user manual

Levels of Implementation
A-5
A
Figure A-1. Middle-of-the-Road EIA-232-D Configuration
3
TXD
RXD
RTS
CTS
DCD
TXC
RXC
-12V
TXD
RXD
RTS
CTS
DCD
TXC
RXC
OPTIONAL
HARDWARE
TRANSPARENT
MODE
LOGIC
470Ω
39kΩ
39kΩ
39kΩ
470Ω
39kΩ
-12V
2
1
5
6
8
7
7
1
20
2
3
4
5
6
CHASSIS GND
CONNECTOR
TO
TERMINAL
CONNECTOR
TO
MODEM
OR
HOST
SYSTEM
RXD
TXD
NC
CTS
DSR
DCD
SIG GND
DTR
TXD
RXD
RTS
CTS
DCD
-12V
+12V
-12V
+12V
+12V
GND
+12V
SIG GND
NC
cb181 9210
470Ω
6850
6850
LS08
LS08
470Ω 470Ω 470Ω
MODULE