Impulse 3405 User Manual

VERSA COMM+4/EX™

USER MANUAL

Part #3405

Sealevel Systems, Inc. Telephone: [phone]
PO Box 830 Fax: [phone]

Liberty, SC 29657 USA www.sealevel.com

Contents

INTRODUCTION ........................................................................ 1

OVERVIEW......................................................................................1

WHAT’S INCLUDED.........................................................................1

FACTORY DEFAULT SETTINGS ........................................................1

CARD SETUP ............................................................................ 2

ADDRESS SELECTION......................................................................2

JUMPER SELECTIONS ......................................................................4

IRQ Selection..............................................................................4

INTERRUPT MODES.........................................................................5

CLOCK MODES ...............................................................................6

BAUD RATES AND DIVISORS FOR THE ‘DIV1’ MODE .......................7

BAUD RATES AND DIVISORS FOR THE ‘DIV2’ MODE .......................8

INSTALLATION ......................................................................... 9

OPERATING SYSTEM INSTALLATION ...............................................9

For Windows Users.....................................................................9

Other Operating Systems ............................................................9

SYSTEM INSTALLATION ..................................................................9

TECHNICAL DESCRIPTION .................................................... 10

FEATURES.....................................................................................10

INTERRUPT STATUS PORT.............................................................10

CONNECTOR PIN ASSIGNMENTS....................................................11

DB-25 Male (RS-232 DTE)......................................................11

DB-9 Male (EIA-574 DTE)......................................................11

DB-37 Male ..............................................................................12

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

ENVIRONMENTAL SPECIFICATIONS ...............................................13

MANUFACTURING.........................................................................13

POWER CONSUMPTION .................................................................13

MEAN TIME BETWEEN FAILURES (MTBF) ...................................13

PHYSICAL DIMENSIONS.................................................................13

PPENDIX A - TROUBLESHOOTING ...................................... 14

A

A

PPENDIX B - HOW TO GET ASSISTANCE............................ 16

APPENDIX C - ELECTRICAL INTERFACE .............................. 17

RS-232.........................................................................................17

PPENDIX D - ASYNCHRONOUS COMMUNICATIONS ............ 18

A

APPENDIX E - SILK-SCREEN ................................................. 19

APPENDIX F - SCHEMATIC .................................................... 20

APPENDIX G - COMPLIANCE NOTICES ................................. 22

FEDERAL COMMUNICATIONS COMMISSION STATEMENT...............22

EMC DIRECTIVE STATEMENT ......................................................22

WARRANTY............................................................................ 23

Figures

Figure 1 - Available Address Combinations ............................................2

Figure 2 - Address Selection Table ...........................................................3

Figure 3 - Port to Connector Table ..........................................................3

Figure 4 – Headers J1B – J4B, IRQ Selection.........................................4

Figure 5 - Header J1A, Normal IRQ Mode .............................................5

Figure 6 - Header J1A & J2A, Shared IRQ Mode..................................5

Figure 7 - Clocking Mode ‘Divide By 4’...................................................6

Figure 8 - Clocking Mode ‘Divide By 2’...................................................6

Figure 9 - Clocking Mode ‘Divide By 1’...................................................6

Figure 10 - Asynchronous Communications Bit Diagram....................18

© Sealevel Systems, Inc.
SL9144 Revision 7/2006
Sealevel Systems, Incorporated. All rights reserved.

Introduction

Introduction

Overview

The Sealevel Systems VERSA COMM+4/EX provides the PC with four
RS-232 asynchronous ports. The VERSA COMM+4/EX allows for connection
to any device utilizing the RS-232 electrical interface, such as modems,
data-entry terminals, and plotters.

What’s Included

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

• VERSA COMM+4/EX Serial I/O Adapter

• DB-37 to four DB-25 ‘Spider Cable’ (DB-9 Spider Cable is

available)

• Sealevel Software

Factory Default Settings

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

Port # Base Address IRQ IRQ Mode Clock Divisor

Port 1 280 5 M 4
Port 2 288 5 S 4
Port 3 290 5 S 4
Port 4 298 5 S 4

To install the VERSA COMM+4/EX using factory default settings, refer to
Installation on page 9.

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

Port # Base Address IRQ IRQ Mode Clock Divisor

Port 1
Port 2
Port 3
Port 4

Sealevel Systems VERSA COMM+4/EX Page 1

Card Setup

Card Setup

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

Address Selection

Each port on the VERSA COMM+4/EX occupies eight consecutive I/O
locations. A DIP-switch is used to set the base address for these locations.

The VERSA COMM+4/EX has a unique addressing scheme that allows it to be
completely compatible with Sealevel Systems’ older four port RS-232 interface
adapters (p/n 3064, 3065, 3066 and 3400) and provides the ability to select
specific non-linear address combinations (i.e. 3F8, 2F8, 3E8, 2E8).

The first addressing scheme allows the user to select the addresses for its ports
from a table of available address combinations.

The following table shows the addressing combinations available. If different
address combinations are required, please contact Sealevel Systems Technical
Support about custom PAL options.

Switch 6 Switch 7 Switch 8 Port 1 Port 2 Port 3 Port 4

On On Off 3F8 2F8 3E8 2E8
On Off On 2F8 3E8 2E8 2E0

On Off Off 3E8 2E8 280 288
Off On On 500 508 510 518
Off On Off 580 588 590 598
Off Off On 1500 1508 1510 1518
Off Off Off 3220 3228 4220 4228

On On On Addresses set up by switches 1 - 5

Figure 1 - Available Address Combinations

Note: Each COM: port in the system should have a unique address. Typically

COM1: - COM4: addresses are 3F8, 2F8, 3E8 and 2E8 Hex.

Refer to Appendix A for common address contentions.

Sealevel Systems VERSA COMM+4/EX Page 2

Card Setup

The second mode of address selection provides the compatibility mode. In this
mode the DIP-switch sets the base address and the adapter occupies 32
consecutive I/O locations. The following table illustrates the location of each
port and its relationship to the other ports.

Note: For switches 1 - 5 to become active, switches 6, 7 & 8 must be set in
the ‘On’ or ‘Up’ position.

Switch Settings

Address lines Æ A9 A8 A7 A6 A5

Address Selected 1 2 3 4 5

280-29F Off On Off On On

2A0-2BF Off On Off On Off

380-39F Off Off Off On On

1A0-1BF On Off Off On Off

2E0-2FF Off On Off Off Off

Figure 2 - 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 2E0 is selected as a base. Address 2E0 in binary is XX 10 111X XXXX
where X = a non-selectable address bit.

A9 A5

ON

OFF

1 2 3 4 5 6 7 8

Port # Connector Location Address Example (Base=2E0)

1
2
3
4

Sealevel Systems VERSA COMM+4/EX Page 3

1 Base+0 2E0-2E7
2 Base+8 2E8-2EF
3 Base+16 2F0-2F7
4 Base+24 2F8-2FF

Figure 3 - Port to Connector Table

Card Setup

Jumper Selections

For ease of configuration, the headers are grouped by port. Port one headers
have a ‘J1’ prefix, Port two headers have the ‘J2’ prefix, etc. For example, the
header that controls the Port one IRQ selection is J1B, the header that controls
the Port 2 IRQ selection is J2B. The silk-screen also provides information for
configuring the adapter without the use of the manual. This is particularly useful
in field re-configuration.

IRQ Selection

Headers J1B through J4B select the interrupt request for each serial port. If
COM1: is selected, the corresponding jumper must be on the IRQ4 setting. If
COM2: is selected, the corresponding jumper must be on IRQ3. (This only
applies to the traditional DOS COM: port assignments, in Windows COM1: can
use I/O address 300 and IRQ15 if it is available!)

34567 101112159

Figure 4 – Headers J1B – J4B, IRQ Selection

Note: Most DOS 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.

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 J1A through J4A.
When sharing IRQs, many operating systems (i.e. Windows NT) will require the
location of the Interrupt Status Port (ISP). Please see Page 10 for a description
of the ISP and how it is used.

Sealevel Systems VERSA COMM+4/EX Page 4

Card Setup

Interrupt Modes

Headers J1A through J4A select the interrupt modes for each port. Each port
must be set in the correct mode to insure proper operation.

‘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. ‘M’ indicates the inclusion of a 1K ohm pull-down resistor required on one
port when sharing interrupts.

J1A

NM

Figure 5 - Header J1A, Normal IRQ Mode

Set the 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 IRQs possible. If you are using more than one
VERSA COMM+4/EX or a compatible adapter in a bus you should only have
one port set to ‘M’. The following example shows two ports sharing a single
IRQ.

S

J1A

NSM

J2A

NSM

Figure 6 - Header J1A & J2A, Shared IRQ Mode

Set the jumper to ‘S’ if you are using more than one VERSA COMM+4/EX in
a bus or to completely remove the pull-down resistor for hardware compatibility.

Setting the adapter in this configuration when it is not accompanied by a
pull-down resistor will prevent the ports from triggering an interrupt.

Sealevel Systems VERSA COMM+4/EX Page 5