A SERVICE OF

logo

12
FOUR PORT RS-232 SERIAL INTERFACE
U6
R9
U5
U14U13
U12
U11
C9 C10
U17
C12
C11
U18
C15
C19
C13
C7
U10
C6
U9
PORT 1
C8
R3
R4
D3
SW3
C5
U8
E4
E5
12
4
M
S
N
M
S
N
R2
D2
C3
U15
+
C14
P1
C4
U7
P2
PORT 2
PORT 3
PORT 4
PORT 1
SW4
A9 A3ON=0
U4
PORT 1
PORT 2
PORT 3
U3
SW2
U2
PORT 4
SW1
U1
C1
C2
E3
PORT 2
E2
PORT 3
E1
PORT 4
R1
1
20
19
37
Y1
U16
P3
E
3.9"
8.66"
4.2"
2
3
4
5
6
7
10
11
12
15
2
3
4
5
6
7
10
11
12
15
2
3
4
5
6
7
10
11
12
15
2
3
4
5
6
7
10
11
12
15
R5
R6
D1
D4
R7
R8
3
Appendix A: Circuit-Board Design
= User
Configurable