SeaLevel ULTRA COMM+I.PCI 7103 Manuale utente

ULTRA COMM+I.PCI™

User Manual | 7103

Contents

CONTENTS...........................................................................................................................................................2

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

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

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

INSTALLATION ..................................................................................................................................................10

HARDWARE INSTALLATION .............................................................................................................................11

TECHNICAL DESCRIPTION ...............................................................................................................................12

SPECIFICATIONS ...............................................................................................................................................13

APPENDIX A –TROUBLESHOOTING................................................................................................................14

APPENDIX B –HOW TO GET ASSISTANCE .....................................................................................................15

APPENDIX C –ELECTRICAL INTERFACE ........................................................................................................16

APPENDIX D –GROUND LOOP PHENOMENON..............................................................................................18

APPENDIX E - ASYNCHRONOUS COMMUNICATIONS....................................................................................19

APPENDIX F - SILK SCREEN..............................................................................................................................20

APPENDIX G - COMPLIANCE NOTICES............................................................................................................21

WARRANTY ........................................................................................................................................................22

Introduction

The Sealevel Systems ULTRA COMM+I.PCI is a single channel isolated PCI Bus serial I/O adapter for the

PC and compatibles. Utilizing the Exar 16C850 UART with its industry leading 128 byte FIFOs, it provides a

field selectable RS-232/422/485 serial port supporting data rates up to 460.8K bps (RS-422/485).

Configure as RS-232 for standard serial COM: port requirements. Choose the RS-422 mode for long

distance device connections up to 5000ft. where noise immunity and high data integrity are essential.

Select RS-485 and capture data from multiple peripherals in a RS-485 multidrop network. Up to 31 RS-485

devices can be connected to each port to automate your data collection. You can even mix the ports in any

of the interface combinations to provide maximum flexibility to your application. Optional Terminal Block

adapters are available to simplify field-wiring connections.

In both RS-232 and RS-422 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.

Before You Get Started

What’s Included

The ULTRA COMM+I.PCI is shipped with the following items. If any of these items are missing or damaged,

please contact Sealevel for replacement.

•ULTRA COMM+I.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.

Factory Default Settings

The ULTRA COMM+I.PCI factory default settings are as follows:

Port #

Electrical Specification

Port 1

RS-422

To install the ULTRA COMM+I.PCI using factory default settings, refer to Installation.

Card Setup

Electrical Interface Selection

The ULTRA COMM+I.PCI has the ability to be used as RS-232, RS-422 or RS-485. This is selectable via DIP-

switches, SW1. Please use the following examples to configure your adapter.

Figure 1 - RS-232

Figure 2 –RS-422

Figure 3 –RS-485, 4-Wire with Echo

Figure 4 - RS-485, 2-wire with Echo

Figure 5 - RS-485, 2-wire without Echo

1 2 3 4 5 6 7

OFF 8 9 10

1 2 3 T P P L L E

RS-232

1 2 3 4 5 6 7

OFF 8 9 10

1 2 3 T P P L L E

RS-422

1 2 3 4 5 6 7

OFF 8 9 10

1 2 3 T P P L L E

4-Wire

RS-485

W/Echo

1 2 3 4 5 6 7

OFF 8 9 10

1 2 3 T P P L L E

2-Wire

RS-485

W/Echo

1 2 3 4 5 6 7

OFF 8 9 10

1 2 3 T P P L L E

2-Wire

RS-485

NO Echo

Card Setup, Continued

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. Switches SW1 and SW2 allow the user to customize this

interface to their specific requirements. Each switch position corresponds to a specific portion of the

interface. If multiple ULTRA COMM+I.PCI adapters are configured in a RS-485 network, only the boards on

each end should have jumpers T, P & P ON. Refer to the following table for each position’s operation:

Name

Function

Adds or removes the 120 ohm termination.

Adds or removes the 1K ohm pull-down resistor in the RS-422/RS-

485 receiver circuit (Receive data only).

Adds or removes the 1K ohm pull-up resistor in the RS-422/RS-

485 receiver circuit (Receive data only).

Connects the TX+ to RX+ for RS-485 two wire operation.

Connects the TX- to RX- for RS-485 two wire operation.

RS-485 Enable Mode

RS-485 is ideal for multi-drop or network environments. RS-485 requires a tri-state driver that will allow the

electrical presence of the driver to be removed from the line. The driver is in a tri-state or high impedance

condition when this occurs. Only one driver may be active at a time and the other driver(s) must be tri-

stated. The output modem control signal Request To Send (RTS) is typically used to control the state of

the driver. Some communication software packages refer to RS-485 as RTS enable or RTS block mode

transfer.

One of the unique features of the ULTRA COMM+I.PCI is the ability to be RS-485 compatible without the

need for special software or drivers. This ability is especially useful in Operating Systems where the lower

level I/O control is abstracted from the application program. This ability means that the user can effectively

use the ULTRA COMM+I.PCI in an RS-485 application with existing (i.e., standard RS-232) software drivers.

Switch SW2 is used to control the RS-485 mode functions for the driver circuit. The selections are ‘RTS’

enable (silk-screen ‘RT’ switch position 4), or ‘Auto’ enable (silk-screen ‘AT’ switch position 3). The ‘Auto’

enable feature automatically enables/disables the RS-485 interface. The ‘RTS’ mode uses the ‘RTS’ modem

control signal to enable the RS-485 interface and provides backward compatibility with existing software

products.

Card Setup, Continued

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.

Position 9 of SW1 is used to control the RS-485 enable/disable functions for the receiver circuit. To select

the ‘No Echo’ mode place switch position 9 to the ‘On’ position (see Figure 5).

Figure 6 - RS-485 Enable modes

Clock Modes

The ULTRA COMM+I.PCI employs a unique clocking option that allows the end user to select from divide

by 4 and divide by 1 clocking modes. These modes are selected at switches SW-2.

To select the Baud rates commonly associated with COM: ports (i.e., 2400, 4800, 9600, 19.2, … 115.2K Bps)

set switch position 2 to the ‘On’ position (silk-screen D4). To select the maximum data rate (460.8K bps)

set switch position 1 to the ‘On’ position (silk-screen D1).

Figure 7 - Clocking Modes

1 2 3 4

OFF

SW2

RS-232/422

Default 1 2 3 4

OFF

SW2

RS-485

Auto

Enabled

1 2 3 4

OFF

SW2

Divide by

1 mode

Divide by

4 mode

1 2 3 4

OFF

SW2

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

19.2K bps

4800 bps

57.6 K bps

14.4K bps

115.2 K bps

28.8K bps

230.4K bps

57.6K bps

460.8K 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

384

2400 bps

192

4800 bps

9600 bps

19.2K bps

38.4K bps

57.6K bps

115.2K bps

230.4K bps

460.8K bps

Installation

Software Installation

Microsoft Windows XP/Vista/Windows 7™ Operating Systems

Do not install the adapter until the software has been successfully installed.

1. Begin by locating, selecting, and installing the correct software (SeaCOM Software) from the

Sealevel’s software database: Sealevel Driver Downloads & Software.Select SeaCOM software for

Windows. Select SeaCOM for Windows v3.7.5 in Downloads.

2. The setup files will automatically detect the operating environment and install the proper

components. Follow the information presented on the screens that follow.

3. 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.

4. 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.

5. The software is now installed, and you can proceed with the hardware installation.

Other Operating Systems

Refer to the appropriate section of the Serial Utilities Software.

LINUX INSTALLATION

Refer to the Linux Archives - Sealevel. This link contains valuable information on installing your serial

adapter in the various Linux releases. Also included is a series of files explaining proper Linux syntax and

typical Linux serial implementations.

QNX

For the most up to date information on the QNX4 and QNX6 software support, please call Sealevel Systems’

Technical Support, (864) 843-4343. Our technical support is free and available from 8:00AM-5PM Eastern

Time, Monday through Friday. For email support contact: support@sealevel.com.

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