A serial controller is any device that can send and receive ASCII code
via RS232 or RS422. You can connect a serial controller to either of the
two serial connectors on an enclosure’s CPU board. Connect serial
controllers with either standard RS232or RS422 connections (refer to the
following graphics for RS232 and RS422 cable connector pin mappings).
The pin diagram above allows for hardware flow control. If this type of
control is not needed, connect pin #7 to pin #8 on the PC’s connector.
5-2
Installation and Setup Guide
Attaching an External Controller
External
Control
RXD
TXD
TXD
RXD
GND
GND
RT
S
CTS
RT
S
CTS
DSR
DT
R
1
1
RS232 pin diagram
PC: DB9
AutoPatch: DB9
2
A
D
E F
3
5
RS232 pin diagram for a Macintosh computer
AutoPatch: DB9
Macintosh
Macintosh
AutoPatch: DB9
A&E..........................................5
D................................................3
F.................................................2
GND #5...................................GND #5
RXD #2....................................TXD #3
TXD #3.....................................RXD #2
RTS #7.....................................CTS #8
CTS #8.....................................RTS #7
DSR #6......DTR #4
PC: DB9
AutoPatch: DB9
