Chapter 4. WIRING
NOTE
RS-232C connector signals (9 pins)
Example : IBM and compatibles
■
Connection to ST221
HANDLING PRECAUTIONS
• Attach 1/2W or greater terminating resistances of 150
Ω
±5% at each end of
the communications lines.
• The DCP551 operates as a master station when connected to an ST221 dur-
ing communications.
$ $ $ $! $"
5/
! " #
56 ,-#,+2
Pin No.
1
2
DCD
RxD
Name
¬
¬
3
TxD
®
4
DTR
®
5
GND
6
DSR
¬
7
RTS
®
8
CTS
¬
Signal direction
Host Instrument
4-17