Black Box PCW22A-R4, PCW22A-R3 manual Printed Circuit Board Layout, Printed Board Circuit Layout

CHAPTER 5: Conversions and Connections

			UNASSIGNED EBCDIC CODE
04	2B	46	58	71	8D	AB	B7	CE	ED
08	30	47	59	72	8E	AC	B8	CF	EF
09	31	48	62	73	8F	AE	B9	DA	FA
17	34	49	63	74	90	AF	BA	DB	FB
1A	38	51	64	75	9A	B0	BB	DC	FC
20	3B	52	65	76	9C	B1	BC	DD	FD
21	3E	53	66	77	9D	B2	BE	DE	FE
23	42	54	67	78	9E	B3	BF	DF	FF
24	43	55	68	80	9F	B4	CB	EA
28	44	56	69	8A	A0	B5	CC	EB
2A	45	57	70	8C	AA	B6	CD	EC

5.5 PRINTED CIRCUIT BOARD LAYOUT

P1

EARTH

SW4

RESET

OPT

GND

11VAC

C. T.

11VAC

DSR

PORT A

DB25

DCE-A

U27

DTE-A

U28

DTR A

U22

U23

CNT

CTS A

ON CNT

CARR B

ON

CAR B

ENB

CD

XTAL

U18

ON CNT

U19

A CARR

CNT

U16

U12

U9

64

R1

28

EPROM

U7

DSR B

U8

DSR A

TXD A

RXD A

RTS A

CTS A

DTR A

DSR A

CDA A

CDB

TXD B

RXD B

DTR			PORT B	DB25
	SME B	DCE-B	U29	DTE-B	U30
U24	SME B	EXT B	U25	EXT	U26	CNT ON	DTR B
		CTS CNT B	ON			8
U20	CAR A ENB		U21		ON	1	SW1
DETECT	CDB		U17			8	SW2
					ON	1
DETECT	CDA		U13			8	SW3
6264					ON	1
6116

RTS B CTS B DTR B DSR B TXC B RXC B PWR

Figure 5-2. Printed Board Circuit Layout.

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