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+5V
C8
120pF
TP20
T POINT M2
R8
TX2
390
R10
TP21
T POINT M2
390
RX2
+5V
C64
1uF_3216
N-550B
+5VF2
R9
U7
1
8
N.C
Vcc
2
7
390
ANODE
ENABLE
3
6
CATHODE
Vout
4
5
N.C
GND
6N137
+5VF2
+5V
C9
120pF
U8
8
1
Vcc
N.C
7
2
R11
ENABLE
ANODE
6
3
Vout
CATHODE
5
4
GND
N.C
390
6N137
+12VF
U21
1
22
GND
NA
2
21
NA
NA
3
20
VIN
NA
4
19
NA
NA
5
18
NA
NA
6
17
NA
NA
7
16
NA
NA
8
15
NA
NA
9
14
0V
+V
10
13
NA
NA
11
12
-V
NA
NTV0512
Isolation DC/DC
LP1
800V Arrestor
TP56
1
T POINT M2
R12
3.9K
TP22
T POINT M2
C14
1uF
TX2F
RX2F
TX2F
TP23
T POINT M2
RX2F
U9
8
1
VIN
VOUT
7
2
GND
GND
6
3
GND
GND
C1
5
4
NC
NC
47pF
C63
LM78L05A/SOIC
47uF_16VEL
+5VF2
TP57
T POINT M2
+12VF
J5
2
1
4
3
6
5
8
7
10
9
C16
12
11
47pF
14
13
CON14A
MP506 Connector
C49
C50
10pF
10pF
+5VF2
C2
C62
47uF_16VEL
47pF
Technical Discussion
+5VF2
C15
C58
1uF
120pF
Figure 50: Main PCB Isolation
for MP-506 Schematic Diagram
119
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