SeaLevel DIO-32B User manual

1
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
DIO-32B
User Manual | 3093H

2
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Contents
CONTENTS...........................................................................................................................................................2
INTRODUCTION ................................................................................................................................................... 3
BEFORE YOU GET STARTED ...............................................................................................................................4
CARD SETUP ........................................................................................................................................................6
SOFTWARE INSTALLATION................................................................................................................................8
PHYSICAL INSTALLATION..................................................................................................................................9
PROGRAMMING THE DIO-32B..........................................................................................................................10
ELECTRICAL CHARACTERISTICS.....................................................................................................................15
SPECIFICATIONS ...............................................................................................................................................15
EXAMPLE CIRCUITS ..........................................................................................................................................17
APPENDIX A – TROUBLESHOOTING................................................................................................................18
APPENDIX B – HOW TO GET ASSISTANCE .....................................................................................................19
APPENDIX C – SILK SCREEN – 3093H PCB ....................................................................................................20
APPENDIX D – COMPLIANCE NOTICES ..........................................................................................................21
WARRANTY ........................................................................................................................................................22

3
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Introduction
The DIO-32B digital I/O interface provides 16 optically isolated inputs and 16 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 close when energized.
The DIO-32B 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) available for the
DIO-32B 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
DIO-16 (P/N 3096) - 8 Reed Relay Outputs / 8 Opto-Isolated Inputs
ISO-16 (P/N 3094) - 16 Optically Isolated Inputs
REL-16 (P/N 3095) - 16 Reed Relay Outputs
REL-32 (P/N 3098) - 32 Switched Relay Outputs
PIO-48 (P/N 4030) - 48 TTL Inputs/Outputs

4
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Before You Get Started
What’s Included
The DIO-32B is shipped with the following items. If any of these items is missing or damaged, please
contact Sealevel for replacement.
•Item# 3093H – DIO-32B ISA Adapter
•Item# CA111 – 6” Ribbon Cable with IDC 20-Pin to DB-37 Male
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. 3093H Manual | SL9024H 12/2022
Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing the DIO-32B 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 Extension Cable - (Item# CA112)
−This cable provides a 6’ extension to the CA165.
It has one DB37 Male connector and one DB37
Female connector.
•DB-37 Male/Female Terminal Block (Item# TB02-KT)
−Break out serial and digital connectors to screw
terminals for easy field connection. The TB02
terminal block is designed with both DB37 male
and female connectors, therefore; it can be
used with any DB37 board regardless of the
board's port gender.
•Cable and Terminal Block Kit (Item# KT101)
−The KT101 includes the TB02 terminal block
and CA112 cable. To fully connect the DIO-32B
two KT101 kits will be required.

6
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Card Setup
The DIO-32B contains several jumper straps for each port that must be set for proper operation.
Address Selection
The DIO-32B 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.
12 3 4 5 6 7
ON
OFF
A9 A2
8
DIP-Switch Illustration
The Setting the switch ‘On’ or ‘Closed’ corresponds to a ‘0’ in the address, while leaving it ‘Off’ or ‘Open’
corresponds to a ‘1’.

7
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
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

8
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
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 [email protected] to
receive access to the legacy driver download and installation instructions.
1. Select the download for the SeaIO Classic for Windows (Software: SeaIO Classic V5 - Windows
- Sealevel.) 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.
2. 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.
3. 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 software installation is complete.
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.
Linux Software: You may download the SeaIO Classic for Linux Windows for the 3093H. If you need
additional information with this installation, please contact Sealevel’s Technical Support:
[email protected].

9
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Physical Installation
The adapter can be installed in any 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-32B is now ready for use.

10
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Programming the DIO-32B
Sealevel’s SeaI/O software is available to assist in the development of reliable applications for the Sealevel
Systems family of digital I/O adapters. Included in Sealevel’s software and drivers 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-32B. 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 in the software
for the SeaI/O. Further documentation on these samples can be found by selecting
“Start/Programs/SeaIO/Sample Application Description.” If you have any problems locating these files,
please contact Sealevel’s Technical Support at 864-843-4343 or email [e-mail].
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 3093H specifically. Complete documentation of the API can be found in its accompanying help file.
Digital I/O Interface
The DIO-32B provides four parallel input/output (I/O) ports. The ports are organized as ports A, B, C, and D.
Port A and B are input ports interfaced to optically isolated inputs, while ports C and D are reed relay output
ports. 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
Reed Relay Output Port

11
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
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 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))
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.
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.

12
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Sensor Input Ports Pin Assignments
Inputs are interfaced via the DB-37 female connector on card.
Output Ports (Reed Relay)
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 Ports (Reed Relay) Pin Assignments (CA111)
Outputs are interfaced via the DB-37 male connector on the supplied connector cable (item# CA111).
Port C Bit Relay Port C Pins Port D Bit Relay Port D Pins
0 K16 2,20 0 K8 10,28
1 K15 3,21 1 K7 11,29
2 K14 4,22 2 K6 12,30
3 K13 5,23 3 K5 13,31
4 K12 6,24 4 K4 14,32
5 K11 7,25 5 K3 15,33
6 K10 8,26 6 K2 16,34
7 K9 9,27 7 K1 17,35
Ground 18,36,37
+ 5 Volts 19
+ 12 Volts 1
Port A Bit
Port A Pins
Port B Bit
Port B Pins
0
18,37
0
10,29
1
17,36
1
9, 28
2
16,35
2
8,27
3
15,34
3
7,26
4
14,33
4
6,25
5
13,32
5
5,24
6
12,31
6
4,23
7
11,30
7
3,22
Ground
2,20,21
+12 Volts
19
+5 Volts
1

13
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
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.
Direct Hardware Control
In systems where the users program has direct access to the hardware (DOS) the tables that follow give
the mapping and functions that the DIO-32B provides.
Function Available
Port
Address Hex
Port Type
RD
A
Base + 0
RD
B
Base + 1
Optically Isolated Input Port
RD/WR
C
Base + 2
RD/WR
D
Base + 3
Reed Relay Output Port
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-32B are normally
open. To close a relay a one must be written to the appropriate bit.

14
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
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
Input Port A
RD
PAD7
PAD6
PAD5
PAD4
PAD3
PAD2
PAD1
PAD0
Base+1
Input Port B
RD
PBD7
PBD6
PBD5
PBD4
PBD3
PBD2
PBD1
PBD0
Base+2
Output Port C
RD/WR
PCD7
PCD6
PCD5
PCD4
PCD3
PCD2
PCD1
PCD0
Base+3
Output Port D
RD/WR
PDD7
PDD6
PDD5
PDD4
PDD3
PDD2
PDD1
PDD0
Base+4
RD
0
0
0
0
0
0
0
0
Base+5
Interrupt Status
RD/WR
IRQEN
IRQST
0
0
0
0
IRC1
IRC0
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

15
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Electrical Characteristics
•Selectable I/O port addressing from 100H – 3FFH
•2 sets SPST relays with each having 8 relays
•2 eight bit input ports
•Highly reliable 10 VA DIP reed relays
•Multiple adapters can reside in same computer
•All address, data and control signals are TTL compatible
Specifications
Input Ports
Turn On Current: 3mA
Isolator Diode Drop: 1.1 VDC
Resistor Power Max: .25W
Maximum Input Range: 10 – 30 VDC/VAC
Outputs 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:
Maximum Load:
200 Million Closures
100 Million Closures
Contact Speed:
Operate:
Release:
Bounce:
.5 mS
.5 mS
.5 mS
Maximum Operating Speed: 600Hz

16
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Temperature Range
Operating 0°C - 70°C
Storage -50°C - 105°C
Power Requirements
Supply line +5 VDC +12 VDC
Rating 800 mA 50 mA
Physical Dimensions
PCB Length: 9.8 Inches (24.8 cm)
PCB Height: 4.2 inches (10.7 cm, including Goldfingers)
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.

17
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Example Circuits
Input Circuit
Output Circuit

18
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
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 Monday through Friday from 8:00 AM - 5:00 PM, Eastern Time.
For email support contact [e-mail].

19
© Sealevel Systems, Inc. 3093H Manual | SL9024H 12/2022
Appendix B – How To Get Assistance
Begin by reading through the Troubleshooting Guide in Appendix A. If assistance is still needed, please see
below.
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.
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.
Sealevel Systems maintains a Home page on the Internet. Our home page address is 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 AM to 5:00 PM, Eastern Time. Technical support
can be reached at [phone]. For email support contact [e-mail].
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. 3093H Manual | SL9024H 12/2022
Appendix C – Silk Screen – 3093H PCB
9.75"
4.2"
3.9"