SeaLevel SIO-485.LPCI User manual

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© Sealevel Systems, Inc. 7107 Manual | SL90557/2021
SIO-485.LPCI
User Manual | 7107

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© Sealevel Systems, Inc. 7107 Manual | SL90557/2021
Contents
CONTENTS............................................................................................................................................................................................................................2
INTRODUCTION...................................................................................................................................................................................................................3
BEFORE YOU GET STARTED..............................................................................................................................................................................................4
SOFTWARE INSTALLATION ...............................................................................................................................................................................................6
PHYSICAL INSTALLATION.................................................................................................................................................................................................8
CARD SETUP........................................................................................................................................................................................................................9
ELECTRICAL CHARACTERISTICS...................................................................................................................................................................................12
APPENDIX A –TROUBLESHOOTING.............................................................................................................................................................................13
APPENDIX B –HOW TO GET ASSISTANCE..................................................................................................................................................................14
APPENDIX C –ELECTRICAL INTERFACE......................................................................................................................................................................15
APPENDIX D –ASYNCHRONOUS COMMUNICATIONS.............................................................................................................................................16
APPENDIX E –SILK SCREEN –7107 PCB ....................................................................................................................................................................17
APPENDIX F –COMPLIANCE NOTICES.........................................................................................................................................................................18
WARRANTY ........................................................................................................................................................................................................................19

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© Sealevel Systems, Inc. 7107 Manual | SL90557/2021
Introduction
The SIO-485.LPCI, Item Number 7107, is a low profile PCI module that provides a single RS-422/485 serial
interface port. The board is designed using the OX16C950 UART, which features a 128-byte FIFO and
flexible clock prescalar (from 1 to 31.875), with support for 9-bit protocol and isochronous mode.
RS-422 provides excellent communications for long distance device connections up to 4000 ft., where
noise immunity and high data integrity are essential.
RS-485 is optimized for ‘Multi-Drop’ or ‘Party-line’ operations selecting data from multiple peripherals (as
many as 31 devices can be connected on an RS-485 bus).
The SIO-485.LPCI is designed to be used with a variety of Operating Systems including Windows, Linux, and
DOS. The SeaCOM API (Application Programmer Interface) included in the software for the SIO-485.LPCI
provides a variety of useful high-level function calls implemented as a Windows dynamic link library (DLL)
and as a Linux kernel module and library. In addition to the API, SeaCOM includes sample code and utilities
to simplify software development.
Other Sealevel Low Profile PCI Serial I/O Products
Model No.
Part No.
Description
COMM+850.LPCI
(P/N 7104)
- 1-Port RS-232
Ultra 530.LPCI
(P/N 7106)
- 1-Port RS-232/422/485
Ultra COMM+I.LPCI
(P/N 7108)
- 1-Port Isolated RS-232/422/485
Ultra COMM+2.LPCI
(P/N 7205)
- 2-Port RS-232/422/485
COMM+4.LPCI
(P/N 7406)
- 4-Port RS-232
COMM+8.LPCI
(P/N 7803)
- 8-Port RS-232

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© Sealevel Systems, Inc. 7107 Manual | SL90557/2021
Before You Get Started
What’s Included
The SIO-485.LPCI is shipped with the following items. If any of these items are missing or damaged, please
contact Sealevel for replacement.
•SIO-485.LPCI Adapter
•7107 includes low profile PCI bracket
•7107S includes standard size PCI bracket
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. 7107 Manual | SL90557/2021
Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing the SIO4-104.485. All items can be purchased from our website (http://www.sealevel.com/) or
by calling 864-843-4343.
DB9 Female to RJ45 modular adapter (Item Number DB112)
The DB112 is pinned out for RS-485 signals and converts the 7107 DB9 Male connector to an RJ45
connection. Designed for use with SeaI/O M-series modules, it takes power from pin 9 on the 7107
and sends it out over any standard RJ45 patch cable. This eliminates the need for an external power
supply when communicating with SeaI/O RS-485 devices.
DB9 Male to DB9 Female Optomux adapter (Item Number DB103)
The DB103 is designed to convert a Sealevel DB9 Male connector to a pinout compatible with AC24AT
and AC422AT Opto-22 ISA bus cards. This allows Optomux devices to be controlled from any Sealevel
RS-422 board with a DB9 Male connector.
DB9 Male to DB9 Male Sony SMPTE 207M cable (Item Number CA190)
This cable allows any Sealevel RS-422 adapter with a DB-9 to connect directly to a Sony (or
compatible) 207M 9-Pin connector.

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© Sealevel Systems, Inc. 7107 Manual | SL90557/2021
Software Installation
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]om to receive access to the proper driver download and installation
instructions.
1. Begin by locating, selecting, and installing the correct software from the Sealevel software
driver database.
2. Type in or select the part number (#7107) for the adapter from the listing.
3. Select “Download Now” 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. 7107 Manual | SL90557/2021
Linux Installation
You MUST have “root” privileges to install the software and drivers.
The syntax is case sensitive.
SeaCOM for Linux can be downloaded here: https://www.sealevel.com/support/software-seacom-linux/.
It includes the README and the Serial-HOWTO help files (located at seacom/dox/howto). This series of
files both explains typical Linux serial implementations and informs the user about Linux syntax and
preferred practices.
User can use a program such as 7-Zip to extract the tar.gz file.
In addition, the software selectable interface settings can be accessed by referencing
seacom/utilities/7107mode.
For additional software support, including QNX, please call Sealevel Systems’ Technical Support, (864) 843-
4343. Our technical support is free and available from 8:00 AM - 5:00 PM Eastern Time, Monday through
Friday. For email support contact: su[email protected]om.
3rd Party Software Support
For the most up to date information on third party software support, please visit
https://www.sealevel.com/support/3rd-party-software-support/.

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© Sealevel Systems, Inc. 7107 Manual | SL90557/2021
Physical Installation
The adapter can be installed in any PCI expansion slot.
Do not install the Adapter in the machine until the software has been fully installed.
1. Turn off PC power. Disconnect the power cord.
2. Remove the PC case cover.
3. Locate an available PCI slot and remove the blank metal slot cover.
4. Gently insert the PCI adapter into the slot. Make sure that the adapter is seated properly.
5. Replace the screw. (This is required to ensure FCC Part 15 compliance.)
6. Replace the cover.
7. Connect the power cord
8. Installation is finished.
The SIO-485.LPCI is now ready for use.
Physical Connection
RS-422
Signal
Name
Pin #
Mode
GND
Ground
5
TX +
Transmit Data Positive
4
Output
TX-
Transmit Data Negative
3
Output
RX+
Receive Data Positive
1
Input
RX-
Receive Data Negative
2
Input
5V/12V
Power selected by E1
9
Output
RS-485
Signal
Name
Pin #
Mode
GND
Ground
5
DATA+
Data Positive
1
I/O
DATA-
Data Negative
2
I/O
5V/12V
Power selected by E1
9
Output

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© Sealevel Systems, Inc. 7107 Manual | SL90557/2021
Card Setup
Address and IRQ Selection
The SIO4-104.485 is automatically assigned I/O addresses and IRQs by your motherboard BIOS. Only the
I/O address may be modified by the user. Adding or removing other hardware may change the assignment
of I/O addresses and IRQs.
Electrical Interface Selection
The SIO-485.LPCI can be individually configured via SW1 as RS-422, or as a two/four wire RS-485 interface.
The following table illustrates the electrical modes for SW1:
Electrical Mode
Switch Position 1
Switch Position 2
Switch Position 3
RS-422
Off
Off
Off
RS-485 4 Wire
On
On
Off
RS-485 2 Wire
Off
On
On
Line Termination
Typically, each end of the RS-485 bus must have line-terminating resistors (RS-422 terminates at the receive
end only). A 120-ohm resistor is across the RS-422/485 data input in addition to a 1K-ohm pull-up/pull-
down combination that biases the receiver inputs. The 120-Ohm termination is ‘switched’ in or out by SW1
(silk screen position ‘T’). With the switch in the ‘On’ position, termination is present. With it in the ‘Off’
position termination is removed.
RS-485 'Echo'
The RS-485 ‘Echo’ is the result of connecting the receiver inputs to the transmitter outputs. Every time a
character is transmitted; it is also received. The SIO-485.LPCI automatically suppresses this ‘Echo.’
Clock Modes
The SIO-485.LPCI utilizes a 14.7456 MHz oscillator. This is eight times faster than the standard COM: port
oscillator, which typically is 1.8432 MHz. This allows the adapter to achieve a maximum data rate of
921.6Kbps. The following sections outline the baud rate calculations and instructions for achieving your
desired baud rate.
Baud Rates and Oscillator Value
The following table shows some common data rates and the rates you should choose to achieve them
when using the SIO-485.LPCI. If the O/S of choice is Windows 95/98/ME/2000/NT/XP, the oscillator value
(14.7456 MHz) should be entered into the ‘Advanced Tab’ on 95/98/Me/2000/XP Device Manager applet.
Typically, this is done automatically when the Sealevel Software driver is loaded.

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© Sealevel Systems, Inc. 7107 Manual | SL90557/2021
When using Windows NT, the ‘Advanced Ports’ applet in the Control Panel should be launched and the
oscillator value entered manually in the ‘Advanced’ tab, or all data rates will be eight (8) times the selected
rate. For example, if a data rate of 19.2Kbps is selected, the actual data rate will be 153.6Kbps.
When using any other OS (i.e., Linux) the following table should be used:
For this Data Rate
Choose this Data Rate
1200 bps
150 bps
2400 bps
300 bps
4800 bps
600 bps
9600 bps
1200 bps
19.2K bps
2400 bps
38.4K bps
4800 bps
57.6K bps
7200 bps
76.8K bps
9600 bps
115.2K bps
14.4K bps
153.6K bps
19.2K bps
230.4K bps
28.8K bps
460.8K bps
57.6K bps
921.6K bps
115.2K bps
If your communications package allows the use of baud rate divisors, choose the appropriate divisor from
the following table:
For this Data Rate
Choose this Divisor
1200 bps
768
2400 bps
384
4800 bps
192
9600 bps
96
19.2K bps
48
38.4K bps
24
57.6K bps
16
115.2K bps
8
230.4K bps
4
460.8K bps
2
921.6K bps
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If you are utilizing an operating system developed after Windows XP and need additional data
rates for a different O/S not provided in the tables above, please contact Sealevel’s Technical
Support by calling 864.843.4343 or emailing [e-mail] to receive access to the
proper driver download and installation instructions.