Digi Neo Manual

91001071 Rev A
Pin Assignments
DB-25 and DB-9 Pin Assignments
RJ-45 Pin Assignments for 10-Pin and 8-Pin RJ-45
Connectors
Refer to the Access Resource CD for more detailed cabling information.
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Digi International in the United States and other countries. All other brand and product
names are trademarks of their respective holders.
© Digi International Inc., 2001 All Rights Reserved; www.digi.com
Information in this document is subject to change without notice and does not represent a
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Digi provides this document “as is,” without warranty of any kind, either expressed or
implied, including, but not limited to, the implied warranties of fitness or merchantability
for a particular purpose. Digi may make improvements and/or changes in this manual or in
the product(s) and/or the program(s) described in this manual at any time.
This product could include technical inaccuracies or typographical errors. Changes are peri-
odically made to the information herein; these changes may be incorporated in new editions
of the publication.
Digi Neo
PCI Host Adapters
EIA-232
Hardware Installation
Guide
Introduction
ADigiNeo
™adapter easily expands the number of EIA-232 ports avail-
able on your computer, allowing you to cable additional peripheral
devices, such as modems, terminals or serial printers, directly to your
computer.
Digi Neo adapters are equipped with an HD-68 connector to which a spe-
cial Digi connector assembly is attached to provide the peripheral port
connections. There are seven different connector assembly options avail-
able to use with Digi Neo 4 and Neo 8 adapters:
• RJ-45 Connector Box
• DB-25 Connector Box (male connectors)
• DB-9 Connector Box (male connectors)
• DB-25 Fan-out Cable (male or female connectors)
• DB-9 Fan-out Cable (male or female connectors)
This installation guide describes how to plan your setup and install a Digi
Neo adapter.
Signal Description DB-25 Pin DB-9 Pin
GND Chassis Ground Shell Shell
TxD Transmitted Data 2 3
RxD Received Data 3 2
RTS Request To Send 4 7
CTS Clear To Send 5 8
DSR Data Set Ready 6 6
SG Signal Ground 7 5
DCD Data Carrier Detect 8 1
DTR Data Terminal Ready 20 4
RI Ring Indicator 22 9
Signal Description Pin # (of 10) Pin # (of 8)
RI Ring Indicator 1N/A
DSR Data Set Ready 2† 1†
RTS Request To Send 3 2
GND Chassis Ground 43
TxD Transmitted Data 54
RxD Received Data 65
SG Signal Ground 76
CTS Clear To Send 8 7
DTR Data Terminal Ready 9 8
DCD Data Carrier Detect 10 N/A
† DSR (Pin 2 on a 10 pin connector, Pin 1 on an 8 pin
connector) can be swapped with DCD by using the ALTPIN
configuration option. ALTPIN reverses the position of these two
signals in 10 pin connectors and allows DCD to be used instead
of DSR on an 8 pin connector.
Consult the driver documentation for how to do this in your
specific operating system.

Step One: Plan Your Setup
A Digi Neo adapter can be set up in a variety of ways. Before you start
your installation, consider the following:
Number of Components. You can connect up to four peripheral devices to
a Digi Neo 4, and eight peripheral devices to a Digi Neo 8 adapter.
Construction of Cables. To achieve the greatest reliability over distance,
cables should be:
• Shielded, low capacitance, and preferably designed specifically
for serial data transmission.
• Grounded at both ends of the cable.
• Routed away from noise sources such as generators, motors and
fluorescent lights.
Cable Connections. Before beginning the installation, verify that you have
the appropriate Digi connector assemblies (fan-out cables or connec-
tor box assemblies). Fan-out cables are complete in themselves; con-
nector box assemblies include an interconnect cable to connect the
box to the adapter. Fan-out cable and connector box options are
described in detail in a separate Cable Usage Guide, packaged with
your adapter.
You will also need a cable for each peripheral that you will be attach-
ing to the connector assembly. The connector type that you need at
either end of the peripheral cable depends on the type of Digi connec-
tor assembly that you use and the connector on the peripheral.
Digi connector assemblies are available with RJ-45, DB-25 or DB-9
connectors. You will need to be sure that you have cables of the cor-
rect length and with the right connectors to properly attach the
devices you want to use.
Additional information about the Digi Neo adapter, such as specifications
and cabling details, is provided on the Access Resource CD which is
packaged with the adapter.
Step Two: Install the Neo Adapter
CAUTION! To guard against damage to the adapter due to electrostatic
discharge (ESD), do not remove the adapter from its protective packag-
ing until you have grounded yourself to the computer chassis (see step 4,
below).
1. Shut down your computer in the manner recommended for your oper-
ating system.
2. Unplug power from the computer.
3. Remove the computer’s cover.
4. Touch the computer chassis to equalize any static potential between
yourself and the computer. This will help prevent damage to the
adapter due to electrostatic discharge.
5. Locate an available PCI slot in your computer and remove the slot
plate.
6. Remove the adapter from its protective packaging.
7. Write down the serial number of the adapter in the space provided
below.
8. Insert the adapter into the slot and screw the endplate to the computer
chassis. The endplate must be screwed into the computer chassis to
remain in compliance with Part 15 of FCC rules.
9. Replace the computer’s cover.
10. Attach the peripheral interconnect cable(s) to the adapter.
CAUTION: Many SCSI adapters use the same HD-68 connector type as
the Neo adapter. Do not plug SCSI devices into the Digi connector, and
do not plug Digi peripheral cables into SCSI adapters.
Serial Number: ________________________
Step Three: Install Peripheral Cabling
You can connect modems, terminals, serial printers, or any other standard
EIA-232 device to a Digi Neo adapter using a cable between the periph-
eral and the Digi connector assembly.
On the peripheral end of the cable, the connector you must have depends
on the requirements of the peripheral. The Digi end of the cable must be
equipped with the connector type that mates with the connectors on the
Digi connector assembly.