Impulse 7402 User Manual
ULTRA COMM+422.PCI
USER MANUAL
TM
Sealevel Systems, Inc
P.O. Box 830
Liberty, SC 29657 USA
Part # 7402
Phone: (864) 843-4343
FAX: (864) 843-3067
www.sealevel.com
Contents
INTRODUCTION ........................................................................ 1
OVERVIEW......................................................................................1
WHAT’S INCLUDED.........................................................................1
FACTORY DEFAULT SETTINGS ........................................................1
CARD SETUP ............................................................................ 2
RS-485 ENABLE MODES ................................................................2
Interface Mode Examples J1B –J4B (continued)........................4
ADDRESS AND IRQ SELECTION.......................................................4
LINE TERMINATION ........................................................................5
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
Interrupts...................................................................................10
WHY USE AN ISP? ........................................................................11
CONNECTOR PIN ASSIGNMENTS....................................................12
RS-422/485 (DB 9 Male)......................................................12
DB-37 Connector Pin Assignments ..........................................12
SPECIFICATIONS .................................................................... 13
ENVIRONMENTAL SPECIFICATIONS ...............................................13
MANUFACTURING.........................................................................13
POWER CONSUMPTION .................................................................13
MEAN TIME BETWEEN FAILURES (MTBF) ...................................13
PHYSICAL DIMENSIONS.................................................................13
APPENDIX A - TROUBLESHOOTING ...................................... 14
PCI COM NUMBER SELECTION IN WINDOWS 95/98 ........15
APPENDIX B - HOW TO GET ASSISTANCE............................ 16
APPENDIX C - ELECTRICAL INTERFACE .............................. 17
RS-422.........................................................................................17
RS-485.........................................................................................17
PPENDIX D - ASYNCHRONOUS COMMUNICATIONS ............ 18
A
APPENDIX E - SILK-SCREEN ................................................. 19
APPENDIX F - COMPLIANCE NOTICES .................................. 20
FEDERAL COMMUNICATIONS COMMISSION STATEMENT...............20
EMC DIRECTIVE STATEMENT ......................................................20
WARRANTY............................................................................ 21
Figures
Figure 1- Headers J1B – J4B, RS-422 ......................................................3
Figure 2 - Headers J1B – J4B, RS-485 ‘Auto’ Enabled, with ‘No Echo’3
Figure 3 - Headers J1B – J4B, RS-485 ‘Auto’ Enabled, with ‘Echo’ ....3
Figure 4 - Headers J1B – J4B, RS-485 ‘RTS’ Enabled, with ‘No Echo’4
Figure 5 - Headers J1B – J4B, RS-485 ‘RTS’ Enabled, with ‘Echo’.....4
Figure 6 - Headers J1A – J4A, Line Termination...................................5
Figure 7 - Clocking Mode 'Divide By 4’...................................................6
Figure 8 - Clocking Mode 'Divide By 2’...................................................6
Figure 9 - Asynchronous Communications Bit Diagram......................18
© Sealevel Systems, Inc.
SL9063 Revision 7/2006
Sealevel Systems, Incorporated. All rights reserved.
Introduction
Introduction
Overview
The Sealevel ULTRA COMM+422.PCI is a four channel PCI Bus serial I/O
adapter for the PC and compatibles supporting data rates up to 460.8K bps.
RS-422 provides excellent communications 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 multidrop
network.
In both RS-485 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
What’s Included
The ULTRA COMM+422.PCI is shipped with the following items. If any of
these items are missing or damaged, contact the supplier.
• ULTRA COMM+422.PCI Serial I/O Adapter
• Serial Utility Software
• “Spider” Cable providing 4 DB-9 connectors
• User Manual
Factory Default Settings
The ULTRA COMM+422.PCI factory default settings are as follows:
Port # Clock DIV Mode Enable Mode
Port 1 4 Auto
Port 2 4 Auto
Port 3 4 Auto
Port 4 4 Auto
To install the ULTRA COMM+422.PCI using factory default settings, refer to
Installation on page 9.
For your reference, record installed ULTRA COMM+422.PCI settings below:
Port # Clock DIV Mode Enable Mode
Port 1
Port 2
Port 3
Port 4
Sealevel Systems ULTRA COMM+422.PCI Page 1
Card Setup
Card Setup
In all cases J1x is for port 1, J2x - port 2, J3x - port 3 and J4x – port 4.
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 COMM+422.PCI 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 application program. This
ability means that the user can effectively use the ULTRA COMM+422.PCI in
an RS-485 application with existing (i.e. standard RS-232) software drivers.
Headers J1B – J4B are used to control the RS-485 mode functions for the driver
circuit. The selections are ‘RTS’ enable (silk-screen ‘RT’) or ‘Auto’ enable
(silk-screen ‘AT’). 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.
Position 3 (silk-screen ‘NE’) of J1B – J4B is used to control the RS-485
enable/disable functions for the receiver circuit and determine the state of the
RS-422/485 driver. 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’.
For RS-422/530/449 compatibility remove the jumpers at J1B – J4B.
Examples on the following pages describe all of the valid settings for J1B – J4B.
Sealevel Systems ULTRA COMM+422.PCI Page 2
Card Setup
Interface Mode Examples J1B – J4B
ATRTNE
Figure 1- Headers J1B – J4B, RS-422
ATRTNE
Figure 2 - Headers J1B – J4B, RS-485 ‘Auto’ Enabled, with ‘No Echo’
ATRTNE
Figure 3 - Headers J1B – J4B, RS-485 ‘Auto’ Enabled, with ‘Echo’
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Card Setup
Interface Mode Examples J1B –J4B (continued)
ATRTNE
Figure 4 - Headers J1B – J4B, RS-485 ‘RTS’ Enabled, with ‘No Echo’
ATRTNE
Figure 5 - Headers J1B – J4B, RS-485 ‘RTS’ Enabled, with ‘Echo’
Address and IRQ selection
The ULTRA COMM+422.PCI is automatically assigned I/O addresses and
IRQs by your motherboard BIOS. Only the I/O addresses may be modified by
the user. Adding or removing other hardware may change the assignment of I/O
addresses and IRQs.
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Card Setup
Line Termination
Typically, each end of the RS-485 bus must have line terminating resistors
(RS-422 terminates the receive end only). A 120-ohm resistor is across each
RS-530/422/485 input in addition to a 1K ohm pull-up/pull-down combination
that biases the receiver inputs. Headers J1A – J4A allow the user to customize
this interface to their specific requirements. Each jumper position corresponds to
a specific portion of the interface. If multiple ULTRA COMM+422.PCI
adapters are configured in an 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
P Adds or removes the 1K ohm pull-down resistor in the
RS-422/RS-485 receiver circuit (Receive data only).
P Adds or removes the 1K ohm pull-up resistor in the
RS-422/RS-485 receiver circuit (Receive data only).
T Adds or removes the 120 ohm termination.
L Connects the TX+ to RX+ for RS-485 two wire operation.
L Connects the TX- to RX- for RS-485 two wire operation.
P P T L L
Figure 6 - Headers J1A – J4A, Line Termination
Sealevel Systems ULTRA COMM+422.PCI Page 5
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