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CN3
TXD
RXD
CTS
DTR
RCH
MP-DTR
MP-TXD
RTS
FAULT
GND
GND
F-GND
MOUNT-HOLE
2
3
5
20
11
16
15
4
14
7
13
1
0
L5
L8
L4
L1
L9
DBLD-J255AF-21L91
B-01R × 9
L3
L7
L6
L2
R2
3.3K
D2
D1
R4
3.3K
DCB010
× 2
+ +
+
+
JP6
VCC
C4
0.1U
V+
C2
1U
50V
C6
1U
50V
3
2
16
14
13
8
7
1
11
12
9
10
4
5
6
15
D1O
R1I
R2I
D2O
C1+
D1I
R1O
R2O
D2I
C2+
C1–
V+
C2–
V–
IC1
GND
HD151232FP
C1
1U
50V
C5
1U
50V
V–
JP5
JP4
JP3
JP2
JP1
V+
TR2
C3875
TR4
A1179
R5
33K
VCC
R3
1K
TR3
FN1A4P
R1
10K
TR5
FA1A4P
TR1
FA1A4P
CN2
PSW
PEXT 1
PEXT 2
VEXT
VEXT
F-GND
MOUNT-HOLE
52065-6645
6
2
5
3
4
1
0
CN1
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
VVR
DIN1
DIN3
DIN5
DIN7
GND
VCC
/DIEN
GND
RXD
ID0
ID2
GND
PEXT 1
VEXT
VCC
GND
DIN2
DIN4
DIN6
DIN8
GND
VCC
/FAULT
DTR
GND
TXD
CTS
ID1
GND
PSWIN
PEXT 2
VEXT
VCC
PHEC40P-R111
DSW1
87654321
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
1
VCC
2
C3
220U
6.3V
+
VR1
EVN-D2A-10K
V–
VCC
VCC
3
1
5. RS232C Interface Board
5-1. Circuit Diagram