Black Box IC181C Appendix A Circuit-Board Design, FOUR PORT RS-232 SERIAL INTERFACE, 8.66, 10 4

FOUR PORT RS-232 SERIAL INTERFACE

Appendix A: Circuit-Board Design

3.9"

P2

C1		PORT
U1		4
	R1	SW1
	R5
	R6
	D1
	E1
2				2
3				3
4			PORT	4
7				7
5				5
6				6

104 10

1111

1212

1515

C4

U7

PORT 4

U2

E2

PORT 3

R2 SW2

M

S

N

3 4

D2E5

C3

R9

PORT 3

C5 U5

U8

PORT 3

C2		PORT
U3		2
	R3		SW3
M S N		1 2
				E3
	D3	2
U6		3
		4
		5
		6
		7
		10
		11
		12
		15

C6

U9

PORT 2

U4	PORT	ON=0
	1
		A9
		A3 E

		R4		SW4
		D4
		R7
		R8
		E4
	2
	3
PORT	4		PORT
	7
	5
	6
2	10		1
	11
	12
	15			C7
	U10
					PORT 1

8.66"

P1

C14

+

1

20

C8 C9 C10

U12

U13U14

C12

U11

C11

U18

U15	U16	U17
	P3		C15
			19
			37

Y1

C13

C19

=User Configurable

4.2"

12