Table 3-1 Rs-232 Cable Configurations; Rs-232 Serial Cables; Usb Communication Interface; Usb Driver Setup - Microcom 428T Operator's Manual

Chapter 3
3.3.1

RS-232 Serial Cables

The printer uses a standard through serial cable, typically referred to as a modem cable,
which may be purchased through Microcom Corporation or a local computer supply
company. A NULL-modem cable is not required because the printer is configured as DCE.
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 428T printer provides a single USB port for communication to a host device. In order to
communicate with the printer, the USB driver must be installed on the host computer. This
may be downloaded at http://www.microcomcorp.com/drivers.htm. The Windows combined
driver model (CDM) may be installed on XP, VISTA, Windows 7 or Windows 8 allowing
applications to access FTDI devices through either the D2XX DLL or a COM port without
having to change driver type. However, it should be noted that an application can only
communicate through one of these interfaces at a time and cannot send commands to the
D2XX DLL and the associated COM port at the same time.
3.4.1

USB Driver Setup

The Windows combined driver model (CDM) may be installed on XP, VISTA, Windows 7 or
Windows 8 allowing applications to access FTDI devices through either the D2XX DLL or a
COM port without having to change driver type. However, it should be noted that an
application can only communicate through one of these interfaces at a time and cannot
send commands to the D2XX DLL and the associated COM port at the same time.
428T Operator's Manual - 880037-0141
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