND
1K
1K
6N137_DP
IC, OPTOCOUPLER
320003987
DIP8
+
EN
-
GND
8
VCC
5V
1K
0.1UF
0.1UF
634
634
GND_C