Impulse SIO-104 User Manual
SIO-104+2
Users Manual
Part # 3502
Sealevel Systems, Inc. Telephone: 864.843.4343
PO Box 830 Fax: 864.843.3067
Liberty, SC 29657 USA www.sealevel.com
Contents
INTRODUCTION .......................................................................................................................................................1
OVERVIEW .................................................................................................................................................1
WHAT’S INCLUDED....................................................................................................................................1
OPTIONAL ACCESSORIES............................................................................................................................1
CARD SETUP............................................................................................................................................................ 2
SWITCHES SW1A AND SW2A ...................................................................................................................2
Address Selection...................................................................................................................................2
Port Enable / Disable..............................................................................................................................2
INTERRUPT MODES ....................................................................................................................................3
HEADERS E1 AND E2 (IRQ SELECTION)....................................................................................................3
SWITCHES SW1B AND SW2B.................................................................................................................... 4
RS-485 Enable Modes (SW1B and SW2B position 1) .......................................................................... 4
Electrical Interface Selection (Positions 2 and 3)...................................................................................4
Line Termination (Position 4-9).............................................................................................................5
Typical settings for SW1B and SW2B...................................................................................................5
CLOCK MODES...........................................................................................................................................5
INSTALLATION ........................................................................................................................................................6
OPERATING SYSTEM INSTALLATION ..........................................................................................................6
Windows 95/98/ME/NT/2000/XP..........................................................................................................6
Linux ......................................................................................................................................................7
QNX....................................................................................................................................................... 7
PHYSICAL INSTALLATION........................................................................................................................... 7
TECHNICAL DESCRIPTION......................................................................................................................................8
FEATURES .................................................................................................................................................. 8
CONNECTOR PIN ASSIGNMENTS.................................................................................................................8
RS-232....................................................................................................................................................8
RS-422/485.............................................................................................................................................8
SPECIFICATIONS......................................................................................................................................................9
ENVIRONMENTAL SPECIFICATIONS ............................................................................................................9
MANUFACTURING ...................................................................................................................................... 9
POWER CONSUMPTION...............................................................................................................................9
PHYSICAL DIMENSIONS..............................................................................................................................9
APPENDIX A - TROUBLESHOOTING...................................................................................................................... 10
APPENDIX B - HOW TO GET ASSISTANCE ........................................................................................................... 11
APPENDIX C - ELECTRICAL INTERFACE.............................................................................................................. 12
RS-232 .................................................................................................................................................... 12
RS-422 .................................................................................................................................................... 12
RS-485 .................................................................................................................................................... 12
APPENDIX D - ASYNCHRONOUS COMMUNICATIONS ........................................................................................... 13
APPENDIX E - PC/104...........................................................................................................................................14
WHAT IS PC/104? ....................................................................................................................................14
APPENDIX F - SILK-SCREEN................................................................................................................................. 15
WARRANTY ...........................................................................................................................................................16
©Sealevel Systems Inc.
SL9116 Revision 7/2006
Sealevel Systems, Incorporated. All rights reserved.
Introduction
Introduction
Overview
The SIO-104+2 series provides the ultimate serial connection for your PC/104 application. The SIO-104+2 when
configured in the RS-422/485 mode provides an interface capable of long length, high-speed communications, or
when configured in the RS-232 mode provides a standard RS-232C interface that is fully compatible all popular
modem software, network operating systems software, and mouse drivers.
What’s Included
The SIO-104+2 is shipped with the following items. If any of these items are missing or damaged, contact the
supplier.
• (1) SIO-104+2 Serial Interface Adapter
• (1) Nylon Mounting Hardware Kit (PC304-NK)
• Sealevel Systems Software
Optional Accessories
• CA152 - Terminates the SIO-104+2 10 pin header to a DB9M connector.. This cable provides the standard
DB9 pin out for RS-232 (aka EIA/TIA574) and also provides the Sealevel Systems’ DB9 standard for RS422/485.
• DB103 - The DB103 is designed to convert a Sealevel DB9 Male connector to a pinout compatible with
AC24AT and AC422AT Opto-22 ISA bus cards. When used with the optional CA152 cable assembly it
allows Optomux devices to be controlled with the SIO-104+2.
• CA190 - When used with the optional CA152 cable assembly it allows connection directly to a Sony (or
compatible) 207M "9 Pin" connector.
Sealevel Systems SIO-104+2 Page 1
Card Setup
Card Setup
The SIO-104+2 contains two DIP-Switches and a jumper strap for each port, which must be set for proper
operation.
Switches SW1A and SW2A
Address Selection
Each port on the SIO-104+2 occupies eight consecutive I/O locations. A DIP-switch is used to set the base address
for these locations. SW1A sets the I/O address for port 1 and SW2A sets port 2. The following table shows the
addressing options available. If different address options are required, please contact Sealevel Systems Technical
Support about a custom PAL option.
1 2 3
3F8 On On On
2F8 On On Off
3E8 On Off On
2E8 On Off Off
2A0 Off On On
300 Off On Off
328 Off Off On
Disabled Off Off Off
Figure 1 - Address Selection Table
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.
Port Enable / Disable
Each port on the SIO-104+2 can be enabled or disabled by setting the three switches in the ‘Off’ position. The port
is enabled when a valid I/O selection is made. If any port is disabled, be sure to disable the interrupt request for that
port by removing the IRQ jumper.
Sealevel Systems SIO-104+2 Page 2
Card Setup
Interrupt Modes
DIP-Switch positions ‘S’ and ‘M’ on switches SW1A and SW2A select the interrupt mode for each port. Each port
must be set in the correct mode to insure proper operation.
With the ‘S’ selected, the adapter is in a (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 E1and E2.
‘M’ indicates the inclusion of a 1K-ohm pull-down resistor required on one port when sharing interrupts.
Set the switch to ‘S’ for shared interrupt mode on all ports sharing an IRQ. On one of the ports sharing an interrupt
set the switches for both ‘S’ and for ‘M’. This provides the pull-down resistor circuit that makes sharing IRQs
possible. If you are using more than one compatible adapter in a bus you should only have one port set to ‘M’.
Headers E1 and E2 (IRQ Selection)
The SIO-104+2 has two interrupt selection jumpers, which should be set prior to use, if an interrupt is required by
your application software. Consult the user manual for the application software being used to determine the proper
setting.
3 4 5 7 9 10111215
Figure 2 - Header E1 and E2, IRQ Selection (IRQ 3 shown selected)
Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting at header E1 and
E1 and setting the appropriate selections at SW1A and SW2A.
Sealevel Systems SIO-104+2 Page 3
Card Setup
Switches SW1B and SW2B
RS-485 Enable Modes (SW1B and SW2B position 1)
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 SIO-104+2 is the ability to be RS-485 compatible without the need for special
software or drivers. This ability is especially useful in Windows, Windows NT, and OS/2 environments where the
lower level I/O control is abstracted from the applicatio n program. This ability means that the user can effectively
use the SIO-104+2 in an RS-485 application with existing (i.e. standard RS-232) software drivers.
DIP-Switch SW2A and SW2B are used to control the RS-485 mode functions for the driver circuit. The selections
are:
‘Auto’ enable (Switch position 1 ‘Off’). The ‘Auto’ enable feature automatically enables/disables the RS-485
interface via on board circuitry.
‘RTS’ enable (Switch position 1 ‘On’) The ‘RTS’ mode uses the ‘RTS’ modem control signal to enable the RS-485
interface and provides backward compatibility with existing software products.
Electrical Interface Selection (Positions 2 and 3)
Positions 2 and 3 select the Electrical Interface for the SIO-104+2, the following table represents the only valid
options:
Mode M0 M1
RS232 OFF OFF
RS422 OFF ON
RS485 with echo ON OFF
RS485 no echo ON ON
Sealevel Systems SIO-104+2 Page 4
Loading...