Digi Edgeport/1i, Edgeport/2i, Edgeport/4s MEI, Edgeport/2s MEI, Edgeport/4s DC Isolated Installation Manual

Edgeport®

USB Expansion Modules-Industrial

Installation Guide

Revision history—90000409

Revision Date Description

G March, 2009 No changes to the document.

H April, 2009 Added RoHS compliance information for China.

J June, 2009 Updated the product CD.

K December, 2017 Updated branding and made editorial enhancements.

Trademarks and copyright

Digi, Digi International, and the Digi logo are trademarks or registered trademarks in the United
States and other countries worldwide. All other trademarks mentioned in this document are the
property of their respective owners.

© 2017 Digi International Inc. All rights reserved.

Disclaimers

Information in this document is subject to change without notice and does not represent a
commitment on the part of Digi International. Digi provides this document “as is,” without warranty of
any kind, 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.

Warranty

To view product warranty information, go to the following website:

www.digi.com/howtobuy/terms

Send comments

Documentation feedback: To provide feedback on this document, send your comments to

[e-mail].

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Digi Technical Support: Digi offers multiple technical support plans and service packages to help our

customers get the most out of their Digi product. For information on Technical Support plans and
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Edgeport Industrial Installation Guide

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Contents

USB Expansion Modules-Industrial

Edgeport/1i

Cabling Edgeport 6

USB connection 6
RS-422/485 serial connection 6
Jumper wire based mode configuration 7

Edgeport/2i

Cabling Edgeport 8

USB connection 8
RS-422/RS-485 serial connection 8

Cable connections (DB9 female) for full duplex 8

Cable connections (DB9 female) for half duplex 9
Configuring the DIP switches 9

Two-position switch 9

Eight-position switch 9

Edgeport/2s MEI, Edgeport/4s MEI, Edgeport/4s Isolated, Edgeport/8s
MEI

Cabling Edgeport 11

USB connection 11
Cable connections (DB9 female) for full duplex 11
Cable connections (DB9 Female) for half duplex 12
DB9 RS-232 pin assignment 12
Configuring the port flags 13

Edgeport mounting diagrams

For all Edgeports except the Edgeport/1i 14

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Edgeport driver installation

Edgeport configuration utility

General tab 16
Information tab 17
Configuration tab 18
Port Flag Configuration tab 19
Confidence Test tab 22
Power Management tab 23
Port Status tab 24
Version tab 25
Advanced tab 26

Edgeport system status light

For all Edgeports except the Edgeport/1i 28

Understanding hubs

Regulatory information

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USB Expansion Modules-Industrial

This manual covers the following models:

n Edgeport/1i

n Edgeport/2i

n Edgeport/2s MEI

n Edgeport/4s MEI

n Edgeport/4s DC Isolated

n Edgeport/8s MEI

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Edgeport/1i

Edgeport® USB-to-Serial Converters from Digi International provide high-speed serial connectivity via
USB port expansion for Windows-based applications. Edgeport/1i provides one RS-422/485 serial DB-9
port. For more detailed information, as well as the latest manual and technical updates, visit

www.digi.com/support/Edgeport.

Cabling Edgeport

USB connection

Type A

Plug the Type A (flat) end of the USB cable into the USB port located in the back of your PC or into an
available USB port on a standard hub or into a Digi International Hubport. Plug the Type B (square)
end of the USB cable into the Edgeport.

RS-422/485 serial connection

The Edgeport/1i supports RS-422/RS-485 protocol. To configure the features of RS-422/485
communication on the Edgeport/1i, you will short or leave certain pins unconnected at the DB9
connector of the cable. See the following pin assignment tables:

Cable connections (DB9 female) for full duplex

Pin Signal Description

3 ▶ TA
7 ▶ TB

8 ▶ RA
4 ▶ RB

(T-)
(T+)

(R-)
(R+)

transmit data negative
transmit data positive

receive data negative
receive data positive

Type B

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Edgeport/1i Jumper wire based mode configuration

Pin Signal Description

5 ▶ signal ground

2 ▶ no connect

Cable connections (DB9 female) for half duplex

Pin Signal Description

3 ▶ TA
7 ▶ TB

8 ▶ RA
4 ▶ RB

5 ▶

1 ▶

2 no connect

Note Short pin 1 to pin 5 (GND).

(T-)
(T+)

(R-)
(R+)

transmit data negative
transmit data positive

receive data negative

receive data positive

signal ground

full and half duplex

Jumper wire based mode configuration

For "jumper wire" based mode configuration, use the following pins:

Pin Description

1 ▶ full and half duplex

6 ▶ echo on and off

The user can switch on and off the following features:

n Line termination (120 ohm): To enable the line termination resistor, connect pin 9 to pin 8. To

disable line termination, leave pin 9 unconnected.

n Full Duplex and Half Duplex: For Full Duplex operation, leave pin 1 unconnected. For Half

Duplex operation, short pin 1 to pin 5 (GND) at the cable connector.

n Echo On and Echo Off: For Echo On mode, leave pin 6 unconnected. For Echo Off mode, short

pin 6 to pin 5 (GND) at the cable connector.

If the drivers are not already installed, see Edgeport driver installation.

Edgeport Industrial Installation Guide

9 ▶ line termination

7

Edgeport/2i

Edgeport USB-to-Serial Converters from Digi International provide high-speed serial connectivity via
USB port expansion for Windows-based applications. Edgeport/2i provides a combination of up to two
RS-422 and/or RS-485 serial DB-9 ports. For more detailed information, as well as the latest manual
and technical updates, visit www.digi.com/support/Edgeport.

Cabling Edgeport

USB connection

Type A

Plug the Type A (flat) end of the USB cable into the USB port located in the back of your PC or into an
available USB port on a standard hub or into a Digi International Hubport. Plug the Type B (square)
end of the USB cable into the Edgeport.

RS-422/RS-485 serial connection

Cable connections (DB9 female) for full duplex

Pin Signal Description

3 ▶ TA
7 ▶ TB

8 ▶ RA
4 ▶ RB

5 ▶ signal ground

1, 2, 6, 9 no connect

(T-)
(T+)

(R-)
(R+)

transmit data negative
transmit data positive

receive data negative
receive data positive

Type B

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Edgeport/2i Configuring the DIP switches

Note For full duplex (in the above diagram) the differential pair TA and TB should be together in one

twisted pair and RA and RB should be together in another twisted pair.

Cable connections (DB9 female) for half duplex

Pin Signal Description

3 ▶ TA
7 ▶ TB

8 ▶ RA
4 ▶ RB

5 ▶ signal ground

1, 2, 6,
9

Note Half duplex contains only one twisted pair.

(T-)
(T+)

(R-)
(R+)

transmit data negative
transmit data positive

receive data negative

receive data positive

no connect

Configuring the DIP switches

Two-position switch

The two-position DIP switch, located on the back panel, connects the signal ground to chassis ground.
IMPORTANT: Do not connect signal ground to chassis ground on more than one location in order to
prevent ground loops and potentially high currents.

Eight-position switch

The Edgeport/2i also has two sets of eight position DIP switches, located on the back panel next to
their corresponding serial port.

The following figure shows what each switch selects in the ON and OFF positions.

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Edgeport/2i Configuring the DIP switches

Consult the diagrams in the following figure for various configuration options.

If the drivers are not already installed, see Edgeport driver installation.

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Edgeport/2s MEI, Edgeport/4s MEI, Edgeport/4s
Isolated, Edgeport/8s MEI

Edgeport USB-to-Serial Converters from Digi International provide high-speed serial connectivity via
USB port expansion for Windows-based applications. Edgeport/2s MEI, Edgeport/4s MEI and
Edgeport/8s MEI provide a combination of up to two, four or eight (respectively) RS-232 and/or RS-422
and/or RS-485 serial DB-9 ports. For more detailed information, as well as the latest manual and
technical updates, visit www.digi.com/support/Edgeport.

The Isolated version has 2KV DC isolation between all of its ports including the serial ports and the
USB port.

Cabling Edgeport

USB connection

Type A

Plug the Type A (flat) end of the USB cable into the USB port located in the back of your PC or into an
available USB port on a standard hub or into a Digi International Hubport. Plug the Type B (square)
end of the USB cable into the Edgeport.

Cable connections (DB9 female) for full duplex

Pin Signal Descriptionk

3 ▶ TA
7 ▶ TB

8 ▶ RA
4 ▶ RB

5 ▶ signal ground

1, 2, 6, 9 no connect

(T-)
(T+)

(R-)
(R+)

transmit data negative
transmit data positive

receive data negative
receive data positive

Type B

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Edgeport/2s MEI, Edgeport/4s MEI, Edgeport/4s Isolated,
Edgeport/8s MEI

Note For full duplex (in the above diagram) the differential pair TA and TB should be together in one

twisted pair and RA and RB should be together in another twisted pair.

Cable connections (DB9 Female) for half

Cable connections (DB9 Female) for half duplex

Pin Signal Description

duplex

3 ▶ TA
7 ▶ TB

8 ▶ RA
4 ▶ RB

5 ▶ signal ground

1, 2, 6, 9 no connect

Note Half duplex contains only one twisted pair.

(T-)
(T+)

(R-)
(R+)

transmit data negative
transmit data positive

receive data negative

receive data positive

DB9 RS-232 pin assignment

Pin Description

1 ▶ DCD data carrier detect

2 ▶ RD receive data

3 ▶ TD transmit data

Edgeport Industrial Installation Guide

4 ▶ DTR data terminal ready

5 ▶ SGND ground

6 ▶ DSR data set ready

7 ▶ RTS request to send

8 ▶ CTS clear to send

9 ▶ RI ring indicator

12

Configuring the port flags

The Edgeport/2s MEI, Edgeport/4s MEI, Edgeport/8s MEI and the Edgeport/4s Isolated, which support
RS-232, RS-422 and RS-485, are configured using the Edgeport configuration utility, available from the
Edgeport driver package. Before configuring, make sure that the drivers have been installed and that
the device is connected to your computer.

If the drivers are not already installed, see Edgeport driver installation.

Open the Edgeport configuration utility. Select the Edgeport that you want to configure, and click on
the Port Flag Configuration button. The drop-down boxes under the Industrial Settings allow you to
select from the following options for each port listed:

n RS-232

n RS-422: No Terminating Resistor

n RS-422: Terminating Resistor

n RS-485: Half Duplex, End Unit, Echo

n RS-485: Half Duplex, End Unit, No Echo

n RS-485: Half Duplex, Middle Unit, Echo

n RS-485: Half Duplex, Middle Unit, No Echo

Configuring the port flags

n RS-485: Full Duplex, End Unit, Master RS-485: Full Duplex, End Unit, Slave

n RS-485: Full Duplex, Middle Unit, Master

n RS-485: Full Duplex, Middle Unit, Slave

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Edgeport mounting diagrams For all Edgeports except the Edgeport/1i

Edgeport mounting diagrams

For all Edgeports except the Edgeport/1i

Under-shelf mounting bracket

1

Nuts, bolts, and screws are not included.

Rack mount kit

1

1

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Edgeport driver installation

Edgeport driver installation

The following instructions apply to Windows XP, Server 2003 (R2), Server 2008 (R2), Windows 7,
Windows 8, Windows Server 2012 (R2), Windows 10 and Windows Server 2016.

Note Please go to www.digi.com to download software for older operating systems.

You must be logged into an account with administrator privileges before proceeding.

1. Make sure the Edgeport device is not connected to the computer.

2. If you have installed a previous Edgeport driver, use the Edgeport configuration utility that

came with your driver package to uninstall the driver:

a. Click the Uninstall button from the Advanced tab.

b. Reboot the computer when prompted.

3. Download the most current Edgeport drivers from the Digi website:

a. Navigate to www.digi.com using a web browser.

b. Select Support Tools from the Support menu.

c. Under the Support Downloads menu, select Drivers.

d. Select Edgeport USB from the list.

e. Select the appropriate Windows Operating System from the dropbox.

f. The driver download link will appear underneath the OS dropbox. Save this .exe file

somewhere convenient such as your desktop.

4. Install the Edgeport driver:

a. Log into Windows with the administrator user account, or another account with

administrative privileges.

b. Run the downloaded .exe file and wait until the installation is complete.

c. Connect the Edgeport to the computer with a USB cable. Or, if the Edgeport is

already connected to the computer via USB, unplug and plug it in again.

d. The Edgeport drivers will automatically install.

Your new COM port(s) are ready and are numbered sequentially following the existing ports in your
system. You can now run the Edgeport configuration utility, described in the next section.

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Edgeport configuration utility

The following instructions apply to all Windows operating systems.

The Edgeport configuration utility program allows you to manage the serial ports of your Edgeport
product. The Edgeport configuration utility is available from the computer Start menu after you install
the Edgeport drivers.

Follow these steps to access the configuration utility:

1. Download the Edgeport drivers, following the instructions in Edgeport driver installation.

2. Once the drivers are installed, launch the Edgeport configuration utility from the Digi USB

program group on the computer's Start menu.

General tab

The General tab in this utility allows you to perform tasks such as configuring the device's COM ports,
setting port flags and testing the ports. See the subsections that follow for additional details.

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Information tab

The Information tab allows you to review the manufacturing information pertaining to your device.

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Configuration tab

The Configuration tab allows you to reassign the physical port on your device to any available
Windows COM port number from 1 to 255 and give your device a user friendly device name. This
capability is particularly helpful if you have more than one device.

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Port Flag Configuration tab

The Port Flag Configuration tab allows you to configure performance options and special
functionality on a per-port basis.

n Low Latency (930-based Edgeport only):

Normally the UART will interrupt when the receiver has been idle for four character
times; for example 4ms at 9600). As long as data is being received, UART continues to
buffer them until its internal FIFO is full (~56 bytes). This flag causes the Edgeport to
poll the RX FIFO for received bytes. If any bytes are available they will be sent to the
driver without any delay.

n Remap Baud:

Setting the baud rate to 1200 baud will result in 230400 baud.

n Ignore Flush:

If an application sends IRP_MJ_FLUSH_BUFFERS it will be ignored. The following is an
excerpt from Microsoft documentation:

Drivers of devices with internal caches for data and drivers that maintain internal buffers
for data must handle this request.

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Edgeport configuration utility Port Flag Configuration tab

n When Sent:

Receipt of a flush request indicates that the driver should flush the
device's cache or its internal buffer, or, possibly, should discard the data
in its internal buffer.

n Operation:

The driver transfers any data currently cached in the device or held in the
driver's internal buffer(s) before completing the flush request. The driver
of an input-only device that buffers data internally might simply discard
the currently buffered device data before completing the flush IRP,
depending on the nature of its device.

n Fast Writes:

When an application sends a write to the driver, by default the Edgeport driver will wait
until all data has been transmitted out of the Edgeport device before completing the
write. When the Fast Writes flag is set, we complete the write even if data is still
buffered in the driver and the Edgeport device.

n Fast Reads:

This flag is used when an application requires that a read complete immediately. In the
read immediate case, the Edgeport driver will send a request to the Edgeport device
asking for any buffered data to be sent up. This buffered data will be included when the
read completes. If this flag is set, the driver will not query the Edgeport device for
additional data.

n Disable Plug & Play:

Do not let the serial port enumerator detect devices plugged into the Edgeport.

n Ignore Tx Purge:

The IOCTL_SERIAL_PURGE request cancels the specified requests and deletes data
from the specified buffers. The purge request can be used to cancel all read requests
and write requests and to delete all data from the read buffer and the write buffer.

When the Ignore Tx Purge flag is set, the SERIAL_PURGE_TXCLEAR command will be
ignored. The function will not purge the write buffer.

n Timer Logic: (Windows 9x only)

If the application uses PortSetReadCallBack(), the notification routine will only be called
when the number of bytes in the receive buffer is greater then the RX trigger. The
Microsoft serial VxD also implements a timer that will trigger and call the notification
routine if some amount of data is available in the RX buffer but no new data has been
received for ~200ms (receiver is no longer active).

We do not enable this behavior by default because of the nature of Edgeport buffering.
But if you set the flag we will complete the read when we detect ~200 ms no activity.

The code specifies that if the receiver is active, the read will not be completed.

The problem is that the Edgeport buffers the RX bytes and we poll the driver. If we do

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Edgeport configuration utility Port Flag Configuration tab

not receive any bytes in 200ms we may report an erroneous event even if there are
available bytes in the Edgeport device or driver.

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Edgeport configuration utility Confidence Test tab

Confidence Test tab

The Confidence Test tab allows you to perform a confidence test on the internal workings of the
serial ports.

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Edgeport configuration utility Power Management tab

Power Management tab

The Power Management tab allows you to turn the power on and off for select model Hubports with
USB PlusPower ports.

Note This applies to Compact (/c) or PCI card PlusPower Hubport models. This feature does not

toggle the 5 V standard USB port. It only applies to the 12 V and 24 V USB ports.

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Edgeport configuration utility Port Status tab

Port Status tab

The Port Status tab provides the status of a selected (highlighted) serial port.

The Poll Interval is the number of seconds between updates of this window. This is also the number of
seconds between each entry in the log file.

To create a log file, click the Start Logging button and enter a filename for the log file. This file will
contain all of the information displayed in the Port Status window until the Stop Logging button is
clicked.

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Edgeport configuration utility Version tab

Version tab

The Version tab allows you to review the file information pertaining to the software.

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Edgeport configuration utility Advanced tab

Advanced tab

The Advanced tab allows you to do several advanced tasks. See the subsections that follow for more
detailed information.

n Uninstall - Uninstall the drivers.

Note You must reboot the computer after uninstalling drivers.

n Enable Event Logging – Place event messages in system event log.

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Edgeport configuration utility Advanced tab

n COM Port Assignment - Configure how COM ports will be assigned.

l Assign COM ports based on converter serial number.

This is the default setting. In this mode, the driver uses the serial number of each converter

to uniquely identify it, and the COM port assignments for a given converter are based on its

serial number. No matter which physical USB port a converter is plugged into, it will

maintain its assigned COM port numbers.

l Assign COM ports based on physical USB port.

In this mode, the driver identifies a converter based on the physical USB port it is plugged

into. This effectively assigns COM port numbers to physical USB ports. No matter which

converter is plugged into a given USB port, it will use the COM port numbers assigned to

that USB port. This permits a converter to be to be replaced with a new unit, and, although

the new unit has a different serial number, it will receive the same COM port assignments

as the old unit because they were both plugged into the same USB port.

When using this mode, converters are identified not by their serial number, but by a 2-7

digit number that identifies which USB port it is plugged into.

When the COM ports are assigned, click OK. You must reboot the computer before the change takes
effect.

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Edgeport system status light For all Edgeports except the Edgeport/1i

Edgeport system status light

For all Edgeports except the Edgeport/1i

The functionality of the system status light is as follows for current "TI-based" Edgeport products,
with the exception of the Edgeport 1, which does not have LED indicators.

Off - No light indicates that the Edgeport driver is not properly installed.

Red - This light may flash briefly during installation.

Orange - Blinking orange indicates Edgeport serial port activity. This light may also flash briefly during

installation.

Green - Blinking green indicates that the Edgeport driver is properly installed and operating normally,
and the unit is idle, ready for use.

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Understanding hubs

Understanding hubs

Hubs, which are critical components in the USB architecture, are wiring concentrators that enable the
attachment of multiple devices, thus converting a single attachment point into multiple attachment
points. USB architecture allows a cascaded multiple hub configuration with certain power limitations
(explained later in this section).

Each hub has an upstream port, connecting to the host, and multiple downstream ports, connecting to
downstream devices, possibly including other hubs. A hub can detect attachment and detachment of
downstream devices and enable and monitor the distribution of the power to downstream devices via
their integral hardware and the operating system.

Each USB device reports its power requirements to the operating system, which then enables and
disables the device as a function of its power requirements and the amount of available power. High
powered devices typically need to be connected to a self-powered hub, such as the Hubport, which
obtains power from its external power supply and provides up to 500 mA for each downstream port. A
low-powered device, such as a mouse, can be connected to a bus-powered hub, which obtains power
from its upstream host and provides up to 100 mA for each downstream port.

Due to the limited available power for bus-powered hubs, cascading two bus-powered hubs is an
illegal topology, and devices connected to the second hub will not function. USB specifications limit the
connection of a bus-powered hub to a self-powered hub or host only. Since Edgeport/421, Edgeport/42,
Edgeport/42+, and Edgeport/416 operate as self-powered hubs, they are not affected by this
limitation.

According to the USB Specification, the maximum limit of hubs cascaded in a series cannot exceed
five. In other words, you may have a maximum of five hubs between any device and the host. This does
NOT mean that the maximum number of hubs in a system is five. You can parallel-connect up to seven
hubs at any given level. You must tally both external and embedded hubs when counting downstream
hubs.

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Regulatory information

Regulatory information

Digi complies with all U.S. federal regulations for digital devices as well as the international
regulations described below.

Regulatory statements

For U.S. Government use:

Computer software is furnished with Restricted Rights in accordance with FAR 52.227-14. Technical
Data is furnished with Limited Rights in accordance with DFAR 252.227-7013 (b) (3) of the clause
entitled RIGHTS IN TECHNICAL DATA – NONCOMMERCIAL ITEMS.”

For non-U.S. Government use:

These programs are supplied under a license. They may be used, disclosed, and/or copied only as
supplied under such license agreement. Any copy must contain the above copyright notice and
restricted rights notice. Use, copying, and/or disclosure of the programs is strictly prohibited unless
otherwise provided for in the license agreement.

Radio Frequency Interface (RFI) (FCC 15.105)

This device has been tested and found to comply with the limits for Class B digital devices pursuant to
Part 15 Subpart B, of the FCC rules. These limits are designed to provide reasonable protection
against harmful interference in a residential environment. This equipment generates, uses, and can
radiate radio frequency energy, and if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try and correct the interference by one or more of the following
measures:

n Reorient or relocate the receiving antenna.

n Increase the separation between the equipment and receiver.

n Connect the equipment into an outlet on a circuit different from that to which the receiver is

connected.

n Consult the dealer or an experienced radio/TV technician for help.

Labeling Requirements (FCC 15.19)

This device complies with Part 15 of FCC rules. Operation is subject to the following two conditions: (1)
this device may not cause harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.

If the FCC ID is not visible when installed inside another device, then the outside of the device into
which the module is installed must also display a label referring to the enclosed module FCC ID.

Modifications (FCC 15.21)

Changes or modifications to this equipment not expressly approved by Digi may void the user’s
authority to operate this equipment.

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Regulatory information

Industry Canada

This digital apparatus does not exceed the Class B limits for radio noise emissions from digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.

Le present appareil numerique n’emet pas de bruits radioelectriques depassant les limites applicables
aux appareils numeriques de la class B prescrites dans le Reglement sur le brouillage radioelectrique
edicte par le ministere des Communications du Canada.

Europe

For OEM labeling, the "CE" mark must be affixed to a visible location on the OEM product. The
following figure shows CE labeling requirements.

WARNING! The connection of a non-shielded interface cable to this equipment will
invalidate the FCC Certification for this device.

The CE mark shall consist of the initials “CE” taking the following form:

n If the CE marking is reduced or enlarged, the proportions given in the above graduated

drawing must be respected.

n The CE marking must have a height of at least 5 mm except where this is not possible on

account of the nature of the apparatus.

n The CE marking must be affixed visibly, legibly, and indelibly.

Conforms to the relevant EU Directives listed here:

EMC Directive 2004/108/EC|

Low Voltage Directive 2006/95/EC

Radio Equipment Directive

If the Edgeport® USB is incorporated into a product, the manufacturer must ensure compliance of the
final product with articles 3.1a and 3.1b of the RE Directive (Radio Equipment Directive).

Declaration of Conformity (DoC)

Digi has issued Declarations of Conformity for the Digi Edgeport products concerning emissions, EMC,
and safety.

China RoHS statement

The Table of Toxic and Hazardous Substances/Elements and their Content shall apply to any product
covered by this manual and labeled with the following symbol:

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Regulatory information

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