SeaLevel POS+4.PCI User manual

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
POS+4.PCI
User Manual | 7405

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Contents
INTRODUCTION________________________________________________________________________________________3
OVERVIEW__________________________________________________________________________________________3
BEFORE YOU GET STARTED ____________________________________________________________________________ 4
WHAT’S INCLUDED _________________________________________________________________________________4
ADVISORY CONVENTIONS __________________________________________________________________________4
CARD SETUP __________________________________________________________________________________________5
ELECTRICAL INTERFACE SELECTION _______________________________________________________________5
CLOCK MODES _____________________________________________________________________________________6
POWER SELECTION (+5/+12) _______________________________________________________________________6
ADDRESS AND IRQ SELECTION _____________________________________________________________________6
INSTALLATION ________________________________________________________________________________________7
SOFTWARE INSTALLATION _________________________________________________________________________7
OTHER OPERATING SYSTEMS ______________________________________________________________________7
PHYSICAL INSTALLATION _____________________________________________________________________________ 8
TECHNICAL DESCRIPTION _____________________________________________________________________________9
CONNECTOR PIN ASSIGNMENTS ___________________________________________________________________9
CONNECTOR PIN OUT ______________________________________________________________________________9
SPECIFICATIONS _____________________________________________________________________________________10
ENVIRONMENTAL SPECIFICATIONS ______________________________________________________________ 10
MANUFACTURING ________________________________________________________________________________ 10
POWER CONSUMPTION __________________________________________________________________________ 10
(MEAN TIME BETWEEN FAILURES (MTBF) ________________________________________________________ 10
PHYSICAL DIMENSIONS __________________________________________________________________________ 10
APPENDIX A – TROUBLESHOOTING ___________________________________________________________________11
APPENDIX B – HOW TO GET ASSISTANCE _____________________________________________________________12
APPENDIX C – ELECTRIAL INTERFACE ________________________________________________________________13
RS-232 ___________________________________________________________________________________________ 13
RS-485 ___________________________________________________________________________________________ 13
APPENDIX D – ASYNCHRONOUS COMMUNICATIONS __________________________________________________14
APPENDIX E – SILK SCREEN __________________________________________________________________________15
APPENDIX F – COMPLIANCE NOTICES ________________________________________________________________16
FEDERAL COMMUNICATIONS COMMISSION (FCC) STATEMENT __________________________________ 16
EMC DIRECTIVE STATEMENT _____________________________________________________________________ 16
WARRANTY___________________________________________________________________________________________17

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Introduction
Overview
The Sealevel POS+4.PCI is a four channel PCI Bus serial I/O adapter supporting data rates up to 921.6K
bps in the RS-485 mode and 460.8K in the RS-232 mode. This adapter is equipped with industry standard
RJ-45 connectors to ease in cabling.
The RS-232 compatibility allows for connection to devices utilizing the RS-232 electrical interface, such as
modems, data-entry terminals, and plotters.
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).
In both RS-232 and RS-485 modes, the card works seamlessly with the standard operating system serial
driver. In RS-485 mode, our special auto-enable feature allows the RS-485 ports to be viewed by the
operating system as a COM: port. This allows the standard COM: driver to be utilized for RS-485
communications. Our on-board hardware automatically handles the RS-485 driver enable.
The POS+4.PCI provides the integrator with either fused +5 or +12 power for use in Point of Sale
applications such as cash drawers and attention lamps. This power is selectable on a port by port basis
allowing for fully customizable integrations.

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Before You Get Started
What’s Included
The POS+4.PCI is shipped with the following items. If any of these items is missing or damaged, contact
the supplier.
• POS+4.PCI Serial I/O Adapter
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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Card Setup
Electrical Interface Selection
The POS+4.PCI has two modes of operation that are controlled by dipswitch SW1. Switch SW2 positions
1–4 control these modes of operation. Set the corresponding switch either ‘On’ for RS-485 or ‘Off’ for RS-
232. For example if Port 1 is to be RS-485, then switch position ‘1’ would be on. Refer to the following
example for guidance.
SW2
Typically, each end of the RS-485 bus must have a line-terminating resistor .A 120-ohm resistor is across
each RS-422/485 input in addition to a 1K-ohm pull-up/pull-down combination that biases the receiver
inputs. Only the ends of an RS-485 network should have the 120-Ohm terminating resistor. The POS+4.PCI
provides an option for including or excluding the termination resistors commonly found in RS-485
implementations at switch positions SW1 1 – 4. To place the resistor in the circuit set the switch to ‘On’ to
remove the resistor from the circuit, set the switch to ‘Off’.
1
2
3
4
ON
OFF
1
2
3
4
ON
OFF
SW1

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Clock Modes
The POS+4.PCI employs a unique clocking option that allows the end user to select from divide by 8 and
divide by 1 clocking modes. These modes are selected at Header E5.
To select the Baud rates commonly associated with COM: ports (i.e. 2400, 4800, 9600, 19.2, … 115.2K Bps)
select the DIV8 position.
To select the maximum data rate (921.6K bps) select the DIV1 position.
The DIV1 position may be used for data rates up to 460.8K when in the RS-232 mode, the maximum
data rate of 921.6K can only reliability be achieved in the RS-485 mode.
Power Selection (+5/+12)
The POS+4.PCI has the ability to provide DC power on pin 5 of the RJ-45 connector to be used by the
integrator in low power implementations. This power is fused at 1A across all ports and is selectable as +5,
+12 VDC or no power required. E1 - 4 provides this selective ability. E1 is for Port 1, E2 is for Port 2, E3 is
for Port 3 and E4 is for Port 4.
Address and IRQ selection
The POS+4.PCI is automatically assigned resources by your motherboard BIOS. Only the I/O addresses
may be modified by the user. Adding or removing other hardware may change the assignment of I/O
addresses and IRQs.
E1
Port 1
E2
Port 2
E3
Port 3
E4
Port 4
+5
+12
Port 1 and 3 +5VDC
Port 2 +12 VDC
Port 4 No power

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
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] 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 (#7405) 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.
For additional software support, please call Sealevel Systems’ Technical Support, [phone]. Our
technical support is free and available from 8:00 AM - 5:00 PM Eastern Time, Monday through Friday. For
email support contact: [e-mail].
Other Operating Systems
Refer to the appropriate section of the Serial Utilities Software.

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Physical Installation
Do not install the Adapter in the machine until the software has been fully installed.
The POS+4.PCI can be installed in any of the PCI expansion slots and contains configuration options for
each port that must be set for proper operation.
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 POS+4.PCI into the slot. Make sure that the adapter is seated properly.
5. Replace the screw.
6. Replace the cover.
7. Connect the power cord.
Installation is complete.

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Technical Description
The Sealevel Systems POS+4.PCI provides a PCI interface adapter with 4 RS-232/485 asynchronous serial
ports for industrial automation and control applications.
The POS+4.PCI utilizes the 16C864 UART. This chip features programmable baud rates, data format,
interrupt control and industry leading 128-byte transmit and receive FIFOs.
Connector Pin Assignments
The POS+4.PCI utilizes the industry standard RJ-45 connectors. The following illustration shows the
location of each port and the pin numbers.
View from Bracket Edge
Connector Pin out
Signal
Pin #
Mode
GND
4
RS-232 TD
3
Output
RS-232 RTS
2
Output
RS-232 RD
6
Input
RS-232 CTS
7
Input
RS-485 Data -
8
Input/Output
RS-485 Data +
1
Input/Output
Power +5/+12
5
Power
Port 1
Port 2
Port 3
Port 4
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Specifications
Environmental Specifications
Specification Operating Storage
Temperature Range 0º to 50º C (32º to 122º F) -20º to 70º C (-4º to 158º F)
Humidity Range 10 to 90% R.H. Non-Condensing 10 to 90% R.H. Non-Condensing
Manufacturing
All Sealevel Systems Printed Circuit boards are built to UL 94V0 rating and are 100% electrically tested.
These printed circuit boards are solder mask over bare copper or solder mask over tin nickel.
Power Consumption
Supply line +5 VDC
Rating 620 mA
(Mean Time Between Failures (MTBF)
Mean Time Between Failure Greater than 150,000 hours (Calculated)
Physical Dimensions
Board Length 5.2 inches (13.208 cm)
Board Height including Goldfingers 4.2 inches (10.66 cm)

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Appendix A – Troubleshooting
The adapter should provide years of trouble-free service. However, in the event that device appears to not
be functioning incorrectly, the following tips can eliminate most common problems without the need to call
Technical Support.
1. Identify all I/O adapters currently installed in your system. This includes your on-board serial ports,
controller cards, sound cards etc. The I/O addresses used by these adapters, as well as the IRQ (if
any) should be identified.
2. Configure your Sealevel Systems adapter so that there is no conflict with currently installed
adapters. No two adapters can occupy the same I/O address.
3. Make sure the Sealevel Systems adapter is using a unique IRQ The IRQ is typically selected via an
on-board header block. Refer to the section on Card Setup for help in choosing an I/O address and
IRQ.
4. Make sure the Sealevel Systems adapter is securely installed in a motherboard slot.
5. If you are utilizing an operating system prior to Windows 7, please contact Sealevel‘s Technical
support as directed below to receive more information regarding the utility software which will
determine if your product is functioning properly.
6. Only users running Windows 7 or newer should utilize the diagnostic tool ‘WinSSD’ installed in the
SeaCOM folder on the Start Menu during the setup process. First find the ports using the Device
Manager, then use ‘WinSSD’ to verify that the ports are functional.
7. Always use the Sealevel Systems diagnostic software when troubleshooting a problem. This will
help eliminate any software issues and identify any hardware conflicts.
If these steps do not solve your problem, please call Sealevel Systems’ Technical Support, [phone].
Our technical support is free and available from 8:00 A.M.- 5:00 P.M. Eastern Time Monday through Friday.
For email support contact [e-mail].

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Appendix B – How To Get Assistance
Begin by reading through the Trouble Shooting Guide in Appendix A. If assistance is still needed please see
below.
When calling for technical assistance, please have your user manual and current adapter settings. If
possible, please have the adapter installed in a computer ready to run diagnostics.
Sealevel Systems provides an FAQ section on its web site. Please refer to this to answer many common
questions. This section can be found at http://www.sealevel.com/faq.asp.
Sealevel Systems maintains a Home page on the Internet. Our home page address is www.sealevel.com.
The latest software updates, and newest manuals are available via our FTP site that can be accessed from
our home page.
Technical support is available Monday to Friday from 8:00 AM to 5:00 PM, Eastern Time. Technical support
can be reached at [phone]. For email support contact [e-mail].
RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL SYSTEMS BEFORE RETURNED
MERCHANDISE WILL BE ACCEPTED. AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL
SYSTEMS AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION (RMA) NUMBER.

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Appendix C – Electrical Interface
RS-232
Quite possibly the most widely used communication standard is RS-232. This implementation has been
defined and revised several times and is often referred to as RS-232-C/D/E or EIA/TIA-232-C/D/E. It is
defined as “Interface between Data Terminal Equipment and Data Circuit- Terminating Equipment Employing
Serial Binary Data Interchange”. The mechanical implementation of RS-232 is on a 25-pin D sub connector.
The IBM PC computer defined the RS-232 port on a 9 pin D sub connector and subsequently the EIA/TIA
approved this implementation as the EIA/TIA-574 standard. This standard has defined as the “9-Position
Non-Synchronous Interface between Data Terminal Equipment and Data Circuit-Terminating Equipment
Employing Serial Binary Data Interchange”. Both implementations are in widespread use and will be referred
to as RS-232 in this document. RS-232 is capable of operating at data rates up to 20K bps / 50 ft. The
absolute maximum data rate may vary due to line conditions and cable lengths. RS-232 often operates at
38.4K bps over very short distances. The voltage levels defined by RS-232 range from -12 to +12 volts. RS-
232 is a single ended or unbalanced interface, meaning that a single electrical signal is compared to a
common signal (ground) to determine binary logic states. A voltage of +12 volts (usually +3 to +10 volts)
represents a binary 0 (space) and -12 volts (-3 to -10 volts) denote a binary 1 (mark). The RS-232 and the
EIA/TIA-574 specification define two types of interface circuits Data Terminal Equipment (DTE) and Data
Circuit Terminating Equipment (DCE). The Sealevel Systems Adapter is a DTE interface.
RS-485
RS-485 is backwardly compatible with RS-422; however, it is optimized for party line or multi-drop
applications. The output of the RS-422/485 driver is capable of being Active (enabled) or Tri-State
(disabled). This capability allows multiple ports to be connected in a multi-drop bus and selectively polled.
RS-485 allows cable lengths up to 4000 feet and data rates up to 10 Megabits per second. The signal levels
for RS-485 are the same as those defined by RS-422. RS-485 has electrical characteristics that allow for 32
drivers and 32 receivers to be connected to one line. This interface is ideal for multi-drop or network
environments. RS-485 tri-state driver (not dual-state) will allow the electrical presence of the driver to be
removed from the line. Only one driver may be active at a time and the other driver(s) must be tri-stated.
RS-485 can be cabled in two ways, two wire and four wire mode. Two-wire mode does not allow for full
duplex communication and requires that data be transferred in only one direction at a time. For half-duplex
operation, the two transmit pins should be connected to the two receive pins (Tx+ to Rx+ and Tx- to Rx-).
Four wire mode allows full duplex data transfers. RS-485 does not define a connector pin-out or a set of
modem control signals.

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Appendix D – Asynchronous Communications
Serial data communications implies that individual bits of a character are transmitted consecutively to a
receiver that assembles the bits back into a character. Data rate, error checking, handshaking, and
character framing (start/stop bits) are pre-defined and must correspond at both the transmitting and
receiving ends.
Asynchronous communications is the standard means of serial data communication for PC compatibles
and PS/2 computers. The original PC was equipped with a communication or COM: port that was designed
around an 8250 Universal Asynchronous Receiver Transmitter (UART). This device allows asynchronous
serial data to be transferred through a simple and straightforward programming interface. A start bit,
followed by a pre-defined number of data bits (5, 6, 7, or 8) defines character boundaries for asynchronous
communications. The end of the character is defined by the transmission of a pre-defined number of stop
bits (usually 1, 1.5 or 2). An extra bit used for error detection is often appended before the stop bits.
This special bit is called the parity bit. Parity is a simple method of determining if a data bit has been lost
or corrupted during transmission. There are several methods for implementing a parity check to guard
against data corruption. Common methods are called (E)ven Parity or (O)dd Parity. Sometimes parity is not
used to detect errors on the data stream. This is referred to as (N)o parity. Because each bit in
asynchronous communications is sent consecutively, it is easy to generalize asynchronous
communications by stating that each character is wrapped (framed) by pre-defined bits to mark the
beginning and end of the serial transmission of the character. The data rate and communication
parameters for asynchronous communications have to be the same at both the transmitting and receiving
ends. The communication parameters are baud rate, parity, number of data bits per character, and stop
bits (i.e. 9600,N,8,1).
Remain Idle o
r
next start bit
Odd, Even
or
Unused
STOP
P
BIT
5
to 8 Data Bits
Idle state of
line
1
0
1
1.5
2

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Appendix E – Silk Screen

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Appendix F – Compliance Notices
Federal Communications Commission (FCC) Statement
This equipment has been tested and found to comply with the limits for Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial 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. Operation of this equipment in a residential
area is likely to cause harmful interference in such case the user will be required to correct
the interference at the users expense.
EMC Directive Statement
Products bearing the CE Label fulfill the requirements of the EMC directive (89/336/EEC)
and of the low-voltage directive (73/23/EEC) issued by the European Commission. To obey
these directives, the following European standards must be met:
•EN55022 Class A- “Limits and methods of measurement of radio interference
characteristics of information technology equipment”
•EN55024 – “Information technology equipment Immunity characteristics Limits
and methods of measurement”.
This is a Class A Product. In a domestic environment, this product may cause radio interference in
which case the user may be required to take adequate measures to prevent or correct the
interference.
Always use cabling provided with this product if possible. If no cable is provided or if an alternate
cable is required, use high quality shielded cabling to maintain compliance with FCC/EMC directives.

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© Sealevel Systems, Inc. 7405 Manual | SL9065 12/2022
Warranty
Sealevel's commitment to providing the best I/O solutions is reflected in the Lifetime Warranty that is
standard on all Sealevel manufactured I/O products. We are able to offer this warranty due to our control
of manufacturing quality and the historically high reliability of our products in the field. Sealevel products
are designed and manufactured at its Liberty, South Carolina facility, allowing direct control over product
development, production, burn-in and testing. Sealevel achieved ISO-9001:2015 certification in 2018.
Warranty Policy
Sealevel Systems, Inc. (hereafter "Sealevel") warrants that the Product shall conform to and perform in
accordance with published technical specifications and shall be free of defects in materials and
workmanship for the warranty period. In the event of failure, Sealevel will repair or replace the product at
Sealevel's sole discretion. Failures resulting from misapplication or misuse of the Product, failure to adhere
to any specifications or instructions, or failure resulting from neglect, abuse, accidents, or acts of nature
are not covered under this warranty.
Warranty service may be obtained by delivering the Product to Sealevel and providing proof of purchase.
Customer agrees to ensure the Product or assume the risk of loss or damage in transit, to prepay shipping
charges to Sealevel, and to use the original shipping container or equivalent. Warranty is valid only for
original purchaser and is not transferable.
This warranty applies to Sealevel manufactured Product. Product purchased through Sealevel but
manufactured by a third party will retain the original manufacturer's warranty.
Non-Warranty Repair/Retest
Products returned due to damage or misuse and Products retested with no problem found are subject to
repair/retest charges. A purchase order or credit card number and authorization must be provided in order
to obtain an RMA (Return Merchandise Authorization) number prior to returning Product.
How to obtain an RMA (Return Merchandise Authorization)
If you need to return a product for warranty or non-warranty repair, you must first obtain an RMA number.
Please contact Sealevel Systems, Inc. Technical Support for assistance:
Available Monday – Friday, 8:00AM to 5:00PM EST
Phone [phone]
Email [e-mail]
Trademarks
Sealevel Systems, Incorporated acknowledges that all trademarks referenced in this manual are the service
mark, trademark, or registered trademark of the respective company.