SeaLevel Ultra 485.OPT022 Bedienungsanleitung

Ultra 485.OPT022

User Manual | 7105-DB9

Contents

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

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

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

CARD SETUP........................................................................................................................................................................................................................5

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

HARDWARE INSTALLATION............................................................................................................................................................................................10

TECHNICAL DESCRIPTION...............................................................................................................................................................................................11

SPECIFICATIONS...............................................................................................................................................................................................................12

APPENDIX A –TROUBLESHOOTING.............................................................................................................................................................................13

APPENDIX B –HOW TO GET ASSISTANCE..................................................................................................................................................................14

APPENDIX C –ELECTRICAL INTERFACES....................................................................................................................................................................15

APPENDIX D –ASYNCHRONOUS COMMUNICATIONS.............................................................................................................................................16

APPENDIX E –SILK SCREEN ...........................................................................................................................................................................................17

APPENDIX F –COMPLIANCE NOTICES.........................................................................................................................................................................18

WARRANTY ........................................................................................................................................................................................................................19

Introduction

Overview

The PCI bus 7105-DB9 is designed with a DB9 connector compatible with the AC24AT and AC422AT Opto-

22 ISA bus cards. This allows Optomux devices to be controlled from PCs that do not have an ISA bus

expansion slot available. The 7105-DB9 provides a single field selectable port configurable as RS-422/485

supporting asynchronous data rates up to 460.8K bps.

Choose the RS-422 mode for long distance device connections up to 4000ft. where noise immunity and

high data integrity are essential. Select RS-485 and capture data from multiple peripherals in a RS-485 multi-

drop network. Up to 31 RS-485 devices can be connected to each port to automate your data collection.

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 485.OPTO22 is shipped with the following items. If any of these items is missing or damaged,

contact the supplier.

•ULTRA 485.OPTO22 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.

Card Setup

RS-485 Enable Modes

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 485.OPTO22 is the ability to be RS-485 compatible without the

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

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

the ULTRA 485.OPTO22 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:

‘Auto’ enable (silk-screen ‘AT’). The ‘Auto’ enable feature automatically enables/disables the RS-485

interface via on board circuitry.

‘RTS’ enable (silk-screen ‘RT’) The ‘RTS’ mode uses the ‘RTS’ modem control signal to enable the RS-485

interface and provides backward compatibility with existing software products.

‘No Echo’ (silk-screen ‘NE’) is used to control the RS-485 enable/disable functions for the receiver based

on the state of the RS-422/485 transmitter. 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. To select the ‘No Echo’ mode select silk-screen position ‘NE’.

Clock Modes

The ULTRA 485.OPTO22 employs a unique clocking option that allows the end user to select from divide

by 4 and divide by 1 clocking modes. SW2 positions 1 and 2 select the Divide by 1 (silk-screen D1) and

divide by 4 (silk-screen D4) modes.

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

Bps), set switch SW2 in the divide by 4 mode (silk-screen D4).

To select data rates up to the maximum of 460.8K bps, set switch SW2 in the divide by 1 (silk-screen D1)

position. Please refer to the following page for these additional data rates.

Do not set both switches on or invalid clocking will occur.

CARD SETUP, CONTINUED

RS-485 Mode and Clock Mode Examples (Switch SW2)

Figure 1- Switch SW2, RS-422, Divide by 4

Figure 2 –Switch SW2, RS-485 ‘Auto’ Enabled, with ‘No Echo’ Divide by 4

Figure 3 - Switch SW2, RS-485 ‘Auto’ Enabled, with ‘Echo’ Divide by 4

1 2 3 4

OFF 5

1 2 3 4

OFF 5

1 2 3 4

OFF 5

CARD SETUP, CONTINUED

Baud Rates and Divisors for the ‘Div1’ mode

The following table shows some common data rates and the rates you should choose to achieve them if

using the adapter in the ‘Div1’ mode. Windows 95/98/ME/2000/NT/XP defaults the oscillator value to

1.8432 MHz (Div4). This is suitable for traditional serial communication needs and provides for a maximum

data rate of 115.2 Kbps. The oscillator value 7.3728 MHz (Div1) may be entered into either the ‘Advanced

Tab’ on 95/98/Me/2000/XP Device Manager applet or in the ‘Advanced Ports’ applet in the NT Control

Panel. This will allow easy selection of typical baud rates up to the maximum data rate of 460.8Kbps.

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

57.6 K bps

460.8K bps

115.2 K 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

CARD SETUP, CONTINUED

Address and IRQ selection

The ULTRA 485.OPTO22 is automatically assigned resources by your motherboard BIOS and or the

operating system.

Adding or removing other hardware or moving the adapter to a different PCI slot may change the

assignment of I/O addresses and IRQs.

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. Switch SW1 allows customization of this interface to specific

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

ULTRA 485.OPTO22 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:

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.

Figure 4 - Switch SW1, Line Termination

1 2 3 4

OFF 5

P P T L L

SeaCOM Software Installation

Windows 98/ME/2000/XP/Vista™ Operating Systems

Operating System Installation

For Windows Users

Begin by locating, selecting, and installing the SeaCOM software from the Sealevel software driver database.

SeaCOM software can also be downloaded from the 7105-DB9-product webpage: Ultra 485.Opto22

Other Operating Systems

Refer to the appropriate section of the Serial Utilities Software.

LINUX INSTALLATION

Refer to 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. The SeaCOM for Linux v7.3.2 can be downloaded from Sealevel’s

website (Software: SeaCOM - Linux - Sealevel).

For additional 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: mailto:sup[email protected]om.

To install Sealevel Systems software, you must log in as an administrator or have administrator

privileges in Windows.

Hardware Installation

The adapter can be installed in any 5V PCI expansion slot.

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

1. Turn off PC power. Disconnect the power cord.

2. Remove the PC case cover.

3. Locate an available 5V PCI slot and remove the blank metal slot cover.

4. Gently insert the PCI adapter into the slot. Make sure that the adapter is seated properly.

5. After the adapter has been installed, the cables should be routed thru the opening in the

bracket. This bracket also features a strain relief function that should be used to prevent un-

expected cable removal.

6. Replace the screw you removed for the blank and use it to secure the adapter into the slot.

(This is required to ensure FCC Part 15 compliance.)

7. Replace the cover.

8. Connect the power cord

Installation is finished.

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