Uart1:" Interface Circuits - Intermec EasyCoder 501 Service Manual

17.6:9 "uart1:" Interface Circuits

/TXD
/RTS
RESET
/CTS
/DSR
P202
232
CL
/RXD
422
UNUSED CIRCUITS
IC08C & F
5 6
13 12
74AC14M
GND
IC512C, D
9
8
&
10
12
11
&
13
74HC08M
GND
IC03B
4
6
1
5
74HC32M
GND
IC204C, E
5 6
1
11 10
1
7406M
GND
Intermec EasyCoder 501 – Service Manual Ed. 7
IC200
C200
+
1
+
CEXT
3
–
C201
20
+
+
CEXT
18
–
/TXD 11
/RTS 13
RESET 15
/RXDRS 16
/CTS 14
1
/DSR 12
MC145407
V24 R202
GND R203
IC19E
11 10
1
74HC04M
V24
IC02D
GND
13
11
&
12
74HC08M
IC204A
R206
2
1
1
7406M
IC206
8
6
IC19A
1 2 5
1
R215 7
6N139
74HC04M
P205
R208
GND
R207
IC207
P204
8
RI+
2 7
RO RI–
3 6
DI DO+
5
DO–
DS8921
C209
17
+10V
+
C202
4
–10V
+
GND
10 TXD
8 RTS
6 DTR
5 RXD
7 CTS
9 DSR
D200
+5.3V
+
C203
GND
Z200
R204
Z201
R205
IC205
8
2
6
3
5
6N139 7
R209
R211
2
D201
3
P208 P209
Chapter 17 CPU Board
P200
1
2
3
F200
F201
F202
P203
F203
F204
F205
F206
GND
F207
F208
F210
F212
F213
F214
F215
F216
F217
F218
F219
P206
R216
R217
P207
GND
C205 – C208
GND
P201
1
DTR 20
TXD 2
RTS 4
RXD 3
CTS 5
DCR 6
+5VEXT 16
GNDI 7
+20M1 9
–20M1 10
+20M2 13
–20M2 14
+TXD 11
–TXD 12
+RXD 18
–RXD 25
+RS422I 15
22
–RS422I 17
24
+RS422O 19
8
–RS422O 21
23
P201
26
27
GNDC
141