SeaLevel UltraCOMM+4.PCIe User manual

Sealevel Systems, Inc.

Sealevel.com

Phone 864.843.4343

UltraCOMM+4.PCIe

User Manual

Item# 7404e

©Sealevel Systems, Inc. 7404e Manual 2

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Contents

INTRODUCTION ...................................................................................................................................................................3

BEFORE YOU GET STARTED............................................................................................................................................. 4

CARD SETUP ........................................................................................................................................................................ 6

SOFTWARE INSTALLATION................................................................................................................................................ 9

SPECIFICATIONS ............................................................................................................................................................... 17

APPENDIX A-TROUBLESHOOTING.............................................................................................................................. 18

APPENDIX B-HANDLING INSTRUCTIONS .................................................................................................................. 19

APPENDIX C-ELECTRICAL INTERFACE....................................................................................................................... 20

APPENDIX D-ASYNCHRONOUS COMMUNICATIONS............................................................................................... 22

APPENDIX E–MECHANICAL DRAWING ...................................................................................................................... 23

WARRANTY ....................................................................................................................................................................... 24

©Sealevel Systems, Inc. 7404e Manual 3

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Introduction

The Sealevel Ultra COMM+4.PCIe is an 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 RS485 ports to be viewed by the

operating system as a COM: port. This allows the software application to utilize the serial port

for RS485 communication without the need to control the direction of data between the master

and slave device. Our on-board 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 prescalar support wide range of baud rates

•Supports 9-bit protocol framing

•Each port supports data rates to 921.6K bps

•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)

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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

•Sealevel Software CD

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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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)

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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

a 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

them 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

19.2K bps 1.5 136

38.4K bps 1.75 588

57.6K bps 1.825 37

115.2K bps 1.875 18

230.4K bps 1 17

460.8K bps 2.125 4

921.6K bps 2.125 2

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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 receive 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:

Switch Name Function

3 T Adds or removes the 120 ohm termination.

4 PU Adds or removes the 1K ohm pull-up resistor in the RS-422/RS-485 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.

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Figure 1 - RS-232 Mode

Figure 2 - RS-422 Mode

Figure 3 - RS-485 two-wire with 'Echo'

Figure 4 - RS-485 two-wire No 'Echo'

1234567

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Software Installation

This section contains helpful information pertaining to the installation of supported Sealevel

Systems, Inc. software packages. First, the process of acquiring the software is discussed.

Next, the installation is detailed in a step-by-step guide for Windows and Linux operating

systems.

Where to Get Sealevel Software

All Sealevel products are shipped with media containing the installers for each software

package available. If the media is otherwise unavailable or if desired, the current versions of

Sealevel software packages can be obtained from the Sealevel website (see following

instructions). If you already have the Sealevel software, proceed to the Windows or Linux

installation section.

•Sealevel software for Windows and Linux operating systems is available at these links:

oSoftware for Windows

oSoftware 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.

Windows 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.

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Guided Software Installation

1. Insert the Sealevel media into your PC.

2. If the ‘AutoRun’ feature is enabled for this media the software will automatically

launch.

3. Otherwise, navigate to the root directory of the media and double-click the

‘autorun.exe’ application to launch the installation window.

4. Select ‘Install’ as demonstrated in the image below.

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