SeaLevel PCIO 4035 User manual

PCIO™
USER’S MANUAL
Part Number 4035
Sealevel Systems, Inc Phone: [phone]
155 Technology Place Fax: [phone]
P.O. Box 830 www.sealevel.com
Liberty, SC 29657

Contents
INTRODUCTION ........................................................................ 1
OVERVIEW ...........................................................................................1
WHAT’S INCLUDED .............................................................................1
FACTORY DEFAULT SETTINGS .............................................................1
CARD SETUP............................................................................. 2
SERIAL PORT ADDRESS SELECTION......................................................2
PARALLEL PORT ADDRESS SELECTION.................................................3
PORT ENABLE / DISABLE.....................................................................3
IRQ SELECTION...................................................................................4
INTERRUPT MODES..............................................................................4
HEADERS E1.......................................................................................5
HEADERS E2.......................................................................................5
INSTALLATION.......................................................................... 7
OPERATING SYSTEM INSTALLATION....................................................7
For Windows Users.......................................................................7
Other Operating Systems..............................................................7
TECHNICAL DESCRIPTION ....................................................... 8
FEATURES ...........................................................................................8
LINE TERMINATION.............................................................................8
CONNECTOR PIN ASSIGNMENTS...........................................................9
RS-422...........................................................................................9
RS-232...........................................................................................9
Parallel Port.................................................................................10
SPECIFICATIONS..................................................................... 11
ENVIRONMENTAL SPECIFICATIONS....................................................11
MANUFACTURING.............................................................................11
POWER CONSUMPTION......................................................................11
MEAN TIME BETWEEN FAILURES (MTBF)........................................11
PHYSICAL DIMENSIONS.....................................................................11
APPENDIX A -TROUBLESHOOTING....................................... 12
APPENDIX B -HOW TO GET ASSISTANCE............................. 14
APPENDIX C -ELECTRICAL INTERFACE................................ 15
RS-232............................................................................................15
RS-422............................................................................................15
RS-485............................................................................................16

CENTRONICS AND BI-DIRECTIONAL PARALLEL PORTS......................16
APPENDIX D -ASYNCHRONOUS COMMUNICATIONS.............18
APPENDIX E -COMPLIANCE NOTICES....................................19
FEDERAL COMMUNICATIONS COMMISSION STATEMENT ..................19
EMC DIRECTIVE STATEMENT...........................................................19
WARRANTY.............................................................................20
Trademarks...................................................................................20
Figures
Figure 1 -Address Selection Table..................................................................2
Figure 2 -DIP-Switch SW2 Illustration............................................................2
Figure 3 -Address Selection Table..................................................................3
Figure 4 -DIP-Switch SW1 Illustration............................................................3
Figure 5 -Header E1 and E3, Interface Selection Options.............................5
Figure 6 -Interface Option Examples..............................................................6
Figure 7 -Asynchronous Communications Bit Diagram...............................18
© 1998a Sealevel Systems, Incorporated. All rights reserved.

Introduction
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Introduction
Overview
The PCIO provides the PC with one async serial port which can interface
to RS-232, RS-422, or RS-485 and one Centronics parallel port for
printers with bi-directional capability for general purpose parallel I/O.
What’s Included
The PCIO is shipped with the following items. If any of these items are
missing or damaged, contact the supplier.
•PCIO Serial I/O Adapter
•Serial Utility Software
•User Manual
Factory Default Settings
The PCIO factory default settings are as follows:
Port Base Address IRQ Electrical Specification
Serial Port 3F8 4RS-232
Parallel Port 378 7Bi-directional
To install the PCIO using factory default settings, refer to Installation on
page 7.
For your reference, record installed PCIOsettings below:
Port Base Address IRQ Electrical Specification
Serial Port
Parallel Port

Card Setup
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Card Setup
The PCIO contains several jumper straps which must be set for proper
operation.
Serial Port Address Selection
The serial port on the PCIO 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. SW2 sets the I/O address for the serial port.
Address Binary Switch Position Setting
Hex A9 A0 1234567
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 Hex is selected as a base. Address 300 in
binary is XX11 0000 0XXX where X = a non-selectable address bit.
ON
1 2 3 4 5 6 7 8
ENA3A9
Figure 2-DIP-Switch SW2 Illustration
Note: 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.

Card Setup
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Parallel Port Address Selection
The parallel port on the PCIO occupies 4 consecutive I/O locations
DIP-switch (SW1) is used to set the base address for these locations.
Address Binary SW2 Switch Position Setting
Hex (A9)A8 A2 1234567
3BC-3BF (1) 1101111XX Off Off On Off Off Off Off
378-37B (1) 1011110XX Off On Off Off Off Off On
278-27B (1) 0011110XX On On Off Off Off Off On
300-303 (1) 1000000XX Off On On On On On On
2B0-2B3 (1) 0101100XX On Off On Off Off On On
270-273 (1) 0011100XX On On Off Off Off On On
Figure 3-Address Selection Table
Note:Address line A9 is always a ‘1’ .
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, the address 378 Hex through 37B Hex is selected.
378 Hex =11 0111 0XXX in binary representation.
ON
`
A8
1 2 3 4 5 6 7 8
A2
EN
Figure 4-DIP-Switch SW1 Illustration
Note: Setting the switch ‘On’ or ‘Closed’ corresponds to a ‘0’ in the
address, while leaving it ‘Off’ or ‘Open’ corresponds to a ‘1’.
Port Enable / Disable
Each port on the PCIO 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.

Card Setup
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IRQ Selection
Headers E4 and E5 select the interrupt request for each 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. If LPT1:
is selected IRQ7 should be used if LPT2: is selected IRQ5 should be
used.
Note: 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.
Note: The actual Silk-Screen for the PCIO may have a ‘2’ in place of the
IRQ ‘2/9’ selection.
Any two or more ports can share a common IRQ by placing the jumpers
on the same IRQ setting at header E6, and setting the appropriate
selections at E3. Consult your particular software for IRQ selection. If no
interrupt is desired, remove the jumper.
Interrupt Modes
Jumper block E5 allows you to select a single interrupt per port mode or a
shared interrupt mode. The single interrupt per port mode is the typical
DOS, O/S 2 and Windows mode of operation.
The shared interrupt mode, which allows more than one port to access a
single IRQ, indicates the inclusion of a 1K ohm pull-down resistor
required on one port when sharing interrupts. This mode is used by
software that requires COM3: and COM4: to share interrupts with COM1:
and COM2: or in an OEM configuration to support a specific software
application.
Placing the jumper on ‘N’ selects the normal single interrupt per board
mode. Placing the jumper on the ‘M’ position selects the multi interrupt
mode. The multi interrupt mode allows you to share the IRQ signal(s) with
other cards that support multiple interrupts. The ‘M’ and ‘N’ selections
for the serial port are under ‘SP’ and labeled ‘PP’ for the parallel Port.

Card Setup
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Headers E1
These jumper blocks make the connection between the UART pins and the
actual driver/receiver pair that are used. If you are using the RS-232
driver/receiver pair, all eight of these jumpers will be in the ‘A’ position.
If you are using the RS-422 driver/receiver pair all eight of these jumpers
will be in the ‘B’ position.
Headers E2
These jumper blocks allow you to customize your interface in the
following ways:
•Select if Modem control signals are used or tied ‘True’.
•Select the RS-485 enable options.
•Select whether the Ground connection is a Direct Ground or a High
Impedance Ground through a 100 ohm resistor.
1
2
3
4
5
6
7
8
A | B
E2
"A" Selects RS-232 Receive Data; "B" Selects RS-422 Receive Data
"A" Enables CTS; Remove to set Active
"A" Enables DSR; "B" sets DSR Active
"A" Enables DCD; "B" sets DCD Active
"A" Enables RI; "B" Sets RI Active
"A" Also required to Enable CTS; "B" Sets CTS Active
"B" Selects Direct Ground; "A" Selects 100 ohm High Impedence Ground
"B" sets RS-485 Driver Enabled by RTS; "A" RS-485 Driver always Enabled
Figure 5-Header E1 and E3, Interface Selection Options

Card Setup
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A|B
A|B
A|B
A|B
A|B
A|B
E2
E2
E2
E1
E1
E1
RS-232
RS-422
RS-485
Figure 6-Interface Option Examples