Rs-485 Serial Interface Circuit Board Diagram - Epson TM U200D - B/W Dot-matrix Printer Technical Manual

RS-485 Serial Interface Circuit Board Diagram

TO HOST
CN1
1 FG
FG
2
SD/SD1
3
RD/SD2
4
RS/RD1
5
/RD2
6
DR/INIT1
7
SG
8
/DR1
9
/DR2
10
/CS1
11
/CS2
12
13
14
15
16
17
18
19
20
ER
21
22
23
24
25
INIT2
0 FG
SHELL
Rev. B
R9
R13
CS1 CS1
R10
CS2 CS2
R8
DR2
DR1
R2
R6
RD1
R3
RD2
R1
SD2
SD1
R11 R4
SD2
SD1
RD2
RD1
SG SG
DR2
DR1
CS2
CS1
TP2
R12
+5V
U2
8 1
7 2 CTS
6 3 DR
5 4 SG
R5
+5V
CTS
U1
8 1
DR
7 2 RD
6 3 SD +5V
5 4 SG
SD
RD
SG
SG
+
TO MAIN BOARD
5
V
CN2
1
DK 1
2
DK S
3
PG
4
PG
5
+24V
6
+24V
7
PG
8
HOST_RTS
R17
CTS 9
CTS
SG 10
DET
11
RTS
R16
DR 12
CLKIN/DTR
SG 13
R18 CLKREQ
SG 14
SG
+5V 15
+5V
16
DK 2
17
DK G
C5 18
+
DK P
19
5
PG
20
V
+24V
21
+24V
TP1 22
PG
SG 23
SG
SD 24
SD
RD 25
RD
26
(RES)
27
#25_RESET
28
DSR_RESET
29
#RESET
SG 30
SG
R19
R14
R15
R7
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