SEALEVEL 7404e UltraCOMM+4.PCIe Interface Legacy User Manual

SEALEVEL 7404e UltraCOMM+4.PCIe Interface Legacy

Introduction

• The Sealevel Ultra COMM+4.PCIe is a four-channel RS-232/485/422 PCI express Bus serial I/O adapter supporting data rates up to 921.6Kbps.
• The RS-232 compatibility allows for connection to devices utilizing the RS-232 electrical interface, such as modems, data-entry terminals, and plotters.
• RS-422 provides excellent communications for long-distance device connections up to 4000ft., 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).
• In RS-485 mode, our special auto-enable feature allows the RS485 ports to be viewed by the operating system as a COM: port. This allows the software application to utilize the serial port for RS485 communication without the need to control the direction of data between the master and slave device. Our onboard hardware automatically handles the RS-485 driver enable.
• The Ultra COMM+4.PCIe will operate on x1, x4, x8, or x16 PCIe Bus slots.

Features

• Each port individually configurable for RS-232, RS-422, or RS-485
• 16C954 buffered UARTs with 128-byte FIFOs
• Oscillator and clock pre-scalar support a wide range of baud rates
• Supports 9-bit protocol framing
• Each port supports data rates to 921.6Kbps
• RS-485 line termination, pull-up, and pull-down resistors for each port are selectable via dipswitch
• RS-485 ECHO can be enabled/disabled via dipswitch
• PCI Express x1 compliant
• Compatible with all standard-size PCI Express slots
• All modem control signals implemented in RS-232 mode
• Automatic RS-485 enable/disable in hardware
• Included 36″ cable terminates to four DB9M connectors (Item# CA143)

Before You Get Started

What’s Included
The Ultra COMM+4.PCIe is shipped with the following items. If any of these items are missing or damaged, please contact Sealevel for replacement.

• Ultra COMM+4.PCIe Serial I/O Adapter
• CA143 – DB37 Female to (4) DB9 Male, 36” in length cable

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 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.

Optional Items
Depending upon your application, you are likely to find one or more of the following items useful with the Ultra COMM+4.PCIe. All items can be purchased from our website (www.sealevel.com) by calling our sales team at (864) 843-4343.

DB9 to DB25 Serial Cable (Item# CA176)

DB9 Female (RS-422) to DB25 Male (RS-530) Cable, 10 in Length

|
Terminal Block Kit (Item# KT106)

Terminal Block Kit – TB06 + (2) CA127 Cables

|
Terminal Block Kit (Item# KT105)

Terminal Block Kit – TB05 + CA127 Cable

|
Terminal Block Kit (Item# TB34-4)

Terminal Block Kit (4 Pack) – DB9 Female to 5 Screw Terminals (RS-422/485)

|

Card Setup

Address and IRQ selection
The Ultra COMM+4.PCIe is automatically assigned I/O addresses and IRQs by your motherboard BIOS or by a ‘Plug-n-Play’ Operating System. Adding or removing other hardware or moving the adapter to another slot may change the assignment of I/O addresses and IRQs.

Clock Modes
The Ultra COMM+4.PCIe derives a 62.5MHz clock from the PCI Express link which is divided by an 8-bit clock prescaler and a 16-bit clock divisor to provide a wide range of possible baud rates. Note that there are many combinations that can give the same result (e.g. Prescaler=1 and Divisor = 8, Prescaler =2 and Divisor = 4, or Prescaler=8 and Divisor = 1). As long as the calculated data rate is within +/- 2% you should communicate fine.

Baud Rates
The following table shows some common data rates and the rates you should choose to achieve when using the ULTRA COMM+4.PCIe.

For This Data Rate| Clock Prescaler| Choose This Divisor DLM: DLL
---|---|---
1200 bps| 1| 3255
2400 bps| 1.625| 1001
4800 bps| 1.750| 465
9600 bps| 1.875| 217
19.2Kbps| 1.5| 136
38.4Kbps| 1.75| 588
57.6Kbps| 1.825| 37
115.2Kbps| 1.875| 18
230.4K bps| 1| 17
460.8K bps| 2.125| 4
921.6Kbps| 2.125| 2

Electrical Interface Selection

• Each of the four ports on the ULTRA COMM+4.PCIe can be individually configured as an RS-232, RS-422, or RS-485 interface. This is selectable via the port DIP switch, each is labeled with its port number.

Switch 1 (Silk M1)| Switch 2 (Silk M0)| Mode Select
---|---|---
OFF| OFF| 232
OFF| ON| 422
ON| OFF| 485 With Echo
ON| ON| 485 No Echo

Line Termination
Typically, each end of the RS-485 bus must have line-terminating resistors (RS-422 terminates at the receiving end only). 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. Each switch allows customization of this interface to specific requirements. Each switch position corresponds to a specific portion of the interface. If multiple Ultra COMM+4.PCIe adapters are configured in an RS-485 network, only the boards on each end should have switches T, P & P ON. Refer to the following table for each position’s operation:

receiver circuit
5| PD| Adds or removes the 1K ohm pull-down resistor in the RS-422/RS-485 receiver circuit
6| L| Connects the TX- to RX- for RS-485 two-wire operation.
7| L| Connects the TX+ to RX+ for RS-485 two-wire operation.

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. This can be beneficial if the software can handle echoing (i.e., using received characters to throttle the transmitter) or it can confuse the system if the software does not. An RS-485 ‘No Echo’ option is selected by placing both Mode switches (M0, M1) in the ‘On’ position.

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.
• Begin by locating, selecting, and installing the correct software:
• Sealevel software for Windows and Linux operating systems is available at these links:
  • Software for Windows
  • Software for Linux
• Choose the link for the desired software package and click on the ‘Download File’ link to download the current driver.
• Proceed to the Manual Software Installation guide for your operating system

1. The setup files will automatically detect the operating environment and install the proper components. Follow the information presented on the screens that follow.

2. 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.

3. 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.

4. The software is now installed, and you can proceed with the hardware installation.
   Do not connect the hardware until the software has been successfully installed.
   To install Sealevel software, you must log in as an administrator or have administrator privileges in Windows.

5. 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.

6. 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 installing the SeaCOM software.

7. The setup file will automatically detect the operating environment and install the proper components. Next, follow the information presented on the screens that follow. Once the installation is complete, close the disk installation window.

8. Refer to the Physical Installation section to connect and install your adapter.

Upgrading to the Current SeaCOM Driver

1. Download the current driver using the Instructions from the Software Installation 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 the ‘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 and 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.

Linux Support
The 7404e is supported natively in Linux kernels 2.6.28 and later.

Technical Description

• The Ultra COMM+4.PCIe provides four RS-232/422/485 ports from a single PCIe slot.
• The Ultra COMM+4.PCIe utilizes the 16C950 type UART. This chip features programmable baud rates, data format, interrupt control, and industry-leading 128-byte transmit and receive FIFOs.
• The UARTs are registered compatible with 16C450, 16C550, 16C654, and 16C750 UARTs. The FIFO depth can be changed to match the depth of these UARTs.

RS-422/485 (CA-143 DB-9) Connector Pin Assignments

RS-232 (CA-143 DB-9) Connector Pin Assignments

• Please terminate any control signals that are not going to be used. The most common way to do this is 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.

RS-232/422/485 (DB-37)

The RTS output is only available in RS-1232 and RS-422 modes. The RTS output is tri-stated in RS-485 mode and therefore unusable. The CTS input is available in all modes.

Specifications

Environmental Specifications

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 masks over bare copper or solder mask over in nickel.

Power Consumption

Mean Time Between Failures
Greater than 150,000 hours. (Calculated)

Physical Dimensions

Appendix A – Troubleshooting

Sealevel Software is available for the Sealevel Systems adapter and will be used in the troubleshooting procedures. By using this software and following these simple steps, the most common problems can be eliminated without the need to call Technical Support.

1. 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.
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. While the Sealevel Systems adapter does allow the sharing of IRQs, many other adapters (i.e., SCSI adapters & onboard serial ports) do not. The IRQ is typically selected via an onboard 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. When running DOS or Windows 3.x refer to the supplied Sealevel Software and this User Manual to verify that the Sealevel Systems adapter is configured correctly. This software contains a diagnostic program ‘SSD’ that will verify if an adapter is configured properly. This diagnostic program is written with the user in mind and is easy to use.
6. For Windows 7 and newer versions, the diagnostic tool ‘WinSSD’ is 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 eliminate any software issues from the equation.

If these steps do not solve your problem, please call Sealevel Technical Support at +1864-843-4343. Our technical support is free and available Monday through Friday from 8:00 AM – 5:00 PM EST. For email support, contact [email protected].

Appendix B – Handling Instructions

ESD Warnings Electrostatic Discharges (ESD)

• A sudden electrostatic discharge can destroy sensitive components. Proper packaging and grounding rules must therefore be observed. Always take the following precautions: Transport boards and cards in electrostatically secure containers or bags.
• Keep electrostatically sensitive components in their containers, until they arrive at an electrostatically protected workplace.
• Only touch electrostatically sensitive components when you are properly grounded.
• Store electrostatically sensitive components in protective packaging or on anti-static mats.

Grounding Methods
The following measures help to avoid electrostatic damage to the device:

• Cover workstations with an approved antistatic material. Always wear a wrist strap connected to a properly grounded workplace.
• Use antistatic mats, heel straps, and/or air ionizers for more protection.
• Always handle electrostatically sensitive components by their edge or by their casing.
• Avoid contact with pins, leads, or circuitry.
• Turn off power and input signals before inserting and removing connectors or connecting test equipment.
• Keep the work area free of non-conductive materials such as ordinary plastic assembly aids and Styrofoam.
• Use field service tools such as cutters, screwdrivers, and vacuum cleaners that are conductive.

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 an “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-422
The RS-422 specification defines the electrical characteristics of balanced voltage digital interface circuits. RS-422 is a differential interface that defines voltage levels and driver/receiver electrical specifications. On a differential interface, logic levels are defined by the difference in voltage between a pair of outputs or inputs. In contrast, a single-ended interface, for example, RS-232, defines the logic levels as the difference in voltage between a single signal and a common ground connection. Differential interfaces are typically more immune to noise or voltage spikes that may occur on communication lines. Differential interfaces also have greater drive capabilities that allow for longer cable lengths. RS-422 is rated up to 10 Megabits per second and can have cabling 4000 feet long. RS-422 also defines driver and receiver electrical characteristics that will allow 1 driver and up to 32 receivers on the line at once. RS-422 signal levels range from 0 to +5 volts. RS-422 does not define a physical connector.

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 modes. The 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. RS-485 does not define a physical connector.

Appendix D – 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. The 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 are 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).

Appendix E – Mechanical Drawing

Appendix F – Compliance Notices

FCC Statement

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 his own 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”.
• 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.
• 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.

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. The warranty is valid only for the original purchaser and is not transferable.
• This warranty applies to Sealevel-manufactured Products. Products 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 [email protected].

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

References

• Sealevel - I/O & Computing Products, Engineering and Manufacturing
• Sealevel - I/O & Computing Products, Engineering and Manufacturing
• Software: SeaCOM - Linux - Sealevel
• Software: SeaCOM - Windows - Sealevel
• WinSSD Software Utility Overview - Sealevel

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