SEALEVEL 7401 Versa Comm+4.PCI Adapter User Manual

: June 5, 2024
: SEALEVEL

SEALEVEL 7401 Versa Comm+4.PCI Adapter

Introduction

The Sealevel Systems VERSA COMM+4.PCI provides the PC with four RS-232 asynchronous ports. The VERSA COMM+4.PCI allows for connection to any device utilizing the RS-232 electrical interface, such as modems, data-entry terminals, and plotters.

Before You Get Started

What’s Included

The VERSA COMM+4.PCI is shipped with the following items. If any of these items are missing or damaged, please contact Sealevel for replacement.

VERSA COMM+4.PCI Serial I/O Adapter
Cable consisting of either (1) DB-37 Female to (4) DB-25 Males (7401) or (1) DB-37 Female to (4) DB-9 Males (7401-DB9).

Advisory Conventions

Warning
The highest level of importance is 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 is 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 is used to provide background information, additional tips, or other non-critical facts that will not affect the use of the product.

Card Setup

Clock Modes
The VERSA COMM+4.PCI employs a unique clocking option that allows the end-user to select from divide by 4, divide by 2, and divide by 1 clocking mode. This mode is selected at J2. To select the Baud rates commonly associated with COM: ports (i.e., 2400, 4800, 9600, 19.2, … 115.2K Bps), place the jumper in the divide by 4 modes (silk-screen DIV4).

Figure 1 – Clocking Mode ‘Divide By 4’

To double these rates up to a maximum rate of 230.4Kbps, place the jumper in the divide by 2 (silk-screen DIV2) position.

Figure 2 – Clocking Mode ‘Divide By 2’

To select the maximum data rate (460.8Kbps), place the jumper in the divide by 1 (silk-screen DIV1) position.

Figure 3 – Clocking Mode ‘Divide By 1’

Baud Rates and Divisors for the ‘Div1’ Mode

The following table shows some common data rates and the rates you should choose to match them if using the adapter in the ‘Div1’ mode.

For this Data Rate	Choose this Data Rate
1200 bps	300 bps
2400 bps	600 bps
4800 bps	1200 bps
9600 bps	2400 bps
19.2Kbps	4800 bps
57.6 Kbps	9600 bps
115.2 Kbps	19.2Kbps
230.4Kbps	57.6 Kbps
460.8Kbps	115.2 Kbps

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	384
2400 bps	192
4800 bps	96
9600 bps	48
19.2Kbps	24
38.4Kbps	12
57.6Kbps	8
115.2Kbps	4
230.4Kbps	2
460.8Kbps	1

Baud Rates and Divisors for the ‘Div2’ Mode

The following table shows some common data rates and the rates you should choose to match them if using the adapter in the ‘Div2’ mode.

For this Data Rate	Choose this Data Rate
1200 bps	600 bps
2400 bps	1200 bps
4800 bps	2400bps
9600 bps	4800 bps
19.2Kbps	9600 bps
38.4Kbps	19.2Kbps
57.6 Kbps	38.4Kbps
115.2 Kbps	57.6 Kbps
230.4 Kbps	115.2 Kbps

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	192
2400 bps	96
4800 bps	48
9600 bps	24
19.2Kbps	12
38.4Kbps	8
57.6Kbps	4
115.2Kbps	2
230.4Kbps	1

Address and IRQ Selection

The VERSA COMM+4.PCI is automatically assigned I/O addresses and IRQs by your motherboard BIOS. Often, moving the board to another slot will change the I/O address or IRQ. Also adding or removing other hardware may change the assignment of I/O addresses and IRQs.

Installation

Software Installation

Windows Installation

Important Do not install the Adapter in the machine until the software has been fully installed.

Warning 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 support@sealevel.com to receive access to the proper driver download and installation instructions

Select “SeaCOM for Windows” in the downloads section of the page (click link below): https://www.sealevel.com/support/software-seacom-windows/ to download the SeaCOM software.
The setup files will automatically detect the operating environment and install the proper components. Follow the information presented on the screens that follow.
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.
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.
The software is now installed, and you can proceed with the hardware installation.

Linux Installation

Note You MUST have “root” privileges to install the software and drivers.

Warning 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 Zeacom/dox/howto). This series of files both explains typical Linux serial implementations and informs the user about Linux syntax and preferred practices.

Note 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/7401mode. 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: support@sealevel.com.

Physical Installation

The adapter can be installed in any 5V PCI expansion slot and contains several jumper straps for each port that must be set for proper.

Important Do not install the Adapter in the machine until the software has been fully installed.

Turn off PC power. Disconnect the power cord.
Remove the PC case cover.
Locate an available PCI slot and remove the blank metal slot cover.
Gently insert the PCI adapter into the slot. Make sure that the adapter is seated properly.
Replace the screw. (This is required to ensure FCC Part 15 compliance.)
Replace the cover.
Connect the power cord Installation is finished.

Technical Description

The VERSA COMM+4.PCI utilizes the 16C554 UART. This chip features a programmable baud rate, data format, interrupt control, and a 16-byte input and output FIFO and is functionally 4 16C550 UARTs. The 16C854 UART is also available on this card, which has a 128-byte FIFO as opposed to the 16-byte FIFO available in the 16C554.

Connector Pin Assignments

DB-25 Male (RS-232 DTE)

Signal	Name	Pin #	Mode
GND	Ground	7
TD	Transmit Data	2	Output
RTS	Request To Send	4	Output
DTR	Data Terminal Ready	20	Output
RD	Receive Data	3	Input
CTS	Clear To Send	5	Input
DSR	Data Set Ready	6	Input
DCD	Data Carrier Detect	8	Input
RI	Ring Indicator	22	Input

DB-9 Male (EIA-574 DTE)

Signal	Name	Pin #	Mode
GND	Ground	5
TD	Transmit Data	3	Output
RTS	Request To Send	7	Output
DTR	Data Terminal Ready	4	Output
RD	Receive Data	2	Input
CTS	Clear To Send	8	Input
DSR	Data Set Ready	6	Input
DCD	Data Carrier Detect	1	Input
RI	Ring Indicator	9	Input

DB-37 Male (Card Edge Connector)

Port #	1	2	3	4
GND	33	14	24	5
TD	35	12	26	3
RTS	17	30	8	21
DTR	34	13	25	4
RD	36	11	27	2
CTS	16	31	7	22
DSR	18	29	9	20
DCD	37	10	28	1
RI	15	32	6	23

Important Please terminate any control signals that are not going to be used. The most common way to do this is to connect RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if not used, will help ensure you get the best performance from your adapter.

Specifications

Environmental Specifications

Specification	Operating	Storage
Temperature Range	0º to 70º C (32º to 158º F)	-50º to 105º C (-58º

to 221º 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	+12VDC	-12VDC	+5 VDC
Rating	60 mA	100 mA	250 mA

Physical Dimensions

Board length	4.9 inches (12.446 cm)
Board height including Goldfingers	3.3 inches (8.382 cm)
Board height excluding Goldfingers	2.975 inches (7.557 cm)

Troubleshooting

The adapter should provide years of trouble-free service. However, in the event that the device appears to not be functioning incorrectly, the following tips can eliminate most common problems without the need to call Technical Support.

Identify all I/O adapters currently installed in your system. This includes your onboard 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.
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.
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.
Make sure the Sealevel Systems adapter is securely installed in a motherboard slot.
If you are utilizing an operating system prior to Windows 7, please contact Sealevel by calling 864-843-4343 or emailing support@sealevel.com to receive more information in regard to the utility software which will determine if your product is functioning properly.
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.
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, 864-843-4343. 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 support@sealevel.com.

How To Get Assistance

Please refer to Troubleshooting Guide prior to calling Technical Support.

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 website. 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 web page on the Internet. Our home page address is www.sealevel.com. The latest software updates and newest manuals are available via our website.
Technical support is available Monday to Friday from 8:00 A.M. to 5:00 P.M. Eastern Time. Technical support can be reached at 864-843-4343. For email support contact support@sealevel.com.

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.

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 the “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. RS232 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.

Asynchronous Communications

Serial data communications imply 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 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 predefined 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).

Silk Screen

Compliance Notices

Federal Communications Commission (FCC) Statement
This equipment has been tested and found to comply with the limits for Class A digital devices, 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 user’s 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”.

Warning

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 the 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.

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. The customer agrees to insure 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. The warranty is valid only for original purchaser and is not transferable. This warranty applies to Sealevel manufactured Products. 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 the 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, 8:00 AM to 5:00 PM EST
Phone 864-843-4343
Email support@sealevel.com

Trademarks
Sealevel Systems, Incorporated acknowledges that all trademarks referenced in this manual are the service mark, trademark, or registered trademark of the respective company.