Table 3-1 Rs-232 Cable Configurations - Microcom 438TM Operator's Manual

Chapter 3
For a 25-pin serial communication port – Use a 25-pin female to 9-pin male cable.
For a 9-pin serial communication port – Use a 9-pin female to 9-pin male cable.
9 to 9 Pin Cable
DE-9
State Pin # Directions
XX 1 DCD
XX 2 TXD
XX 3 RXD
HI 4 DTR
LO 5 GND
HI 6 DSR
DC 7 RTS
XX 8 CTS
HI 9 +5V
DC = DO NOT CARE
3.4 USB Communication Interface
The 438TM printer provides a single USB port for communication to a host device. In order
to communicate with the printer, the FTDI USB driver must be installed on the host
computer. This may be downloaded at http://www.microcomcorp.com/support/drivers/.
3.4.1 USB Driver Setup
The Windows FTDI USB Driver may be installed on XP, VISTA, Windows 7, Windows 8, or
Windows 10.
If there is an available Internet connection, Windows will silently connect to the Windows
Update website and install any suitable driver it finds for the device once connected. If a
manual install is desired, follow the instructions below.
Run the CDM.exe driver to install the FTDI based USB.
438TM Operator's Manual - 880049-0113
PC
Signals /
DE-9
Pin #
DCD 1
RXD 2
TXD 3
DSR 4
GND 5
DTR 6
CTS 7
RTS 8
+5V 9
Table 3-1 RS-232 Cable Configurations
9 to 25 Pin Cable
DE-9
State Pin #
HI 1 DCD
XX 2 TXD
XX 3 RXD
HI 4 DTR
LO 5 GND
HI 6 DSR
DC 7 RTS
XX 8 CTS
HI 9 +5V
XX = INDETERMINATE
Getting Started
PC
Signals /
DB-25
Directions
Pin #
DCD
RXD
TXD
DSR 20
GND
DTR
CTS
RTS
8
3
2
7
6
4
5
-
3-3