Appendix E: Board Layout - Black Box 2-Port RS-232/422/485 User Manual

2-PORT RS-232/422/485 PCI HOST ADAPTER

Appendix E: Board Layout

7201
C1
U1
GD75232
C2
J1
Port 1
HEADER24PINW
HEADER24PINW
C3 R4 R5 R8 R9
R3 R5 R7
J2
Port 2
GD75232
U2
HEADER24PINW
HEADER24PINW
32
• JxB JUMPER SETTINGS •
RS422 - REMOVE ALL JUMPERS
R1 RS485 - AT= AUTO ENABLE
RS485 - RT= RTS ENABLE
RS485 - NE= NO ECHO
R2
J1B J2B
C4
R8
E1
R16 R20 R24
R17 R21 R25
E2
R18 R22 R26
R10 R11
R12
J1A
R13
P P T L L
R14
J2A
P P T L L
R15
E3
U5
E4
• JxA JUMPER SETTINGS •
P= PULL UP/DOWN ENABLE
T= TERMINATION ENABLE
L= CONNECT RX TO TX
Figure E-1. Board layout.
U6
C5
XC9536-7201
Port 1
75174
U4
U7
16550 PLCC
C7
75175
U4
R27
R28
R19 R23
C8
93CS46
C6
C9
Y1
C10
R29
R30
J1C J2C
+
C11
Port 2
E5 E6
U9
16550 PLCC
R31
C15
• JxC - CLOCK DIV •
DIV1= DIVIDE BY 1
DIV2= DIVIDE BY 2
DIV4= DIVIDE BY 4
PCI9050
PORT1= J1x
PORT2= J2x
MADE IN USA
C16
U8
P1
C12
C13
C14
C17