SeaLevel PIO-24.LPCI User manual

1
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
PIO-24.LPCI
User Manual | 8018

2
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Contents
CONTENTS...........................................................................................................................................................2
INTRODUCTION ...................................................................................................................................................3
BEFORE YOU GET STARTED ...............................................................................................................................4
SOFTWARE INSTALLATION ................................................................................................................................7
HARDWARE INSTALLATION ............................................................................................................................... 8
DIGITAL I/O INTERFACE...................................................................................................................................... 9
PROGRAMMING THE PIO-24.LPCI ...................................................................................................................11
ELECTRICAL CHARACTERISTICS .....................................................................................................................15
SPECIFICATIONS ...............................................................................................................................................16
EXAMPLE OF CIRCUITS.....................................................................................................................................17
APPENDIX A –TROUBLESHOOTING................................................................................................................18
APPENDIX B –HOW TO GET ASSISTANCE .....................................................................................................19
APPENDIX C –SILK SCREEN –8018 PCB.......................................................................................................20
APPENDIX D - COMPLIANCE NOTICES ............................................................................................................21
WARRANTY ........................................................................................................................................................22

3
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Introduction
The PIO-24.LPCI, part number 8018, digital I/O interface provides 24 channels of buffered drive digital I/O
emulating 8255 mode zero. The PIO-24.LPCI can be utilized for a variety of control and automation
applications including control and monitoring of TTL devices (e.g., sensors, switches, security control
systems, industrial automations systems, LEDs, small solenoids, and small relays) and interfacing to solid-
state relay racks (SSRs) for high-power AC or DC loads.
The PIO-24.LPCI’s 24 digital I/O channels are accessed via two 26-pin header connectors that are brought
out to a single 50-pin IDC connector with the included CA315 ribbon cable. The headers provide 24 bits of
digital I/O divided into three eight-bit groups. Each eight-bit group may be individually configured via
software command as input or output to best match your particular application requirements.
The PIO-24.LPCI is designed to be used with a variety of Operating Systems including Windows
98/NT/ME/2000/XP, Vista, 7,Linux and DOS. The SeaI/O API (Application Programmer Interface) software
provides a variety of useful high-level function calls implemented as a Windows dynamic link library (DLL)
and as a Linux kernel module and library. In addition to the API, SeaI/O includes sample code and utilities
to simplify software development.
The RoHS compliant version of the PIO-24.LPCI, part number 8018-RoHS, meets the RoHS (2002/95/EC)
and WEEE (2002/96/EC) directives.
Other Sealevel PCI Digital I/O Products
Model No.
Part No.
Description
PIO-32.PCI
(P/N 8010)
- 32 TTL Inputs/Outputs
PIO-48.PCI
(P/N 8005)
-48 TTL Inputs/Outputs
PIO-96.PCI
(P/N 8009)
- 96 TTL Inputs/Outputs
DIO-16.PCI
(P/N 8002)
- 8 Reed Relay Outputs/8 Opto-isolated Inputs
REL-16.PCI
(P/N 8003)
- 16 Reed Relay Outputs
DIO-32.PCI
(P/N 8004)
-16 Reed Relay Outputs/16 Opto-isolated Inputs
ISO-16.PCI
(P/N 8006)
- 16 Opto-isolated Inputs
REL-32.PCI
(P/N 8007)
- 32 Reed Relay Outputs
PLC-16.PCI
(P/N 8011)
- 8 Form C Relay Outputs/8 Opto-isolated Inputs
DIO-16.LPCI
(P/N 8012)
-8 Reed Relay Output/8 Opto-isolated Inputs

4
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Before You Get Started
What’s Included
The PIO-24.LPCI is shipped with the following items. If any of these items are missing or damaged,
please contact Sealevel for replacement.
PIO-24.LPCI Adapter
IDC 50 to (2) IDC 26 Pin 40" Ribbon Cable (Part Number CA315)
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.

5
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing the PIO-24.LPCI to real-world signals. All items can be purchased from our website
(http://www.sealevel.com) or by calling [phone].
***CA315 Included****
For TTL applications:
•IDC 50 to (2) IDC 26 Pin 40” Ribbon Cable (Part Number CA315)
Connects to the two 26-pin header connectors on the 8018 and brings them out to
a single 50-pin IDC connector, which is compatible with industry-standard relay
racks.
•Terminal Block –(Part Number TB07) TB07-KT
The TB07 allows you to break out 24 digital signals, +5 volts, and ground to screw
terminals for easy field connection of switches, discrete solid-state relays, sensors,
etc.
•Simulation/debug module (Part Number TA01)
Module allows monitoring status of output pins and controlling state of input pins.
An LED corresponding to each port bit illuminates to indicate state. Eight position
DIP-switches are used to generate input status changes.

6
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
OPTIONAL ITEMS, CONTINUED
For high-current, high-voltage applications: See attached .doc for inclusions
•IDC 50 to IDC 26 Pin Ribbon Cable (Part Number CA315)
Connects to the two 26-pin header connectors on the 8018 and brings them out to
a single 50-pin IDC connector, which is compatible with industry-standard relay
racks.
•Solid-State Relay Racks:
oQuad six position relay rack (Part Number PB24HQ)
Relay rack can accept up to six QSSRs for a total of 24 channels. Features
a 50-pin header connector for easy interface via 50-conductor ribbon
cables.
oQuad four position relay rack (Part Number PB16HQ)
Relay rack can accept up to four QSSRs for a total of 16 channels. Features
a 50-pin header connector for easy interface via 50-conductor ribbon
cables.
•Quad Solid-State Relay Modules:
oAC Input (Part Number IA5Q) - Provides 4 channels of discrete I/O interface to
monitor AC inputs up to 140V @ 10mA.
oDC Input (Part Number IB5Q) - Provides 4 channels of discrete I/O interface to
monitor DC inputs from 3.3V to 32V.
oAC Output (Part Number OA5Q) - Provides 4 channels of discrete I/O interface
to control AC outputs up to 140V @ 3A.
oDC Output (Part Number OB5Q) - Provides 4 channels of discrete I/O interface
to control DC outputs up to 60V @ 3A.
•Simulation/debug module (Part Number TA01)
Module simulates the operation and load characteristics of a standard 24-channel
relay rack. An LED corresponding to each port bit illuminates to indicate state. Eight
position DIP-switches are used to generate input status changes.

7
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Software Installation
Operating System Installation
For Windows and Linux Users
Begin by locating, selecting, and installing the SeaIO software from the Sealevel website. The SeaIO
Software Overview page provides information that will allow you to easily download the SeaIO Software for
Windows or the SeaIO Software for Linux.
SeaI/O software can also be downloaded from the 8018-product webpage: PIO-24-LPCI Product
Other Operating Systems
Refer to the appropriate section of the Serial Utilities Software.
For additional software support, please call Sealevel Systems’ Technical Support, [phone]. Our
technical support is free and available from 8:00AM-5PM Eastern Time, Monday through Friday. For email
support contact: mailto:[e-mail].

8
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Hardware Installation
The adapter can be installed in any 5V PCI expansion slot.
Do not install the Adapter in the machine until the software has been fully installed.
1. Turn off PC power. Disconnect the power cord.
2. Remove the PC case cover.
3. Locate an available 5V PCI slot and remove the blank metal slot cover.
4. Gently insert the PCI adapter into the slot. Make sure that the adapter is seated
properly.
5. After the adapter has been installed, the cables should be routed thru the opening in
the bracket. This bracket also features a strain relief function that should be used to
prevent un-expected cable removal.
6. Replace the screw you removed for the blank and use it to secure the adapter into the
slot. (This is required to ensure FCC Part 15 compliance.)
7. Replace the cover.
8. Connect the power cord
Installation is finished.

9
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Digital I/O Interface
The PIO-24.LPCI’s 24 digital I/O channels are accessed via two (2) 26-pin header connectors. The included
CA315 connects to the two 26-pin header connectors on the PIO-24.LPCI and brings them out to a single
50-pin IDC connector, which is compatible with industry-standard relay racks. The headers provide 24 bits
of digital I/O divided into three eight-bit ports. Each port may be individually configured via software
command as input or output.
26-pin Header Connectors
You will need to install the bracket assembly and cable to the PIO-24.LPCI prior to installing it in
the PC. The PIO-24.LPCI’s bracket features a unique cable clamp that provides a solid strain relief
to prevent inadvertent cable removal.
Refer to page 12 for the 26-pin connectors pin out.
Sealevel’s SeaI/O software is provided on Sealevel’s website in order to assist in the development
of reliable applications for the Sealevel Systems family of digital I/O adapters.
Programming for Windows
The SeaI/O API (Application Programmer Interface) provides a variety of useful high-level function
calls implemented in a Windows dynamic link library (DLL). The API is defined in the help file
(Start/Programs/SeaIO/SeaIO Help) under “Application Programmers Interface”. This help file
also includes detailed information dealing with installation / removal of the software and
information about latency, logic states, and device configuration.
For C language programmers we recommend using the API to access the PIO-24.LPCI. If you are
programming in Visual Basic, using the ActiveX control included with SeaI/O is advised.
Samples and Utilities
A variety of sample programs and utilities (both executable and source code) are included with
SeaI/O. Further documentation on these samples can be found by selecting
“Start/Programs/SeaIO/Sample Application Description”. Information about where the files are
physically stored on your disk is also included in this same file.
Programming for Linux
SeaI/O for Linux consists of two major parts: a kernel module and a library. The kernel module is a
simple IO pass-through device, allowing the library to handle the more sophisticated functions
provided to SeaI/O users. It is provided in a ‘tarball’ format and can easily be compiled and included
in the kernel build.

10
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
DIGITAL I/O INTERFACE, CONTINUED
Direct Hardware Control
In systems where the user’s program has direct access to the hardware (DOS) the tables that follow
give the mapping and functions that the PIO-24.LPCI provides.
Register Description
Address
Mode
D7
D6
D5
D4
D3
D2
D1
D0
Base+0
RD/WR
PA1D7
PA1D6
PA1D5
PA1D4
PA1D3
PA1D2
PA1D1
PA1D0
Base+1
RD/WR
PB1D7
PB1D6
PB1D5
PB1D4
PB1D3
PB1D2
PB1D1
PB1D0
Base+2
RD/WR
PC1D7
PC1D6
PC1D5
PC1D4
PC1D3
PC1D2
PC1D1
PC1D0
Base+3
WR
CW1D7
0
0
CW1D4
CW1D3
CW1D2
CW1D1
CW1D0
Base+4
RD/WR
0
0
0
0
0
IRQEN1
IRQC11
IRQC10
Base+5
RD
0
0
0
0
0
0
0
IRQST1
0 = Not Used

11
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Programming The PIO-24.LPCI
Presetting an Output Port
Each port has an output register associated with it. This register may be written and retains its value
whether the port is configured as an input or an output. To preset the value of an output port the program
should write to the port when it is configured as an input then configure it as an output.
Writing the Outputs
The outputs are active true. Writing a one (1) corresponds to 5V while writing a zero (0) corresponds to
0V, at the output.
I/O Control Word
Each port may be configured as either Input or Output. This is accomplished by writing
the correct Control Word (CW) to the proper register.
Control Word (X = 0)
Hex Value
Port Setup
7
6
5
4
3
2
1
0
A
B
C Upper
C Lower
1
X
X
0
0
X
0
0
80
Out
Out
Out
Out
1
X
X
0
0
X
0
1
81
Out
Out
Out
In
1
X
X
0
0
X
1
0
82
Out
In
Out
Out
1
X
X
0
0
X
1
1
83
Out
In
Out
In
1
X
X
0
1
X
0
0
88
Out
Out
In
Out
1
X
X
0
1
X
0
1
89
Out
Out
In
In
1
X
X
0
1
X
1
0
8A
Out
In
In
Out
1
X
X
0
1
X
1
1
8B
Out
In
In
In
1
X
X
1
0
X
0
0
90
In
Out
Out
Out
1
X
X
1
0
X
0
1
91
In
Out
Out
In
1
X
X
1
0
X
1
0
92
In
In
Out
Out
1
X
X
1
0
X
1
1
93
In
In
Out
In
1
X
X
1
1
X
0
0
98
In
Out
In
Out
1
X
X
1
1
X
0
1
99
In
Out
In
In
1
X
X
1
1
X
1
0
9A
In
In
In
Out
1
X
X
1
1
X
1
1
9B
In
In
In
In

12
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
PROGRAMMING THE PIO 24.LPCI, CONTINUED
Interrupt Control
When enabled interrupts are generated on port bit D0 of each A port.
n = port number
Interrupt mode select table
IRQCn1
IRQCn0
INT Type
0
0
Low level
0
1
High level
1
0
Falling edge
1
1
Rising edge
Interrupt Read
Reading the INTSTAT port (Base+5) clears any interrupt pending.
IRQST1
(D0) Interrupt status
1 = interrupt pending, 0 = none
Reading the Inputs
The inputs are active true. If an input is driven high (2V to 5.25 V) it will read as a logical one, if driven low
(0V to 0.8V) it will read as a logical zero. If an input is not driven it will read as a one due to the 10K ohm
pull up resistors on each port.
IRQENn
interrupt enable
1 = enabled
0 = disabled ( 0 on power up )
IRQCn0
IRQCn1
Interrupt mode select, see table below
Interrupt mode select, see table below

13
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
PROGRAMMING THE PIO 24.LPCI, CONTINUED
Reading the Outputs
The value that is currently being used to drive the outputs will be returned.
Figure 1- 8018 board level 26 pin box header connector pin out

14
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
PROGRAMMING THE PIO 24.LPCI, CONTINUED
Figure 2 - CA315 50-Pin IDC Connector - Pin Out

15
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Electrical Characteristics
The PIO-24.LPCI uses 74LS245 octal bi-directional transceivers to provide TTL input/output capabilities.
Each bit is pulled to +5V through a 10K ohm pull-up resistor to ensure each bit is at a known state when
not driven.

16
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Specifications
Inputs
Logic High
Min 2VDC
Logic Low
Max 0.8VDC
Outputs
Logic High
Min 2VDC @15 mA
Logic Low
Max 0.5VDC @24 mA
Temperature Range
Specification
Operating
Storage
Operating
0º to 70º C
-50º to 105º C
Manufacturing
All Sealevel Systems Printed Circuit boards are built to UL 94V0 rating and are 100% electrically tested.
These printed circuit boards are solder mask over bare copper or solder mask over tin nickel.
Power Requirements
Supply Line
+5 VDC
Rating
1A

17
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Example of Circuits

18
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Appendix A –Troubleshooting
Sealevel Software is supplied with the Sealevel Systems adapter and will be used in the troubleshooting
procedures. By using this software and following these simple steps, most common problems can be
eliminated without the need to call Technical Support.
1. Install software first. After installing the software then proceed to adding the hardware. This
places the required installation files in the correct locations.
2. Read this manual thoroughly before attempting to install the adapter in your system.
3. Locate your SeaIO adapter in the Device Manager (under Windows) to identify and verify proper
installation.
4. Use the SeaIO in the Device Manager for card configuration.
5. Always use the Sealevel Systems diagnostic software when troubleshooting a problem. This
will eliminate any software issues from the equation.
If these steps do not solve your problem, please call Sealevel Systems’ Technical Support, (864) 843-
4343. Our technical support is free and available from 8:00AM-5PM Eastern Time Monday through
Friday. For email support contact [e-mail].

19
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Appendix B –How To Get Assistance
Please refer to Troubleshooting Guide prior to calling Technical Support.
1. Begin by reading through the Trouble Shooting Guide in Appendix A. If assistance is still needed,
please see below.
2. When calling for technical assistance, please have your user manual and current adapter
settings. If possible, please have the adapter installed in a computer ready to run diagnostics.
3. Sealevel Systems provides an FAQ section on its web site. Please refer to this to answer many
common questions. This section can be found at http://www.sealevel.com/faq.asp.
4. Sealevel Systems maintains a web page on the Internet. Our home page address is
www.sealevel.com. The latest software updates, and newest manuals are available via our web
site.
5. Technical support is available Monday to Friday from 8:00 a.m. to 5:00 p.m. eastern time.
Technical support can be reached at [phone].
RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL SYSTEMS BEFORE RETURNED
MERCHANDISE WILL BE ACCEPTED. AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL
SYSTEMS AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION (RMA) NUMBER.

20
© Sealevel Systems, Inc. 8018 Manual | SL90319/2021
Appendix C –Silk Screen –8018 PCB