SeaLevel VERSA COMM +4 User manual

VERSA COMM +4

User Manual | 3410

Contents

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

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

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

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

PHYSICAL INSTALLATION..................................................................................................................................9

SOFTWARE INSTALLATION..............................................................................................................................10

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

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

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

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

APPENDIX C – ELECTRICAL INTERFACE ........................................................................................................15

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

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

APPENDIX F - SCHEMATIC ...............................................................................................................................18

APPENDIX G – COMPLIANCE NOTICES ..........................................................................................................19

WARRANTY ........................................................................................................................................................20

Introduction

Overview

The Sealevel Systems VERSA COMM+4 provides the PC with four RS-232 asynchronous ports. The VERSA

COMM+4 allows for connection to any device utilizing the RS-232 electrical interface, such as modems,

data-entry terminals, and plotters.

Factory Default Settings

The VERSA COMM+4 factory default settings are as follows:

Port #

Base Address

IRQ

Port 1

3F8

Port 2

2F8

Port 3

3E8

Port 4

2E8

To install the VERSA COMM+4 using factory default settings, refer to the Installation section of this

manual.

For your reference, record installed VERSA COMM+4 settings below:

Port #

Base Address

IRQ

Port 1

Port 2

Port 3

Port 4

Before You Get Started

What’s Included

The VERSA COMM+4 is shipped with the following items. If any of these items are missing or damaged,

contact the supplier.

•VERSA COMM+4 Serial I/O Adapter

•“Spider” Cable providing 4 DB-25 connectors.

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

The VERSA COMM+4 contains several jumper straps which must be set for proper operation.

Address Selection

Each port on the VERSA COMM+4 occupies 8 consecutive I/O locations. A DIP-switch is used to set the

base address for these locations. Be careful when selecting the base address as some selections conflict

with existing ports. The following table shows several examples that typically do not cause a conflict. SW4

sets the I/O address for port 1, SW3 sets the address for port 2, SW2 sets the address for port 3 and SW1

sets the address for port 4.

Address Binary Switch Position Setting

Hex A9 A0 1 2 3 4 5 6 7

280-287 1010000XXX Off On Off On On On On

2A0-2A7 1010100XXX Off On Off On Off On On

2E8-2EF 1011101XXX Off On Off Off Off On Off

2F8-2FF 1011111XXX Off On Off Off Off Off Off

3E8-3EF 1111101XXX Off Off Off Off Off On Off

300-307 1100000XXX Off Off On On On On On

328-32F 1100101XXX Off Off On On Off On Off

3F8-3FF 1111111XXX Off Off Off Off Off Off Off

Figure 1 - Address Selection Table

The following illustration shows the correlation between the DIP-switch setting and the address bits used

to determine the base address. In the example below, address 300 is selected as a base. Address 300 in

binary is XX11 0000 0XXX where X = a non-selectable address bit.

Figure 2 - DIP-Switch Illustration

Setting the switch “On” or “Closed” corresponds to a “0” in the address, while leaving it “Off” or

“Open” corresponds to a “1”.

Refer to Appendix A for common address contentions.

Port Enable / Disable

Each port on the VERSA COMM+4 can be enabled or disabled with switch position 8 on the DIP-switch.

The port is enabled with the switch "On" or "Closed" and disabled when "Off" or "Open". If any port is

disabled, be sure to disable the interrupt request for that port by removing the IRQ jumper.

IRQ Selection

Headers E1, E2, E3 and E4 select the IRQ for each serial port. If COM1: is selected, this jumper must be on

the IRQ4 setting. If COM2: is selected, this jumper must be on IRQ3.

E4 - Port1

E3 - Port2

E2 - Port3

E1 - Port4

Figure 3 - Headers E1, E2, E3, and E4 (Factory Default)

Most communications software applications default COM3: to IRQ4 and COM4: to IRQ3. This requires

the sharing of interrupts between COM1: and COM3:, and between COM2: and COM4:. While this is

the default, it is not always the preferred setting. Check your software configuration instructions to

determine the most appropriate IRQ selection

Interrupt Mode Options

Header E5 selects the interrupt mode for each port. Each port must be set in the correct mode to insure

proper installation.

"N" indicates the (N)ormal, single interrupt per port mode. "S" Indicates the (S)hared interrupt mode, which

allows more than one port to access a single IRQ. Any two or more ports can share a common IRQ by

placing the jumpers on the same IRQ setting and setting the appropriate selections at E5. Consult your

particular software for IRQ selection. If no interrupt is desired, remove the jumper. "M" indicates the

inclusion of a 1K ohm pulldown resistor required on one port when sharing interrupts.

1 2

3 4

Figure 4 - Header E5, Normal IRQ Mode

Set jumpers to "S" for shared interrupt mode on all blocks sharing an IRQ except one. Set that port block

for "M". This provides the pull-down resistor circuit that makes sharing of IRQs possible. If you are using

more than one VERSA COMM+4 or a compatible card in a bus you should only have one port set to "M".

The following example shows all four ports sharing a single IRQ.

1 2

3 4

Figure 5 - Header E5, Shared IRQ Mode

Set jumper to "S" if you are using more than one VERSA COMM+4 in a bus or you wish to completely remove

the pull-down resistor for hardware compatibility. Setting the board in this configuration when it is not

accompanied by a pull-down resistor will prevent the ports from triggering an interrupt.

1 2

3 4

Figure 6 - Header E5, Sharing IRQ’s with another adapter

E4 - Port1

1 2 M

SE3 - Port2

3 4E2 - Port3

E1 - Port4

Figure 7 - IRQ Headers E1 - E5 (Factory Default)

The above example shows the correlation between jumper block E5 and the interrupt jumpers (E1-E4). This

example shows the VERSA COMM+4 shipping configuration with COM1: & COM3: sharing interrupt 4 and

COM2: & COM4: sharing interrupt 3.

Physical Installation

The VERSA COMM+4 can be installed in any of the PC expansion slots, but to access the “AT” or (E)ISA

IRQ’s (10, 11, 12, 15) it must be installed in one of the 16 bit slots. The VERSA COMM+4 contains several

jumper straps for each port which must be set for proper operation prior to installing the card into the

computer.

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

2. Remove the PC case cover.

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

4. Gently insert the VERSA COMM+4 into the slot. Make sure that the adapter is seated properly.

5. Replace the screw.

6. Install the “Spider” Cable

7. Replace the cover.

8. Connect the power cord.

Installation is complete.

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 legacy driver download and installation instructions.

1. Begin by locating, selecting, and installing the SeaCOM Asynchronous Serial Software

Suite from Sealevel’s website.

2. Select the “Download SeaCOM for Windows.”

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

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

4. 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.

5. 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.

6. 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.

For additional software support, 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.

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