SeaLevel DIO-16.PCI User manual

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
DIO-16.PCI
User Manual | 8002H

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
Contents
CONTENTS............................................................................................................................................................................................................................2
INTRODUCTION...................................................................................................................................................................................................................3
BEFORE YOU GET STARTED..............................................................................................................................................................................................4
SOFTWARE INSTALLATION ...............................................................................................................................................................................................6
HARDWARE INSTALLATION...............................................................................................................................................................................................7
PROGRAMMING THE DIO-16.PCI....................................................................................................................................................................................8
ELECTRICAL CHARACTERISTICS...................................................................................................................................................................................14
SPECIFICATIONS...............................................................................................................................................................................................................15
EXAMPLE CIRCUITS ..........................................................................................................................................................................................................17
APPENDIX A –TROUBLESHOOTING.............................................................................................................................................................................18
APPENDIX B –HOW TO GET ASSISTANCE..................................................................................................................................................................19
APPENDIX –SILK SCREEN –8002H PCB..................................................................................................................................................................20
APPENDIX D–COMPLIANCE NOTICES......................................................................................................................................................................... 21
WARRANTY ........................................................................................................................................................................................................................22

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
Introduction
Overview
The DIO-16.PCI provides 8 optically isolated inputs and 8 reed relay outputs. The inputs (rated for 10-30V)
protect the PC and other sensitive equipment from spikes and ground loop current that can be generated
in industrial environments, while the outputs provide high quality, long life, low current (10 Watt maximum),
dry contact switch closures. Reed relays are well suited for low current applications. The relays are normally
open and will close when energized. The board is PCI bus specification 2.1 compliant.
The DIO-16.PCI is designed to be used with a variety of Operating Systems including Windows
98/NT/ME/2000/XP, Linux, and DOS. The SeaI/O API (Application Programmer Interface) included in
Sealevel’s 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.
Other Sealevel PCI Digital I/O Products
PIO-24.PCI
(P/N 8008)
- 24 TTL Inputs/Outputs
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
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

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
Before You Get Started
What’s Included
The DIO-16.PCI is shipped with the following items. If any of these items is missing or damaged, please
contact Sealevel for replacement.
•DIO-16.PCI Adapter
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.

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing the DIO-16.PCI to real-world signals. All items can be purchased from our website
(http://www.sealevel.com) or by calling [phone].
•DB-37 Male to DB-37 Female 6’ Cable - (Part Number CA112)
−This cable extends the DB-37 connector on the REL-16.PCI to six
feet and is pinned one-to-one.
•DB-37 Male/Female Terminal Block (Part Number TB02-KT)
−Break out serial and digital connectors to 37 screw terminals for
easy field connection. The TB02 terminal block is designed with
both DB-37 male and female connectors, therefore; it can be
used with any DB-37 board regardless of the board's port
gender.
•Cable and Terminal Block Kit (Part Number KT101)
−For convenient and easier ordering, the KT101 includes the
TB02-KT terminal block and CA112 cable in a single kit.

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
Software Installation
For Windows 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.
Other Operating Systems
Refer to the appropriate section of the Serial Utilities Software.
LINUX INSTALLATION
Refer to Linux Archives - Sealevel or download the SeaIO Software for Linux. This link contains valuable
information on installing your serial adapter in the various Linux releases. Also included is a series of files
explaining proper Linux syntax and typical Linux serial implementations.
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 [e-mail].

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
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
The DIO-16.PCI is now ready for use.

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
Programming the DIO-16.PCI
Sealevel’s SeaI/O software is provided to assist in the development of reliable applications for the Sealevel
Systems family of digital I/O adapters. Also included in Sealevel’s software are driver functions for use in
accessing the I/O as well as helpful samples and utilities.
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 DIO-16.PCI. 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.
Digital I/O Interface
The DIO-16.PCI provides two parallel input/output (I/O) ports. The ports are organized as ports A, B, C, and
D. Port A is an input port interfaced to optically isolated inputs, while port C is the reed relay output port.
Input Port
Port A is an eight-bit input port connected to optically isolated input sensors. Each sensor can be used to
interface a voltage input and then sense whether the voltage is on or off. Each sensor is isolated (with
respect to a common ground) from every other sensor, and isolated with respect to the host PC ground.
This means that signals such as low-level AC line voltage, motor servo voltage, and control relay signals
can be ‘sensed’, or read by the PC, without the risk of damage due to ground loops or ground faults.

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
Programming the DIO-16.PCI, Continued
Each sensor input pair has a current limiting resistor that is used to limit the input current to the opto-
isolator. The opto-isolator has two ‘back-to-back’ diodes internally. This allows AC or DC signals to be
sensed, regardless of polarity. When the applied voltage is high enough to cause the led in the opto-isolator
to turn-on, the output of the opto-isolator goes low (0 volts), and the signal is read as a low logic level (binary
0) by the PC. When the input signal is too low to turn on the opto-isolator, the output goes high, and the port
bit is read by the PC as a high logic level (binary 1).
The input impedance of each isolated input is approximately 3.3K ohms (factory default). The opto-isolator
requires approximately 3mA to turn on. The maximum input current is 50mA. There are two things to
consider when selecting the input resistor. The first is turn on voltage for the circuit to sense, and second
is the maximum input voltage. Maximum input voltage must not provide too much power to the input
resistor and must also not overdrive the opto-isolator input current specification. The following formulas
apply:
Turn on Voltage = diode drop + (turn on current) x (resistance) [Ex: 1.1 + (.003) x R]
Input Current = ((input voltage)-1.1V) / (resistor value)
Maximum voltage = 1.1 + square root of (.25(resistor value))
The following table shows common input resistors and the ranges associated with each.
Input Resistor
Turn-On
Input Range
Max Input
Max Current
220 
1.8V
1.8 –7.0V
8.5V
27mA
560 
2.8V
2.8 –10.6V
12.9V
20mA
1K 
4.1V
4.1 –13.8V
16.9V
15mA
2.2K 
7.7V
7.7 –20.0V
24.5V
10mA
3.3K 
10.0V
10.0 –24.0V
30.0V
9mA
4.7K 
15.2V
15.2 –28.0V
35.0V
7mA
The turn-off voltage for all resistors is less than 1V.
Increasing the input resistor accordingly can increase the maximum input voltage. Because socketed DIP
resistors are utilized, they can easily be replaced with a different value. Sealevel, if necessary, can do this.
The input circuits are not intended for monitoring 120-volt AC circuits. In addition to being too
high a voltage for the circuits, it is dangerous to have that high a voltage on the card.

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© Sealevel Systems, Inc. 8002H Manual | SL9021 9/2021
Programming the DIO-16.PCI, Continued
Input Port Pin Assignments (DB-37 Male)
Port A Bit
P1
0
2,20
1
3,21
2
4,22
3
5,23
4
6,24
5
7,25
6
8,26
7
9,27
Output Ports (Reed Relays)
Reed relays provide very high quality, long life, low current (10 Watt maximum), dry contact
switch closures. Reed relays are not suited for high current applications, and can be destroyed by
inductive load switching, where a spark occurs across the contacts internally. The relays are
normally open, and close when energized.
Output Port Pin Assignments
Port C Bit
Relay
P2 Pin
0
K1
10,28
1
K2
11,29
2
K3
12,30
3
K4
13,31
4
K5
14,32
5
K6
15,33
6
K7
16,34
7
K8
17,35
Power and Ground Pin Assignments
Ground
18,36,37
+ 5 Volts
19
+ 12 Volts
1