Intermec EasyCoder 501 XP & 601 XP – Service Manual
158
Chapter 16 Interfaces
Schematics 2
16.6 Double Serial
Interface Board, cont.
IORD
IOWR
A4
A3
A2
D7
D6
D5
D4
D3
D2
D1
D0
RS422 driver non-isolated
-RXD
+RXD
-TXD
+TXD
-20M2
+20M2
-20M1
+20M1
RI
+5V
DSR
GND
TxD
RxD
RTS
CTS
DTR
+RS422I
-RS422I
-RS422O
+RS422O
SHIELD 422
RS232 driver
S6
S5
STRAPPING INFORMATION
CONFIGURATION
S5 RS422 NONISOLATED
S6 20mA CURRENT LOOP
20 mA CL: IC13, IC14, S6
RS232: IC11, NO STRAPS
RS422 non-isol: IC12, S5
VCC
GND
GND
GND
VCC
GND
VCC
GND
NC
NC
NC
NC
RI
RCLK
BAUDOUT
XOUT
XIN
MR
ADS
A2
A1
A0
DDIS
RXRDY
TXRDY
OUT2
OUT1
CS2
CS1
WR
RD
DCD
DSR
CTS
SIN
SOUT
RTS
DTR
INTR
CS0
WR
RD
D7
D6
D5
D4
D3
D2
D1
D0
CGND
GND
VCC
A
B
Y
A
B
Y
A
B
Y
A
B
Y
VCC
C
A
C
A
GND
VCC
RO
DI
GND
DO-
DO+
RI-
RI+
VCC
GND
C1+
C1-
C2+
C2-
V+
V-
T1IN
T2IN
T3IN
T4IN
T1OUT
T2OUT
T3OUT
T4OUT
R1IN
R2IN
R3IN
R4IN
R1OUT
R2OUT
R3OUT
R4OUT
V24
V24
2
3
4
5
6
7
8
9
24
20
14
33
37
36
13
11
40
41
42
25
21
15
16
38
35
27
32
26
31
30
29
28
39
18
19
17
10
43
1
12
23
34
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
2
3
8
7
6
5
2
3
8
7
6
5
5
6
4
2
3
1
8
9
10
11
12
13
2
3
45
6
7
8
1
10
12
13
14
11
15
5
18
19
21
2
1
24
20
7
3
23
16
6
4
22
17
2
1
1
2
3
4
>=1
>=1
>=1
>=1
F34
RP2
F20
F15
F16
F17
F18
F19
F22
F21
R20
R21
C18
C19
C17
C16
16550
IC10
R24
R25
F26
F27
F24
F25
F23
P4
F28
F29
F30
F31
F32
F33
6N139
IC13
6N139
IC14
R35
R31
R34
D2
R32
R33
74HC02
IC15B
74HC02
IC15A
74HC02
IC15C
74HC02
IC15D
R30
Z2
R28
R29
Z1
R27
R26
OBUS
R
TCS3
INT3
R
ESET
CLK8
DS8921
IC12
MAX238
IC11
R22
R23
74HC04
IC7A
JP3
V24
1-971613-25 Double Serial Interface pcb.