SeaLevel DIO-104.OPTO User manual

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© Sealevel Systems, Inc. 3720 Manual | SL9019 7/2021
DIO-104.OPTO
User Manual | 3720

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© Sealevel Systems, Inc. 3720 Manual | SL9019 7/2021
Contents
CONTENTS...........................................................................................................................................................2
INTRODUCTION ...................................................................................................................................................3
BEFORE YOU GET STARTED ...............................................................................................................................4
CARD SETUP ........................................................................................................................................................6
SOFTWARE INSTALLATION................................................................................................................................7
PHYSICAL INSTALLATION................................................................................................................................10
PROGRAMMING THE DIO-104.OPTO ...............................................................................................................11
ELECTRICAL CHARACTERISTICS .....................................................................................................................14
SPECIFICATIONS ...............................................................................................................................................15
EXAMPLE CIRCUITS ..........................................................................................................................................16
APPENDIX A –TROUBLESHOOTING................................................................................................................17
APPENDIX B –HOW TO GET ASSISTANCE .....................................................................................................18
APPENDIX C –SILK SCREEN –3720 PCB.......................................................................................................19
APPENDIX D –COMPLIANCE NOTICES ..........................................................................................................20
WARRANTY ........................................................................................................................................................21

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Introduction
The DIO-104.OPTO is a PC/104 form factor adapter that provides 16 optically isolated inputs (rated for 3-
13V) to allow monitoring of off board switch closures, relays or for any other general purpose monitoring
needs.
The DIO-104.OPTO is designed to be used with a variety of Operating Systems including Windows and DOS.
The SeaI/O API (Application Programmer Interface) is available upon request and provides a variety of
useful high-level function calls implemented as a Windows dynamic link library (DLL). In addition to the API,
SeaI/O includes sample code and utilities to simplify software development.
Other Sealevel PC104 Digital I/O Products
Model No.
Parts No.
Description
PIO-48.PC104
(P/N 3701)
- 48 Channel TTL
DIO-104.REL
(P/N 3710)
- 16 Reed Relay Outputs
DIO-32.104
(P/N 3730)
- 16 Optically Isolated Inputs/16 Reed Relays

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Before You Get Started
Wat’s Included
The DIO-104.REL is shipped with the following items. If any of these items are missing or damaged,
please contact Sealevel for replacement.
•DIO-104.OPTO 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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Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing the DIO-104.OPTO to real-world signals. All items can be purchased from our website
(http://www.sealevel.com) or by calling 864-843-4343.
40-Pin IDC to DB-37 Female 8” Ribbon Cable (Part Number CA211)
For compatibility with other Sealevel digital I/O devices, the CA211 connects to the 40-pin
header connector on the DIO-104.OPTO and provides a DB-37 Female connector.
DB-37 Male to DB-37 Female 6’ Cable - (Part Number CA112)
This cable extends the DB-37 connector on the DIO-104.OPTO 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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Card Setup
Address Selection
The DIO-104.OPTO occupies 4 consecutive I/O locations. The DIP-switch (S1) is used to set the base
address for these locations. Be careful when selecting the base address as some selections conflict with
existing PC ports. The following table shows several examples that usually do not cause a conflict. Even
though four I/O addresses are decoded, only the first two are actually used, the other two ports are to
maintain compatibility with existing Sealevel Systems adapters.
Address
Binary
Switch Settings
A9
A8
A7
A6
A5
A4
A3
A2
1
2
3
4
5
6
7
8
100-103
01 0000 00xx
On
Off
On
On
On
On
On
On
104-107
01 0000 01xx
On
Off
On
On
On
On
On
Off
200-203
10 0000 00xx
Off
On
On
On
On
On
On
On
280-283
10 1000 00xx
Off
On
Off
On
On
On
On
On
284-287
10 1000 01xx
Off
On
Off
On
On
On
On
Off
2EC-2EF
10 1110 11xx
Off
On
Off
Off
Off
On
Off
Off
300-303
11 0000 00xx
Off
Off
On
On
On
On
On
On
320-323
11 0010 00xx
Off
Off
On
On
Off
On
On
On
388-38B
11 1000 10xx
Off
Off
Off
On
On
On
Off
On
3A0-3A3
11 1010 00xx
Off
Off
Off
On
Off
On
On
On
3A4-3A7
11 1010 01xx
Off
Off
Off
On
Off
On
On
Off
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 is selected as the base address. Address
300 in binary is XX 11 0000 00XX where X = a non-selectable address bit.
1 2 3 4 5 6 7
ON
OFF
A9 A2
8
Setting the switch ‘On’ or ‘Closed’ corresponds to a ‘0’ in the address, while leaving it ‘Off’ or ‘Open’
corresponds to a ‘1’.

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Software Installation
Windows Installation
Do not install the Adapter in the machine until the software has been fully installed.
Only users running Windows 7 or newer should utilize these instructions for accessing and installing
the appropriate driver via Sealevel’s website. If you are utilizing an operating system prior to
Windows 7, please contact Sealevel by calling 864.843.4343 or emailing suppo[email protected] to
receive access to the legacy driver download and installation instructions.
1. Begin by locating, selecting, and installing the correct software from the Sealevel software driver
database.
2. Select the Part Number (#3720) for your adapter from the listing.
3. Select ‘Download Now’for the SeaIO Classic for Windows. The setup file will automatically detect
the operating environment and install the proper components. Next (depending on your browser)
select the ‘Run this program from its current location’ or ‘Open’ option. Follow the information
presented on the screens that follow. During setup, the user may specify installation directories
and other preferred configurations. This program also adds entries to the system registry that are
necessary for specifying the operating parameters for each driver. An uninstall option is also
available to remove SeaIO files and registry/INI file entries from the system.
4. If installing in NT, skip to step 13. ‘Windows NT Card Installation.’
5. Go to the “Add New Hardware Wizard” in the Control Panel.
6. When the Wizard asks if you want Windows to search for the new hardware, choose “No, I want to
select the hardware from a list.”
7. Scroll through the list of categorized hardware and select ‘SeaIO Devices.’ If this is the first SeaIO
device you may need to select ‘Other Devices’ and ‘Sealevel Systems, Inc.’ instead of ‘SeaIO
Devices.’
8. Click “Next.”
9. Select the card model and press “Next.”
10. The Wizard will guide you through a few more informational prompts; continue to click “Next” until
it is completed.
11. Your card’s resource assignments may be adjusted through the Device Manager (if, for instance,
you need to change the I/O port address Windows assigned when you installed the card).
12. Windows software installation is complete
13. Windows NT Card Installation: After accomplishing steps 1 –6, bring up the Control Panel and
double-click on the SeaIO Devices icon. To install a new card, click “Add Port.” Repeat this
procedure for as many SeaIO cards as you wish to install.

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Linux Installation
You MUST have “root” privileges to install the software and drivers.
The syntax is case sensitive.
Users can obtain a README file included in the SeaIO Linux package which contains important
installation and configuration instructions that makes the Linux installation more user friendly.
1. Begin by locating, selecting, and installing the correct software from the Sealevel software driver
database.
2. Select the Part Number (P/N: 3720) for your adapter from the listing.
3. Select ‘Download Now’ for the version of SeaIO Classic for Linux.
4. Copy seaio.tar.gz to your home directory by typing:
cp seaio.tar.gz ~
5. Change to your home directory by typing:
cd
6. Unzip and Untar the drivers and software by typing:
tar -xvzf seaio.tar.gz
7. Change to the SeaIO directory by typing:
cd seaio
8. User must download and compile a Linux kernel source.
9. Now compile and prepare the drivers for use by typing:
make install
10. Using your favorite text editor, edit the /etc/seaio.conf
11. Within the quote marks, insert
cardtype=0xYourSeaIOcardType io=0xCardBaseAddress

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Linux Installation, Continued
Your SeaIO card Type = Model Number of your SeaIO Card.
CardBaseAddress = What base address you have your SeaIO card addressed at.
12. Save the file and exit your editor.
13. With the system off and unplugged, install your SeaIO PCI card (See Physical Installation).
14. Plug system back in and boot Linux. Login as "root".
15. Load the SeaIO driver by typing:
seaioload
16. The driver has enabled the card and is ready to use.
To set up Linux to automatically load the driver; refer to a Linux manual concerning your specific distribution
for help.
For additional software support, please call Sealevel Systems’ Technical Support, [phone]. Our
technical support is free and available from 8:00 AM - 5:00 PM Eastern Time, Monday through Friday. For
email support contact: supp[email protected].

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Physical Installation
Extreme care should be taken when installing the DIO-104.OPTO to avoid causing damage to the
connectors. After the adapter is installed, connect your I/O cable to P2. Please note these headers are
keyed so that pin 1 of the cable matches pin 1 of the connector. Refer to Card Setup for information on
setting the address before inserting the DIO-104.OPTO onto the stack.
Do not install the Adapter in the machine until the software has been fully installed
1. Turn off power. Disconnect the power cord.
2. Remove the case cover (if applicable).
3. Gently insert the DIO-104.OPTO connector noting proper key orientation of the expansion
connector on a PC/104 compatible card. The DIO-104.OPTO adapter is keyed per the current
PC/104 Specification. This will aid in preventing the adapter from being inserted incorrectly.
4. Mounting hardware (nylon stand-offs and screws) is provided to ensure a good mechanical
connection. Retain any mounting hardware not used to allow for future expansion.
5. The cables provided are keyed and can be installed before or after the adapter is inserted in the
stack.
6. Replace the cover.
7. Connect the power cord and power up the machine.
The DIO-104.OPTO is now ready for use.
3rd Party Software
For the most up to date information on third party software support, please visit:
https://www.sealevel.com/support/3rd-party-software-support/.

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Programming the DIO-104.OPTO
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. Included in the SeaI/O 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-104.OPTO. 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
software once it is downloaded. 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-104.OPTO provides four parallel input/output (I/O) ports. The ports are organized as ports A, B, C,
and D. Ports A and B are input ports interfaced to optically-isolated inputs, while ports C and D decoded but
not used. Assuming an I/O address of 300 Hex the following table shows the Port Addresses.
Base Address
Hex
Decimal
Mode
Port A Address
300
768
Port B Address
301
769
Optically Isolated Input Port
Port C Address
302
770
Port D Address
303
771
Not used

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Input Ports
Ports A and B are 8 bit input ports 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 also isolated with respect to the host PC ground.
This means that signals such as low-level AC 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.
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 signal is high enough to cause the opto-isolator to turn-on, the
output of the opto-isolator goes low (0 volts), and the port bit 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 560 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
220W
1.8V
1.8 –7.0V
8.5V
27mA
560W
2.8V
2.8 –10.6V
12.9V
20mA
1KW
4.1V
4.1 –13.8V
16.9V
15mA
2.2KW
7.7V
7.7 –20.0V
24.5V
10mA
3.3KW
10.0V
10.0 –24.0V
30.0V
9mA
4.7KW
15.2V
15.2 –28.0V
35.0V
7mA
The turn-off voltage for all resistors is less than 1V.

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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.
Input Pin Assignments (P2)
Port A Bit
P2
DB-37
Port B Bit
P2
DB-37
0
36
18
35
37
0
20
29
19
10
1
34
17
33
36
1
18
28
17
9
2
32
16
31
35
2
16
27
15
8
3
30
15
29
34
3
14
26
13
7
4
28
14
27
33
4
12
25
11
6
5
26
13
25
32
5
10
24
9
5
6
24
12
23
31
6
8
23
7
4
7
22
11
21
30
7
6
22
5
3
Ground
4
21
3
2
2
20
+ 12 Volts
1
1
+ 5 Volts
37
19
Reading the Inputs
The inputs are active Low. If no voltage is applied across one of the differential inputs it returns a one on
that bit. If an AC or DC voltage (of sufficient magnitude, covered above) is applied it returns a zero on that
bit.
Function Available
Port
Address Hex
R
A
Base + 0
R
B
Base + 1
R = Read

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Electrical Characteristics
Features
•2 eight bit input ports
•Selectable I/O port addressing from 100H - 3FFH
•Multiple adapters can reside in same computer
•All address, data and control signals are TTL compatible

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Specifications
Input Ports
Turn On Current
3mA
Isolator Diode Drop
1.1 VDC
Resistor Power Max
.25 W
Maximum Input Range
3-13 VDC/VAC
Temperature Range
Operating
0°C –70°C
Storage
-50°C –105°C
Power Consumption
Supply line
+5VDC
+12VDC
Rating
125 mA
(Optional)
Physical Dimensions
PCB Length
3.6” (9.0 cm)
PCB Height
3.8” (9.6 cm)
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.

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Example Circuits
Input Circuit

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© Sealevel Systems, Inc. 3710 Manual | SL9128 7/2021
Appendix A –Troubleshooting
The adapter should provide years of trouble-free service. However, in the event that device appears to not
be functioning incorrectly, the following tips can eliminate most common problems 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. Use Device Manager under Windows to verify proper installation.
4. Use the SeaIO Control Panel applet or the Device Manager’s property page for card identification
and configuration.
5. Always use the Sealevel Systems diagnostic software when troubleshooting a problem. This will
eliminate any software issues from the equation.
6. The following are known I/O conflicts:
•The 278 and 378 settings may conflict with your printer I/O adapter.
•3B0 cannot be used if a Monochrome adapter is installed.
•3F8-3FF is typically reserved for COM1:
•2F8-2FF is typically reserved for COM2:
•3E8-3EF is typically reserved for COM3:
•2E8-2EF is typically reserved for COM4:
If these steps do not solve your problem, please call Sealevel Systems’ Technical Support, [phone].
Our technical support is free and available from 8:00 A.M.to 5:00 P.M. Eastern Time Monday through Friday.
For email support contact sup[email protected].

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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.htm .
4. Sealevel Systems maintains a Home page on the Internet. Our home page address is
https://www.sealevel.com/. The latest software updates, and newest manuals are available via our
FTP site that can be accessed from our home page.
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]. For email support contact supp[email protected].
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.

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Appendix C –Silk Screen –3720 PCB

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Appendix D –Compliance Notices
Federal Communications Commission (FCC) Statement
This equipment has been tested and found to comply with the limits for Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in such case the user will be required to correct
the interference at the user’s expense.
EMC Directive Statement
Products bearing the CE Label fulfill the requirements of the EMC directive (89/336/EEC)
and of the low-voltage directive (73/23/EEC) issued by the European Commission. To
obey these directives, the following European standards must be met:
•EN55022 Class A - “Limits and methods of measurement of radio interference
characteristics of information technology equipment”
•EN55024 –“Information technology equipment Immunity characteristics Limits
and methods of measurement”.
This is a Class A Product. In a domestic environment, this product may cause radio interference in
which case the user may be required to take adequate measures to prevent or correct the
interference.
Always use cabling provided with this product if possible. If no cable is provided or if an alternate
cable is required, use high quality shielded cabling to maintain compliance with FCC/EMC
directives.