Microcom 334M, Operator'S Manual

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Chapter 3 Getting Started
334M Operator’s Manual - 880060-0110 3-4
3.2.2.1 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 9 to 25 Pin Cable
State
DE-9
Pin # Signals /
Directions
PC
DE-9
Pin #
State
DE-9
Pin # Signals /
Directions
PC
DB-25
Pin #
XX 1 DCD DCD 1 HI 1 DCD DCD 8
XX 2 TXD RXD 2 XX 2 TXD RXD 3
XX 3 RXD TXD 3 XX 3 RXD TXD 2
HI 4 DTR DSR 4 HI 4 DTR DSR 20
LO 5 GND GND 5 LO 5 GND GND 7
HI 6 DSR DTR 6 HI 6 DSR DTR 6
DC 7 RTS CTS 7 DC 7 RTS CTS 4
XX 8 CTS RTS 8 XX 8 CTS RTS 5
HI 9 +5V +5V 9 HI 9 +5V -
DC = DO NOT CARE XX = INDETERMINATE
Table 3-4 RS-232 Cable Configurations
3.2.3 USB Communication Interface
The 334M printer provides a single USB port for communication to a host device. In order
to communicate with the printer, the FTDI based USB driver must be installed on the host
computer. This may be downloaded at http://www.microcomcorp.com/drivers.htm. The
combined driver model (CDM) may be installed on XP, VISTA, Windows 7, Windows 8, and
Windows 10 allowing applications to access the FTDI devices as a virtual COM port.
3.2.3.1 USB Driver Setup
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 an
manual install is desired, follow the instructions below.
Run the CDM.exe driver to install the FTDI based USB.
CAUTION: Connection of a serial port to a parallel port may
result in damage to the printer and/or computer.