SeaLevel SeaPORT DIO-16 User manual

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
DIO-16
User Manual | 3096H

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Contents
CONTENTS...........................................................................................................................................................2
INTRODUCTION ...................................................................................................................................................3
BEFORE YOU GET STARTED ...............................................................................................................................4
CARD SETUP ........................................................................................................................................................6
SOFTWARE INSTALLATION................................................................................................................................8
PHYSICAL INSTALLATION................................................................................................................................10
PROGRAMMING THE DIO-16 ............................................................................................................................11
ELECTRICAL CHARACTERISTICS .....................................................................................................................17
SPECIFICATIONS ...............................................................................................................................................18
EXAMPLE CIRCUITS ..........................................................................................................................................19
APPENDIX A –TROUBLESHOOTING................................................................................................................20
APPENDIX B –HOW TO GET ASSISTANCE .....................................................................................................21
APPENDIX C –SILK SCREEN - 3096H PCB......................................................................................................22
APPENDIX D –COMPLIANCE NOTICES ..........................................................................................................23
WARRANTY ........................................................................................................................................................24

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Introduction
The DIO-16 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 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 the
software available for the DIO-16 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 ISA Digital I/O Products
Model No.
Part No.
Description
ISO-16
(P/N 3094)
- 16 Optically Isolated Inputs
REL-16
(P/N 3095)
- 16 Reed Relay Outputs
DIO-32B
(P/N 3093)
- 16 Reed Relay Outputs / 16 Opto-Isolated
Inputs
REL-32
(P/N 3098)
- 32 Switched Relay Outputs
PIO-48
(P/N 4030)
- 48 TTL Inputs/Outputs

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Before You Get Started
What’s Included
The DIO-16 is shipped with the following items. If any of these items are missing or damaged, please
contact Sealevel for replacement.
•DIO-16 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-16 to real-world signals. All items can be purchased from our website
(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. 3096H Manual | SL9026H 7/2021
Card Setup
The DIO-16 contains several jumper straps for each port that must be set for proper operation.
Address Selection
The DIO-16 occupies 4 consecutive I/O locations. The DIP-switch (SW1) 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.
Address
Binary
Switch Settings
1
2
3
4
5
6
7
8
100-104
01 0000 00xx
Off
On
On
On
On
On
On
On
104-108
01 0000 01xx
Off
On
On
On
On
On
On
Off
200-204
10 0000 00xx
On
Off
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
Off
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
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 is selected as the base address. Address
300 in binary is XX 11 0000 00XX where X = a non-selectable address bit and address bit A9 is always a 1.
1 2 3 4 5 6 7
ON
OFF
A9 A2
8
DIP-Switch Illustration
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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Card Setup, Continued
IRQ Header E2
Interrupts can be generated by Port A, bit 0 going low if enabled at jumper location (E2). Interrupt request
signals 2/9 through 7 (IRQ 2/9 - 7) can be selected by placing the jumper in the appropriate position. Other
inputs can be ‘wire OR ed.’ to also generate interrupts if desired. Please consult the factory for more
information.
IRQ Header E2

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Software Installation
Windows 98/ME/NT/2000/XP Installation
Do not install the adapter in the machine until the software has been fully installed.
1. Begin by locating, selecting, and installing the correct software (SeaIO Classic for Windows) from
the Sealevel software driver database.
2. Select the Part Number (3096H) 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.
4. A screen may appear with the declaration: “The publisher cannot be determined due to the
problems below: Authenticode signature not found.” Please select the ‘Yes’ button and proceed
with the installation. This declaration simply means that the Operating System is not aware of the
driver being loaded. It will not cause any harm to your system.
5. 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 included to remove all registry/INI file entries
from the system.
Windows NT Card Installation:
After accomplishing the above steps, 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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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Linux Installation
You MUST have “root” privileges to install the software and drivers.
1. Begin by locating, selecting, and installing the correct software (SeaIO Classic for Linux) from the
Sealevel software driver database.
2. Select the Part Number (3096H) for your adapter from the listing.
3. Select “Download Now” for the SeaIO Classic for Linux.’ 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.
4. Now compile and prepare the drivers for use: make install
5. With the system off and unplugged, install your SeaIO PCI card.
6. Plug system back in and boot Linux. Login as "root".
7. Load the driver by typing: SeaIO -load
8. 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.

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Physical 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 is now ready for use.

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Programming the DIO-16
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 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. 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.
Application Programmers Interface (API)
Most modern operating systems do not allow direct hardware access. The SeaIO driver and API have been
included to provide control over the hardware in Windows and Linux environments. The purpose of this
section of the manual is to help the customer with the mapping of the API to the actual inputs and relays
for the 3093 specifically. Complete documentation of the API can be found in its accompanying help file.

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Programming the DIO-16, Continued
Digital I/O Interface
The DIO-16 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. Ports
B and C are unused.
Base Address
Hex
Decimal
Mode
Port A Address
300
768
Optically Isolated Input Port
Port B Address
301
769
Unused
Port C Address
302
770
Reed Relay Output Port
Port D Address
303
771
Unused
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 also 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.
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))

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Programming the DIO-16, Continued
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.
Sensor Input Port Assignments (P1)
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.

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Programming the DIO-16, Continued
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
Relative Addressing vs. Absolute Addressing
The SeaIO API makes a distinction between “absolute” and “relative” addressing modes. In absolute
addressing mode, the Port argument to the API function acts as a simple byte offset from the base I/O
address of the device. For instance, Port #0 refers to the I/O address base + 0; Port #1 refers to the I/O
address base + 1.
Relative addressing mode, on the other hand, refers to input and output ports in a logical fashion. With a
Port argument of 0 and an API function meant to output data, the first (0th) output port on the device will
be utilized. Likewise, with a Port argument of 0 and an API function designed to input data, the first (0th)
input port of the device will be utilized.
In all addressing modes, port numbers are zero-indexed; that is, the first port is port #0, the second port is
#1, the third #2, and so on.

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Programming the DIO-16, Continued
Direct Hardware Control
In systems where the user’s program has direct access to the hardware (i.e., DOS) the table below gives
the mapping and functions that the DIO-16 provides.
R = Read
R/W = Read or Write
Function Available
Port
Address Hex
Port Type
RD
A
Base+0
Input Port (Opto Input)
B
Base+1
Not Assigned
R/W
C
Base+2
Output Port (Reed Relays)
D
Base+3
Not Assigned
RD = Read, RD/WR = Read or Write
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 is applied it returns a zero on that bit.
Reading the Outputs
The relay ports return the ones complement of the value that is currently being used to drive the relays.
Writing the Outputs
The output ports are the only ports that can be written. The relays on a standard DIO-16 are normally open.
To close a relay a one must be written to the appropriate bit.
Register Description
All ports are set to input after reset or power up.
Address
Mode
D7
D6
D5
D4
D3
D2
D1
D0
Base+0
RD
PAD7
PAD6
PAD5
PAD4
PAD3
PAD2
PAD1
PAD0
Base+1
RD
{0}
{0}
{0}
{0}
{0}
{0}
{0}
{0}
Base+2
RD/WR
PCD7
PCD6
PCD5
PCD4
PCD3
PCD2
PCD1
PCD0
Base+3
RD
{0}
{0}
{0}
{0}
{0}
{0}
{0}
{0}
Base+4
RD
{0}
{0}
{0}
{0}
{0}
{0}
{0}
{0}
Base+5
RD/WR
IRQEN
IRQST
{0}
{0}
{0}
{0}
IRC1
IRC0
Base+6
RD
{0}
{0}
{0}
{0}
{0}
{0}
{0}
{0}
Base+7
RD
{0}
{0}
{0}
{0}
{0}
{0}
{0}
{0}

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Programming the DIO-16, Continued
Interrupt Control
When enabled, interrupts are generated on Port A bit D0.
IRQEN
Interrupt enable
1 = enabled
0 = disabled ( 0 on power up )
IRC0
IRC1
Interrupt mode select, see table below
Interrupt mode select, see table below
Interrupt Mode Select Table
Interrupt source is Base+0 bit D0. When selecting the Interrupt Type, always disable interrupts prior to
changing or setting states. This will help prevent inadvertent or unexpected interrupts from occurring.
IRC1
IRC0
Interrupt Type
0
0
Low Level
0
1
High Level
1
0
Falling Edge
1
1
Rising Edge
When using the High and Low Level interrupts, an interrupt occurs when input D0 changes to
either a High or Low state. This will cause the computer to remain in an interrupt state until the
input state changes.
Interrupt Read
Reading the Interrupt Status port (Base+5) clears any interrupt pending.
IRQST
(D0) Interrupt Status
1 = interrupt pending, 0 = none

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Electrical Characteristics
Features
•Selectable I/O port addressing from 100H –3FFH
•1 set SPST relays with each set having 8 relays
•1 eight bit optically isolated input port
•Highly reliable 10 VA DIP reed relays
•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
10 –30 VDC/VAC
Output Relays
Contact Max Power Rating
10 W
Contact Voltage Maximum
100 VDC/VAC
Contact Current Maximum
.5A AC/DC RMS
Contact Resistance, Initial:
.15 Ω
Rated Life
Low Load: 200 million closures
Maximum Load: 100 million closures
Contact Speed
Operate: .5mS
Release: .5 mS
Bounce: .5 mS
Maximum Operating Speed
600 Hz
Temperature Range
Operating
0°C - 70°C
Storage
-50°C - 105°C
Power Consumption
Supply line
+5VDC
+12VDC
Rating
270 mA
(Optional)
Physical Dimensions
PCB Length
4.9” (12.4 cm)
PCB Height
4.2” (10.7 cm, including Gold fingers)
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
Output Circuit

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© Sealevel Systems, Inc. 3096H Manual | SL9026H 7/2021
Appendix A –Troubleshooting
Following these simple steps can eliminate most common problems.
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. 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 AM-5:00 PM Eastern Time Monday through Friday.
For email support contact supp[email protected].