Digi EIA-232 Hardware Installation Manual

Pin Assignments

DB-25 and DB-9 Pin Assignments

Signal Description DB-25 Pin
GND Chassis Ground Shell
TxD Transmitted Data 2
RxD Received Data 3
RTS Request To Send 4
CTS Clear To Send 5
DSR Data Set Ready 6
SG Signal Ground 7
DCD Data Carrier Detect 8
DTR Data Terminal Ready 20
RI Ring Indicator 22

RJ-45 Pin Assignments for 10-Pin and 8-Pin RJ-45

Connectors

Signal Description Pin # (of 10) Pin # (of 8)
RI Ring Indicator 1
DSR Data Set Ready 2†
RTS Request To Send 3
GND Chassis Ground 4
TxD Transmitted Data 5
RxD Received Data 6
SG Signal Ground 7
CTS Clear To Send 8
DTR Data Terminal Ready 9
DCD Data Carrier Detect 10
† 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.
Refer to the Digi CD for more detailed cabling information or visit
http://support.digi.com for more information.
DB-9 Pin
Shell
3
2
7
8
6
5
1
4
9
N/A
1†
2
3
4
5
6
7
8
N/A
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© Digi International Inc., 2001, 2002, 2003 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
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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-
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of the publication.
91001071_B

Hardware Installation

Introduction
™
A Digi Neo adapter easily expands the number of EIA-232 ports
available on your computer, allowing you to cable additional peripheral
devices, such as modems, terminals or serial printers, directly to your
computer.
The Digi Neo 2 port adapter has two connectors (DB-9 or RJ-45) on the
adapter to provide peripheral port connections.
Digi Neo 4 and 8 port adapters are equipped with an HD-68 connector to
which a special Digi connector assembly is attached to provide the
peripheral port connections. There are seven different connector assem-
bly options available 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.
Digi Neo
PCI Host Adapters
EIA-232
Guide