SeaLevel UltraCOMM+2.LPCIe User manual

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
UltraCOMM+2.LPCIe
User Manual | 7205e and 7205eS

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
Contents
CONTENTS...........................................................................................................................................................2
INTRODUCTION ................................................................................................................................................... 3
BEFORE YOU GET STARTED ...............................................................................................................................4
HARDWARE DESCRIPTION ................................................................................................................................. 5
HARDWARE CONFIGURATION............................................................................................................................6
SOFTWARE INSTALLATION ................................................................................................................................8
HARDWARE INSTALLATION .............................................................................................................................10
TECHNICAL DESCRIPTION ...............................................................................................................................19
TECHNICAL SPECIFICATIONS..........................................................................................................................23
APPENDIX A – TROUBLESHOOTING................................................................................................................24
APPENDIX B – HANDLING INSTRUCTIONS.....................................................................................................29
APPENDIX C – ELECTRICAL INTERFACE ........................................................................................................30
APPENDIX D – ASYNCHRONOUS COMMUNICATIONS ..................................................................................31
APPENDIX E – MECHANICAL DRAWING .........................................................................................................32
APPENDIX F – COMPLIANCE NOTICES...........................................................................................................33
WARRANTY ........................................................................................................................................................34

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
Introduction
The Sealevel COMM+2.LPCIe (Item# 7205e) provides a PCI Express 1.0a compliant interface adapter with
two asynchronous serial ports for industrial automation and control applications. The serial ports are field
selectable for RS-232, RS-422, or RS-485 and support data rates to 921.6K bps.
Configure both ports as RS232 for standard serial COM: port requirements. Choose the RS-422 mode for
long distance device connections up to 4000ft. where noise immunity and high data integrity are essential.
Select RS-485 and capture data from multiple peripherals in an RS485 multi-drop network. Up to 31 RS-
485 devices can be connected to each port to automate your data collection. You can even mix the ports
in any of the interface combinations to provide maximum flexibility to your application.
In RS-485 mode, the transmitter is automatically enabled in hardware, eliminating the need for application
software control. This allows the 7205e to be used with standard serial communications applications and
removes the risk of bus contention and data corruption. In RS-232 mode, all modem control signals are
implemented for maximum compatibility with a wide range of serial peripherals. The Sealevel SeaCOM
software driver and utilities make installation and operation easy XP, Vista, Windows 7, Windows 8, and
Linux operating systems.
The 7205e ships with a low profile PC bracket for use in systems with a low profile PCI Express slot. If you
need a standard size PC bracket, order the 7205eS.
Features
•PCI Express two-port serial interface adapter
•Each port configurable for RS-232, RS-422, or RS-485
•High performance 16C950 UART with 128-byte FIFOs
•Each port supports data rates to 921.6K bps
•Oscillator and clock prescalar support wide range of baud rates
•Supports 9-bit protocol framing
•PCI Express 1.0a compliant via X1 connector
•Compatible with all low profile and standard size PCI Express slots
•All modem control signals implemented in RS-232 mode
•Includes 36” cable that terminates to two DB9M connectors

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
Before You Get Started
What’s Included
Depending on the PC bracket ordered, the 7205e is shipped with the following items. If any of these items
are missing or damaged, please contact Sealevel for replacement.
•COMM+2.LPCIe – Two-Port RS-232/422/485 Serial Interface
7205e – PCI Express Board with Low Profile PC Bracket
7205eS – PCI Express Board with Standard Height PC Bracket
•CA203 – DB25F to (2) DB9M Cable, 36” in Length
Advisory Conventions
Warning
The highest level of importance used to stress a condition where damage could result to the
product, or the user could suffer serious injury.
Important
The middle level of importance used to highlight information that might not seem obvious or a
situation that could cause the product to fail.
Note
The lowest level of importance used to provide background information, additional tips, or other
non-critical facts that will not affect the use of the product.

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
Hardware Description
PCI Express Board
The 7205e is a low profile PCI Express 1.0a compliant board via single lane x1 slot. It can be used in any
single- or multi-lane PCI Express slot. It is available in standard height PCI Express as item# 7205eS.
DB25M Board Connector
The board integrates a DB25 male connector for interfacing the two serial ports via the included cable.
DB9M Serial Connectors
The 7205e ships with a two-port cable (Item# CA203) that includes four DB9 male serial connectors. The
pin out for these connectors is detailed in the following Technical Description section.

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
Hardware Configuration
There are two sets of 7-position dipswitches on the board that are used to set the electrical interface,
termination, and biasing. The dipswitch located at ‘SW1’ is labeled ‘PORT 1’ and configures the first serial
port. The dipswitch located at ‘SW2’ is labeled ‘PORT 2’ and configures the second serial port. The labels
and description of the function for each switch are detailed in the following table.
Dipswitch Settings
Switch
Description
M1 Sets the electrical interface mode (with M0)
M0 Sets the electrical interface mode (with M1)
T Adds or removes 120 termination
PU Adds or removes 1K pull-up resistor in RS-422/485 mode
PD Adds or removes 1K pull-down resistor in RS-422/485 mode
L Connects TX– to RX– for RS-485 two-wire operation
L Connects TX+ to RX+ for RS-485 two-wire operation
The location of the dipswitches is outlined in green in the image below. The default configuration settings
are shown in drawing.

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
Electrical Interface Modes
Each port on the 7205e can be individually configured for RS-232, RS-422, or RS-485 mode. The first two
switches labeled ‘M1’ and ‘M0’ are used to select the electrical interface. To simplify installation and testing
the board is shipped in RS-422 mode. Use the settings in the table below to assist you in configuring the
electrical interface.
M1
M0
Interface
OFF OFF RS-232
OFF ON RS-422 [Default]
ON OFF RS-485 ECHO Enabled
ON ON RS-485 No ECHO
Termination & Biasing Resistors
Typically, each end of the RS-485 bus must have line terminating resistors enabled (RS-422 should
terminate the receive end only). A 120 ohm resistor is across each RS-422/485 input in addition to a 1K
ohm pull-up and pull-down combination that biases the receiver inputs. Use the switches detailed in the
table below to customize the interface to your specific requirements.
If using the board in an RS-485 two-wire network, enable the two switches labeled ‘L’, which tie the
positive/negative transmit/receive pairs together.
Switch Default Description
T ON Adds 120Ω termination, OFF to remove
PU ON Adds 1K Ω pull-up resistor in RS-422/485
Off to remove
PD ON Adds 1K Ω pull-down resistor in RS-422/485
OFF to remove
L OFF ON to connect TX– to RX– for RS-485 two-wire
L OFF ON to connect TX+ to RX+ for RS-485 two-wire

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
Software Installation
Windows Installation
Do not install the Adapter in the machine until the software has been fully installed/
Only users running Windows 7 or newer should utilize these instructions for accessing and installing
the appropriate driver via Sealevel’s website. If you are utilizing an operating system prior to
Windows 7, please contact Sealevel by calling 864.843.4343 or emailing [email protected] to
receive access to the proper driver download and installation instructions.
To install Sealevel software, you must log in as an administrator or have administrator privileges in
Windows.
1. Begin by locating, selecting, and installing the correct software Sealevel SeaCOM
Asynchronous Serial Software Suite
2. Select the “SeaCOM for Microsoft Windows” from the listing.
3. Select “Download” for SeaCOM for Windows.
4. The setup files will automatically detect the operating environment and install the proper
components. Follow the information presented on the screens that follow.
5. A screen may appear with text similar to: “The publisher cannot be determined due to the
problems below: Authenticode signature not found.” Please click the ‘Yes’ button and
proceed with the installation. This declaration simply means that the operating system is
not aware of the driver being loaded. It will not cause any harm to your system.
6. During setup, the user may specify installation directories and other preferred
configurations. This program also adds entries to the system registry that are necessary
for specifying the operating parameters for each driver. An uninstall option is also included
to remove all registry/INI file entries from the system.
7. The software is now installed, and you can proceed with the hardware installation.

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
8. The following dialog box may appear, as shown below. Click the ‘OK’ button to continue.
All Sealevel Systems software drivers have been fully tested by Sealevel. Clicking ‘OK’ will
not harm your system.
9.
The following dialog box may appear, as shown below. Click the ‘OK’ button to
continue.
This is a notification that if you are upgrading from a previous driver version, you should
remove the associated Device Manager hardware entries and reinstall the adapter after the
installing the SeaCOM software.
10. The setup file will automatically detect the operating environment and install the
proper components. Next follow the information presented on the screens that
follow.
11. Refer to the Physical (Hardware) Installation section to connect and install your
adapter.

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© Sealevel Systems, Inc. 7205e Manual | SL9239 12/2022
Upgrading To The Current SeaCOM Driver
1. Download the current driver using the Instructions from the section above. Please take
note of the destination directory it will save to.
2. Uninstall the currently loaded driver SeaCOM driver found in the Control Panel. Prior to
Windows Vista SeaCOM will be populated in ‘Add/Remove Programs’ list. In Vista and
newer OSs it will be found in the ‘Programs and Features’ list.
3. Navigate to the Device Manager and remove the Sealevel adapter by right clicking on the
line item choosing ‘Uninstall’. Depending on your product, it can be found under either
‘Multiport Serial adapters’ or ‘Universal Serial Bus controllers’.
4. Single port ISA cards and PCMCIA cards will need to be uninstalled under ‘Ports (COM &
LPT)’.
5. In the Device Manager under ‘Action’, choose ‘Scan for Hardware changes’. This will
prompt the installation of the adapter and associate it with the newly installed SeaCOM
driver.
Hardware Installation
Do not install the PCI Express board until the software has been successfully installed.
The 7205e is shipped configured for RS-422 mode. If you intend to use RS-232 or RS-485 modes, configure
the adapter before installation.
Once you have installed the software, install the 7205e into an available PCI Express slot and boot the
computer. The drivers that were installed during the software installation process will automatically be
used to configure the adapter.
Once the hardware installation begins, the Found New Hardware wizard will appear three times –
first for the parent multi-interface, and then two more times for each serial port.