Motorola MVME187 Installation Manual page 161

SERIAL PORT
TXD
RXD
RTS
CTS
OPTIONAL
HARDWARE
DCD
TRANSPARENT
MODE
TXC
RXC
SERIAL PORT
TXD
RXD
39kΩ
-12V
RTS
470Ω
+12V
CTS
39kΩ
-12V
DCD
TXC
RXC
Figure E-1. Middle-of-the-Road EIA-232-D Configuration
1488
39kΩ
-12V
+12V
LS08
470Ω
LOGIC
LS08
GND
+12V
470Ω
1488
1489A
1488
1489A
470Ω
+12V
1489A
39kΩ
-12V
Levels of Implementation
RXD
3
1489A
TXD
2
NC 1
470Ω 470Ω
CTS
5
DSR
6
DCD
8
SIG GND
7
CHASSIS GND
SIG GND
7
NC
1
DTR
20
TXD
2
RXD
3
RTS
4
CTS
5
DCD
6
cb181 9210
E
CONNECTOR
TO
TERMINAL
CONNECTOR
TO
MODEM
OR
HOST SYSTEM
E-5