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16
DUAL PORT RS-232422/485 SERIAL INTERFACE
RD1/
DSR1/
RI1/
RTS1/
E6
U8-15
U8-13
U8-11
U10-11
SHEET 2
E5
RS-232
RS-422
U9-5
U9-3
GND
SHEET 2
CTS1/
DCD1/
TD1/
DTR1/
SHEET 1
RD1
CTS1
DSR1
DCD1
E7
RS-422
U9-11
U9-13
GND
SHEET 2
SHEET 1
RD2
CTS2
DSR2
DCD2
RD2/
DSR2/
RI2/
RTS2/
R9
+12V
U8
MC145406
VEE+VDO
VEE-VSS
+5V
-12V GND
E8
RS-232
U11-15
U11-13
SHEET 2
CTS2/
DCD2/
TD2/
DTR2/
U11-11
U10-3
+12V
U11
MC145406
VEE+VDO
2
1
VEE-VSS
+5V
16
-12V GND
15
314
413
512
611
710
89
U11-15
SHEET 2
DTR2
SHEET 1
U11-13
SHEET 2
U11-11
SHEET 2
R8
-12V
12
RP2
8
7
RP2
6
5
RP2
4
3
RP2
1
2
RP4
1
2
RP4
1
4
RP4
1
5
RP4
1
7
RP3
1
7
RP3
1
4
RP3
1
3
RP3
1
8
+5V GND
RP1
5
1
+5V
RP1
3
1
U9-3
U9-5
SHEET 2
U9-11
U9-13
U9
+5V
VDO
VSS GND
75173
2
1
6
7
16
3
10 5
9
14
15
4
12
11
13
8
1A
1B
2A
2B
3A
3B
4A
4B
EN
EN
1Y
2Y
3Y
4Y
MC1489
U10
U13
+5V
VDO
VSS
GND
75174
2
3
6
5
16
1
10
7
11
14
13
4
12
9
15
8
1Y
1Z
2Y
2Z
3Y
3Z
4Y
4Z
EN1
EN2
1A
2A
3A
4A
GND
+5V
U10-3
U10-11
SHEET 2
SHEET 2
SHEET 1
SHEET 1
RI1
RI2
J1 5
GND1/
9
U7
RTS2
TD2
SHEET 1
8
74LS04
E4
R7
GND
A
B
C
1
3
5
2
4
6
GND
+5V
RP4
21
1
6
J2 5
GND2/
5
U7
6
74LS04
E3
R6
GND
A
B
C
1
3
5
2
4
6
GND
+5V
RP4
21
1
8
1
U7
2
74LS04
GND
3
U7
4
74LS04
11
U7
10
74LS04
13
U7
12
74LS04
SPARE GATES
J2
J2
J2
J2
2
6
9
7
J1
J1
J1
J1
8
1
3
4
J2
J2
J2
J2
8
1
3
4
2
6
9
7
J1
J1
J1
J1
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
2
3
4
5
6
7
1
8
15
14
13
12
11
10
16
9
SHEET 2
SHEET 1
SHEET 2
SHEET 1
SHEET 2
SHEET 1
U8-15
TD1
U8-13
RTS1
U8-11
DTR1
14
2
1
5
4
9
10
12
13
7
3
6
8
11
OUTA
OUTB
OUTC
OUTD
V+
ENA
INA
ENB
INB
ENC
INC
END
IND
GND