SeaLevel DIO-16.LCPI User manual

1
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
DIO-16.LCPI
User Manual | 8012

2
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Contents
CONTENTS...........................................................................................................................................................2
INTRODUCTION ...................................................................................................................................................3
BEFORE YOU GET STARTED ...............................................................................................................................5
SOFTWARE INSTALLATION ................................................................................................................................8
PHYSICAL INSTALLATION................................................................................................................................10
PROGRAMMING THE DIO-16.LPCI ...................................................................................................................12
SPECIFICATIONS ...............................................................................................................................................21
APPENDIX A –TROUBLESHOOTING................................................................................................................23
SEAIO DEVICE DRIVER CONFIGURATION ........................................................................................................30
APPENDIX B - HANDLING INSTRUCTIONS ......................................................................................................33
APPENDIX C –EXAMPLE CIRCUITS ................................................................................................................34
APPENDIX D –8012 PCB DRAWING ................................................................................................................35
APPENDIX E –HOW TO GET ASSISTANCE .....................................................................................................36
APPENDIX F –COMPLIANCE NOTICES...........................................................................................................37
WARRANTY ........................................................................................................................................................38

3
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Introduction
The DIO-16.LPCI provides 8 optically isolated inputs and 8 reed relay SPST (single pole-single throw)
outputs. The inputs 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 meets the requirements for the MD1 "Low Profile" specification as defined by the PCISIG in the
PCI 2.2 Specifications Low Profile Addendum. The DIO-16.LPCI also features Universal Bus (3.3 and 5.0V)
operation.
The DIO-16.LPCI is designed to be used with a variety of Operating Systems including Windows, Linux, and
DOS. The SeaI/O API (Application Programming Interface) provides a variety of useful high-level function
calls implemented as a Windows dynamic link library (.DLL) and as a Linux static library (.a). In addition to
the API, SeaI/O includes a device driver, sample code, and utilities to simplify software development.
Features
•Eight optically isolated inputs optimized for +5V
•Eight Reed relay outputs (SPST)
•Highly reliable 10VA Reed relays
•MD1 Low Profile and Universal Bus (3.3V and 5V) compatible
•Power (+5V and +12V) and ground provided on connector
•SeaI/O Classic software supports Windows and Linux Operating Systems

4
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Other Sealevel PCI Digital I/O Products
Product
Item#
Description
PIO-32.PCI
8010
32 TTL Inputs/Outputs
PIO-48.PCI
8005
48 TTL Inputs/Outputs
PIO-96.PCI
8009
96 TTL Inputs/Outputs
REL-16.PCI
8003
16 Reed Relay Outputs
DIO-32.PCI
8004
16 Reed Relay Outputs/16 Opto-isolated Inputs
DIO-32.PCI
8004H
16 Reed Relay Outputs/16 Opto-isolated Inputs (10-30V)
ISO-16.PCI
8006
16 Opto-isolated Inputs
ISO-16.PCI
8006H
16 Opto-isolated Inputs (10-30V)
REL-32.PCI
8007
32 Reed Relay Outputs
PLC-16.PCI
8011
8 Form C Relay Outputs/8 Opto-isolated Inputs
DIO-32.PCIE
8004e
16 Reed Relay Outputs/16 Opto-isolated Inputs
DIO-32.PCIE
8004He
16 Reed Relay Outputs/16 Opto-isolated Inputs (10-30V)

5
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Before You Get Started
What’s Included
The DIO-16.LPCI is shipped with the following items. If any of these items are missing or damaged,
please contact Sealevel for replacement.
•DIO-16.LPCI Adapter
•Item # 8012 ships with Low Profile PCI bracket
•Item# 8012S ships with a Standard PCI bracket
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.

6
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing the DIO-16.LPCI to real-world signals. All items can be purchased from our website
(http://www.sealevel.com) or by calling [phone].
Cables
DB44 Male to DB44 Female, 72” Extension Cable (Item# CA185)
The CA185 is a standard DB44M to DB44F extension cable.
Extend a DB44 cable or locate a piece of hardware where it is
needed with this six foot (72”) cable. The connectors are
pinned one-to-one, so the cable is compatible with any device
or cable with DB44 connectors. The cable is fully shielded
against interference and the connectors are molded to provide
strain relief. Dual metal thumbscrews secure the cable
connections and prevent accidental disconnection.
DB44 Male to BD37 Male, 72” Cable (Item# CA206)
DB44 Male to DB37 Male Cable, 72 in Length - for 8012. The
CA206 is useful for interfacing the DB44 connector on the
8012 to the DB37 connector on the TB02 terminal block.

7
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Terminal Blocks
Terminal Block –DB37 Male and DB37 Female to 27 Screw Terminals (Item# TB02)
CABLE & TERMINAL BLOCK KIT
The TB02 terminal block can be used to break out serial and
digital DB37 connectors to screw terminals for easy field
wiring. The terminal block was designed with both DB37 male
and female connectors, therefore; it can be used with any
DB37 board regardless of the board's port gender.
Terminal Block Kit –DB37 Male and DB37 Female to 27 Screw Terminals
(Item# TB02-KT)
The TB02-KT terminal block can be used to break out serial
and digital DB37 connectors to screw terminals for easy field
wiring. The terminal block was designed with both DB37
male and female connectors, therefore; it can be used with
any DB37 board regardless of the board's port gender. The
TB02-KT ships with a RoHS compliant TB02 terminal block, a
6 piece of slotted Snap Track, and two DIN-rail mounting
clips.
Terminal Block Kit –TB02 + CA206 Cable (Item# KT111)
CABLE & TERMINAL BLOCK KIT
The TB02 terminal block can be used to break out serial and
digital DB37 connectors to screw terminals for easy field
wiring. The terminal block was designed with both DB37 male
and female connectors, therefore; it can be used with any
DB37 board regardless of the board's port gender.
Reference Book
The Digital I/O Handbook –A Practical Guide to Industrial Input and Output
Applications (Item# REF101)
Renowned technical author Jon Titus and president and CEO
of Sealevel Systems, Tom O'Hanlan, clearly explain real-world
digital input/output implementation from both a hardware and
software perspective. Whether you are a practicing engineer
or a student, The Digital I/O Handbook will provide helpful
insight you will use again and again.

8
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Software Installation
This section contains helpful information pertaining to the installation of supported Sealevel Systems, Inc.
software packages. First, the process of acquiring the software is discussed. Next, the installation is
detailed in a step-by-step guide for Windows and Linux operating systems.
WHERE TO GET SEALEVEL SOFTWARE
All Sealevel products are shipped with media containing the installers for each software package available.
If the media is otherwise unavailable or if desired, the current versions of Sealevel software packages can
be obtained from the Sealevel website (see following instructions). If you already have the Sealevel
software, proceed to the Windows or Linux installation section.
1. Sealevel software for Windows and Linux operating systems is available at these links:
•Software for Windows
•Software for Linux
2. Choose the link for the desired software package and click on the ‘Download File’ link to
download the current driver.
3. Proceed to the Manual Software Installation guide for your operating system.
WINDOWS INSTALLATION
Do not connect the hardware until the software has been successfully installed.
To install Sealevel software, you must log in as an administrator or have administrator privileges
in the Windows.

9
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Linux Installation
Most Sealevel Linux software is distributed as source code. To use the software, it must be
compiled. Refer to the README file in each package for system prerequisites.
You must have administrative privileges to install the software. It is not necessary to have
administrative privileges to build or use the software.
All command syntax is case sensitive.
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 (8012) for your adapter from the listing.
3. Select ‘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. At this point, the driver has enabled the hardware and it is ready to use. You now have the option
to run a test utility on it.

10
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Physical Installation
The Sealevel adapter can be installed in an ISA/PCI/PCIe expansion slot.
5V keyed PCI cards will not fit or work in 3.3V keyed PCI slots
ISA Card Edge (5V)
PCI Bus Card Edge (5V)
Universal PCI Bus Card Edge (3.3 and 5V)
PCI Express x1
Do not install the adapter in the machine until the product software has been fully installed.
To prevent damage from improper handling, please reference Appendix A –ESD Handling
Instructions.

11
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Physical Installation, Continued
1. Turn off PC power. Disconnect the power cord.
2. Remove the PC case cover.
3. Locate an available ISA/PCI/PCIe slot and remove the blank metal slot cover.
4. Gently insert the ISA/PCI/PCIe 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.LCPI is now ready for use.

12
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Programming the DIO-16.LPCI
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.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.
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 DIO-16.LPCI provides. The DIO-16.LPCI provides two parallel
input/output (I/O) ports. The ports are organized as ports A and C. Port A is an input port interfaced to
optically-isolated inputs, while port C is the reed relay output port.

13
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Programming the DIO-16.LPCI, Continued
Register Layout
Reference the following sections for more information about the meaning and use of the registers
available.
Address
Mode
Mode
D7
D6
D5
D4
D3
D2
D1
D0
Base+0
Input Port A
RD
PAD7
PAD6
PAD5
PAD4
PAD3
PAD2
PAD1
PAD0
Base+2
Output Port C
RD/WR
PCD7
PCD6
PCD5
PCD4
PCD3
PCD2
PCD1
PCD0
Base+5
Interrupt Status
RD/WR
IRQEN
IRQST
0
0
0
0
IRC1
IRC0
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.
When using the API, the actual value is returned not the complement of the value.
Writing the Outputs
The output ports are the only ports that can be written. The relays on a standard DIO-16.LPCI are normally
open. To close a relay a one must be written to the appropriate bit.
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

14
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Programming the DIO-16.LPCI, Continued
Interrupt Mode Select Table
Interrupt source is Base+5 bits D1 and 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. 8012 Manual | SL9018 3/2022
Programming the DIO-16.LPCI, Continued
Input Ports
Port A is an 8 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 is 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 560 ohms (factory default). The opto-isolator
requires approximately 3mA to turn on. The maximum input current is 20mA.
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 Port Pin Assignments (DB-44 Female)
Port A Bit
Port A Pins
0
2,40
1
3,41
2
4,36
3
5,37
4
6,38
5
7,42
6
8,43
7
9,44

16
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Programming the DIO-16.LPCI, Continued
The above diagram is representative of how dry contact inputs (or current / voltage sources) can be
monitored by the optically isolated inputs. When switch 1 above is closed, it will allow current to flow from
the power source, into pin 3 of the DB-44, through the optocoupler, out pin 41, and back to the power source.
If the current flow is between 3 and 20 milliamps, this input will be read as logic “0”. All the input associated
with all open switches will be read as logic “1”.
In the diagram above, pins 36-38, and 40-44 are joined, providing a common return path for the
optocouplers. In this case, the interconnections are being made on the connector itself. In the DB-37
diagram below the return path is supplied external to the connector. Also, for complete electrical isolation,
each input / output pair can be powered from an individual power source with no common present.
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.

17
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Programming the DIO-16.LPCI, Continued
Output Ports (Reed Relay) Pin Assignments (DB-44 Female)
Port C Bit
Relay
Port C Pins
0
K3
10,28
1
K2
11,29
2
K1
12,30
3
K5
13,31
4
K4
14,32
5
K6
15,33
6
K7
16,34
7
K8
17,35
The above diagram is representative of how lights (or other devices) can be controlled by the relay outputs.
When relay 2 on the card is closed, it will allow current to flow from the power source, into pin 12 of the DB-
44, through the relay, out pin 30, and back to the power source thereby turning the light labeled “2” on.
In the diagram above, pins 28-30 and 31-35 of the connector are joined, providing a common return path
for the circuit. In this case the interconnections are being made on the connector itself. In the DB-37
diagram below the return path is supplied external to the connector. For complete electrical isolation, each
relay can be wired to an independent isolated circuit.

18
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Programming the DIO-16.LPCI, Continued
Power and Ground Pin Assignments (DB-44 Female)
Ground
22,23,24
+ 5 Volts
39
+ 12 Volts
1
DB-37 Male Pin Assignment
Via optional DB-44 Male to DB-37 Male 6’ cable, Part Number CA206
Bit
Port A Pins
Port C Pins
0
2,20
10,28
1
3,21
11,29
2
4,22
12,30
3
5,23
13,31
4
6,24
14,32
5
7,25
15,33
6
8,26
16,34
7
9,27
17,35
GND
18,36,37
+12V
1
+5V
19

19
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Programming the DIO-16.LPCI, Continued
The diagram is representative of how dry contact inputs (or current / voltage sources) can be monitored by
the optically isolated inputs. When switch 1 above is closed, it will allow current to flow from the power
source, into pin 3 of the DB-37, through the optocoupler, out pin 21, and back to the power source. If the
current flow is between 3 and 50 milliamps, this input will be read as logic “0”. All the input associated with
all open switches will be read as logic “1”.
The above diagram shows that the common path to the optocouplers is provided external to the connector.
The common path can be provided at the connector as shown in the DB-44 diagram above. Also, for
complete electrical isolation, each input / output pair can be powered from an individual power source with
no common present.

20
© Sealevel Systems, Inc. 8012 Manual | SL9018 3/2022
Programming the DIO-16.LPCI, Continued
The diagram above diagram is representative of how lights (or other devices) can be controlled
by the relay outputs. When relay 2 on the card is closed, it will allow current to flow from the
power source, into pin 12 of the DB-37, through the optocoupler, out pin 30, and back to the
power source thereby turning the light labeled “2” on.
The above diagram shows the common path to all the relays is provided external to the connector.
The common path can be provided at the connector as shown in the DB-44 diagram above. For
complete electrical isolation, each relay can be wired to an independent isolated circuit.