Digi Edgeport/1i User 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.
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© 2017 Digi International Inc. All rights reserved.
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Edgeport Industrial Installation Guide 2

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
Edgeport Industrial Installation Guide 3

Edgeport Industrial Installation Guide 4
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

USB Expansion Modules-Industrial
This manual covers the following models:
nEdgeport/1i
nEdgeport/2i
nEdgeport/2s MEI
nEdgeport/4s MEI
nEdgeport/4s DC Isolated
nEdgeport/8s MEI
Edgeport Industrial Installation Guide 5

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 Type B
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
(T-)
(T+)
transmit data negative
transmit data positive
8 ▶ RA
4 ▶ RB
(R-)
(R+)
receive data negative
receive data positive
Edgeport Industrial Installation Guide 6

Edgeport/1i Jumper wire based mode configuration
Edgeport Industrial Installation Guide 7
Pin Signal Description
5 ▶ signal ground
2 ▶ no connect
Cable connections (DB9 female) for half duplex
Pin Signal Description
3 ▶ TA
7 ▶ TB
(T-)
(T+)
transmit data negative
transmit data positive
8 ▶ RA
4 ▶ RB
(R-)
(R+)
receive data negative
receive data positive
5 ▶
1 ▶
signal ground
full and half duplex
2 no connect
Note Short pin 1 to pin 5 (GND).
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
9 ▶ line termination
The user can switch on and off the following features:
nLine termination (120 ohm): To enable the line termination resistor, connect pin 9 to pin 8. To
disable line termination, leave pin 9 unconnected.
nFull 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.
nEcho 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/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 Type B
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
(T-)
(T+)
transmit data negative
transmit data positive
8 ▶ RA
4 ▶ RB
(R-)
(R+)
receive data negative
receive data positive
5 ▶ signal ground
1, 2, 6, 9 no connect
Edgeport Industrial Installation Guide 8

Edgeport/2i Configuring the DIP switches
Edgeport Industrial Installation Guide 9
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
(T-)
(T+)
transmit data negative
transmit data positive
8 ▶ RA
4 ▶ RB
(R-)
(R+)
receive data negative
receive data positive
5 ▶ signal ground
1, 2, 6,
9
no connect
Note Half duplex contains only one twisted pair.
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.

Edgeport/2i Configuring the DIP switches
Edgeport Industrial Installation Guide 10
Consult the diagrams in the following figure for various configuration options.
If the drivers are not already installed, see Edgeport driver installation.

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 Type B
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
(T-)
(T+)
transmit data negative
transmit data positive
8 ▶ RA
4 ▶ RB
(R-)
(R+)
receive data negative
receive data positive
5 ▶ signal ground
1, 2, 6, 9 no connect
Edgeport Industrial Installation Guide 11

Edgeport/2s MEI, Edgeport/4s MEI, Edgeport/4s Isolated,
Edgeport/8s MEI
Cable connections (DB9 Female) for half
duplex
Edgeport Industrial Installation Guide 12
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
(T-)
(T+)
transmit data negative
transmit data positive
8 ▶ RA
4 ▶ RB
(R-)
(R+)
receive data negative
receive data positive
5 ▶ signal ground
1, 2, 6, 9 no connect
Note Half duplex contains only one twisted pair.
DB9 RS-232 pin assignment
Pin Description
1 ▶ DCD data carrier detect
2 ▶ RD receive data
3 ▶ TD transmit data
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

Configuring the port flags
Edgeport Industrial Installation Guide 13
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:
nRS-232
nRS-422: No Terminating Resistor
nRS-422: Terminating Resistor
nRS-485: Half Duplex, End Unit, Echo
nRS-485: Half Duplex, End Unit, No Echo
nRS-485: Half Duplex, Middle Unit, Echo
nRS-485: Half Duplex, Middle Unit, No Echo
nRS-485: Full Duplex, End Unit, Master RS-485: Full Duplex, End Unit, Slave
nRS-485: Full Duplex, Middle Unit, Master
nRS-485: Full Duplex, Middle Unit, Slave

Edgeport mounting diagrams For all Edgeports except the Edgeport/1i
Edgeport Industrial Installation Guide 14
Edgeport mounting diagrams
For all Edgeports except the Edgeport/1i
Rack mount kit1
Under-shelf mounting bracket1
1Nuts, bolts, and screws are not included.

Edgeport driver installation
Edgeport Industrial Installation Guide 15
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.

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.
Edgeport Industrial Installation Guide 16

Information tab
The Information tab allows you to review the manufacturing information pertaining to your device.
Edgeport Industrial Installation Guide 17

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.
Edgeport Industrial Installation Guide 18

Port Flag Configuration tab
The Port Flag Configuration tab allows you to configure performance options and special
functionality on a per-port basis.
nLow 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.
nRemap Baud:
Setting the baud rate to 1200 baud will result in 230400 baud.
nIgnore 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.
Edgeport Industrial Installation Guide 19

Edgeport configuration utility Port Flag Configuration tab
Edgeport Industrial Installation Guide 20
nWhen 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.
nOperation:
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.
nFast 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.
nFast 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.
nDisable Plug & Play:
Do not let the serial port enumerator detect devices plugged into the Edgeport.
nIgnore 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.
nTimer 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