Copyright © 2007, Infosystem Technology Corporation, Ltd.
40.
WM-112
Serial to Ethernet Module
WM-112
Serial to Ethernet Module
Appendix
A. Application Circuit
VC
C
RX
D
D_
RX
D
+
C6
47uF
/25V
R_
RX
D
R
S485/
R
S232
SELEC
C5
100nF
U
1
78
05
VI
N
1
VO
U
T
3
G N D
2
C_
RX
D
C_
R
TS
C_
TX
D
C_
C
TS
FB
2
BEAD
C1
5
0.
1uF
C1
4
0.
1u
F
C1
3
0.
1uF
C7
0.
1u
F
C4
0.
1uF
C2
0.
1u
F
+
C1
10
0uF
/1
0V
C3
100
nF
VC
C
J4
CO
N2
1
2
VC
C
J3
CO
N6
1
2
3
4
5
6
IO
0
IO
1
IO
3
IO
2
IO
4
D1
LED
_LI
N
K
D2
LED
_R
X
D3
LED
_T
X
D4
LED
_SY
S
R2
330
R3
33
0
R1
3
330
R1
4
330
LED
_R
X
LED
_T
X
LED
_LN
K
LED
_S
Y
S
VC
C
VC
C
FB
1
BEAD
J1
PLU
G POW
ER
1
2
M3
W
M
-112 M
odule
TP
R
X-
1
TP
R
X+
2
VC
C
3
LED
_LI
N
K
4
LED
_R
X
5
LED
_T
X
6
LED
_SY
S
7
GN
D
8
TP
TX
-
9
TP
TX
+
10
SH
IELD
11
IO
6
12
ISP/
SET
U
P
13
IO
5/
R
S485
14
/RS
T
15
IO
0
16
IO
1
17
IO
2
18
RX
D
19
TX
D
20
RT
S
21
CT
S
22
IO
3
23
IO
4
24
RX
+/D+
RX
-/D-
TX
+
TX
-
TP
R
X+
LED
_LN
K
LED
_T
X
LED
_R
X
LED
_SY
S
TP
TX
+
TP
TX
-
R4
75
R5
75
R6
75
IO
4
C1
1
10
00P/
2K
V
C1
6
100
0P/
2KV
RT
S
CT
S
IO
3
IO
2
IO
1
RX
D
TX
D
R
S48
5/
R
S2
32SEL
EC
IO
0
J5
RJ
45
TX
+
1
TX
-
2
RX
+
3
4
4
5
5
RX
-
6
7
7
8
8
TP
R
X-
FG
FG
VC
C
+
C8
10uF
S2
SW
P
B
ET
HE
RN
ET
P
OR
T
RS
-4
22
/4
85
P
OR
T
RS
-2
32
P
OR
T
+5
V
PO
WE
R
WM
-1
12
M
OD
UL
E
S1
SW
PB
U5
D
S75
176B
RO
1
RE
2
DE
3
DI
4
GN
D
5
DO
/R
I
6
DO
/R
I
7
VC
C
8
D_
R
XD
R1
10K
VC
C
TX
D
C1
7
0.
1u
F
P1
CO
NN
FL
E
X 4
1
2
3
4
/D
O
/RI
DO
/RI
U3
D
S75
176B
RO
1
RE
2
DE
3
DI
4
GN
D
5
DO
/R
I
6
DO
/R
I
7
VC
C
8
R1
1
10
K
VC
C
TX
D
VC
C
VC
C
C1
3
0.1uF
/DO
DO
J5
DB
9/M
A
IL
1
2
3
4
5
6
7
8
9
U2
0
M
AX
232
A/
SO
C1
+
1
C1
-
3
C2
+
4
C2
-
5
VC
C
16
GN
D
15
V+
2
V-
6
R1
O
UT
12
R2
O
UT
9
T1
IN
11
T2
IN
10
R1
IN
13
R2
IN
8
T1
O
U
T
14
T2
O
U
T
7
C9
0.1uF
C1
0
0.
1uF
C1
4
0.
1uF
C1
2
0.
1u
F
VC
C
R_
RX
D
CT
S
C_
RT
S
C_
TX
D
C_
C
TS
C_
R
XD
TX
D
RT
S
D6
1N
4001
D5
1N
40
01
U2
4
74
HC1
57
SEL
1
EN
15
VC
C
16
GN
D
8
1Y
4
2Y
7
3Y
9
4Y
12
1A
2
2A
5
3A
11
4A
14
1B
3
2B
6
3B
10
4B
13