Sample Configurations; Figure A-1. Middle-Of-The-Road Eia-232-D Configuration - Motorola MVME167-32 User Manual

EIA-232-D Interconnections
A

Sample Configurations

Figure A-1 is a good minimum configuration that almost always works. If the CTS and
DCD signals are not received from the modem, the jumpers can be moved to
artificially provide the needed signal.
6850
TXD
RXD
RTS
CTS
DCD
TXC
RXC
6850
TXD
RXD
RTS
CTS
DCD
TXC
RXC

Figure A-1. Middle-of-the-Road EIA-232-D Configuration

A-4
LS08
OPTIONAL
HARDWARE
TRANSPARENT
MODE
LS08
39kΩ
-12V
470Ω
+12V
39kΩ
-12V
-12V
39kΩ
-12V
+12V
470Ω 470Ω 470Ω
LOGIC
GND
+12V
470Ω
470Ω
+12V
39kΩ
MODULE
MVME167 Single Board Computer User's Manual
RXD
3
TXD
2
NC 1
CONNECTOR
TO
TERMINAL
CTS
5
DSR
6
DCD
8
SIG GND
7
CHASSIS GND
SIG GND
7
NC
1
DTR
20
TXD
2
RXD
3
CONNECTOR
TO
MODEM
OR
RTS
4
HOST
SYSTEM
CTS
5
DCD
6
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