SeaLevel SeaLINK PLC-16 User manual

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© Sealevel Systems, Inc. 8206 Manual | SL9015 7/2021
SeaLINK PLC-16
User Manual | 8206

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© Sealevel Systems, Inc. 8206 Manual | SL9015 7/2021
Contents
INTRODUCTION ................................................................................................................................................... 3
OTHER SEALEVEL USB TO DIGITAL I/O PRODUCTS ................................................................................................3
BEFORE YOU GET STARTED ...............................................................................................................................4
WHAT’S INCLUDED ................................................................................................................................................4
ADVISORY CONVENTIONS......................................................................................................................................4
OPTIONAL ITEMS ...................................................................................................................................................5
SOFTWARE INSTALLATION ................................................................................................................................6
WINDOWS INSTALLATION .....................................................................................................................................6
PHYSICAL INSTALLATION..................................................................................................................................7
PROGRAMMING THE SEALINK PLC-16 .............................................................................................................8
PROGRAMMING FOR WINDOWS...........................................................................................................................8
SAMPLES AND UTILITIES ........................................................................................................................................8
DIGITAL I/O INTERFACE..........................................................................................................................................8
SERIAL STRING .......................................................................................................................................................8
INPUT PORT ...........................................................................................................................................................9
OUTPUT PORTS (FORM C RELAYS) .......................................................................................................................10
ELECTRICAL CHARACTERISTICS.....................................................................................................................11
FEATURES.............................................................................................................................................................11
SPECIFICATIONS ...............................................................................................................................................12
INPUT PORTS .......................................................................................................................................................12
OUTPUT RELAYS...................................................................................................................................................12
TEMPERATURE RANGE ........................................................................................................................................12
MANUFACTURING ...............................................................................................................................................12
EXAMPLE CIRCUITS ..........................................................................................................................................13
APPENDIX A – TROUBLESHOOTING................................................................................................................14
APPENDIX B – HOW TO GET ASSISTANCE .....................................................................................................15
APPENDIX C – SILK SCREEN - 8206 PCB ........................................................................................................16
APPENDIX D – COMPLIANCE NOTICES ..........................................................................................................17
WARRANTY ........................................................................................................................................................18

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Introduction
The SeaLINK PLC-16 provides 8 Form C relays rated at 2A, making it suitable for latching power, data, or
other electronic signals for control applications. Eight optically isolated inputs (rated for 5-30V) are also
provided to allow monitoring off board switch closures, relays, or any other general purpose monitoring
needs. The adapter is USB 1.1 compliant.
The SEALINK PLC-16 is designed to be used under Windows 98/ME/2000/XP. The SeaI/O API (Application
Programmer Interface) included in Sealevel’s software provides a variety of useful high-level function calls
implemented in a Windows dynamic link library (DLL). This API gives access to the SeaLINK PLC-16 I/O
from Windows-based platforms such as Visual C++. In addition to the API, SeaI/O includes an ActiveX
control along with sample code and utilities to simplify software development.
Other Sealevel USB to Digital I/O Products
Model No. Part No. Description
SeaLINK DIO-16 (P/N 8209) - 8 Reed Relay Outputs/8 Opto-isolated Inputs
SeaLINK ISO-16 (P/N 8207) - 16 Opto-isolated Inputs
SeaLINK REL-16 (P/N 8208) - 16 Reed Relay Outputs
SeaLINK PIO-48 (P/N 8203) - 48 TTL Inputs/Outputs
SeaLINK PIO-96 (P/N 8205) - 96 TTL Inputs/Outputs

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Before You Get Started
What’s Included
The SeaLINK PLC-16 is shipped with the following items. If any of these items are missing or damaged,
please contact Sealevel for replacement.
•SeaLINK PLC-16 Adapter
•USB A to B Cable, Part# CA179
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 SeaLINK PLC-16 to real-world signals. All items can be purchased from our website
(www.sealevel.com) or by calling [phone].
•DIN Rail Clips (Part Number DR102)
A pair of brackets, clips, and hardware necessary for DIN rail mounting the SeaLINK PLC-16.
•2U 19” Rack Tray (Part Number RK2U)
Standard 2U rack tray for supporting SeaLINK and other devices.
•Clamp for Rack Tray (Part Number RK-CLAMP)
Metal clamp and necessary hardware to secure SeaLINK or other devices to the RK2U rack tray.
•High Speed USB 2.0 4-Port Hub (Part Number HUB4)
AC powered 4-port USB hub, AC adapter, and USB cable.
•High Speed USB 2.0 7-Port Hub (Part Number HUB7)
AC powered 7-port USB hub, AC adapter, and USB cable.

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Software Installation
Windows Installation
Do not connect the SeaLINK PIO-96 Adapter to the host USB device 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 [e-mail] 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 (#8206) for your adapter from the listing.
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. Go to the “Add New Hardware Wizard” in the Control Panel.
3. 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.”
4. 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.’
5. Click “Next.”
6. Select the card model and press “Next.”
7. The Wizard will guide you through a few more informational prompts; continue to click “Next” until
it is completed.
8. 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).
9. Windows software installation is complete.
Windows NT is not USB aware and thus cannot support the SeaLINK PIO-96.

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Physical Installation
The SeaLINK PIO-96 can be installed in any open USB port.
Do not plug the unit into a USB port until the software has been fully installed.
1. Simply connect the SeaLINK PIO-96 to your USB port with the supplied cable.
2. The software drivers installed during setup will automatically recognize and configure the device.
3. You should see one or more “New Hardware Found” windows, indicating the actual device being
created.
4. Next, view your system’s Device Manager.
5. You should have a new ‘SeaIO 8206’ in the SeaI/O Device heading indicating the installation was
successful.
The SeaLINK PLC-16 is now ready for use.

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Programming the SeaLINK PLC-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 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 SeaLINK PLC-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 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].
Digital I/O Interface
The SeaLINK PLC-16 provides two parallel input/output (I/O) ports. The ports are organized as ports A and
B. Port A is an input port interfaced to optically isolated inputs, while port B is the relay output port. The
SeaLINK PLC-16 is a line-powered device requiring a USB port capable of sourcing 500 mA.
Serial String
Each device has an eight digit alphanumeric serial string stored in non-volatile memory. On the Windows
platforms, this number is used to give each unit a separate identity. This identity allows the device to be
moved to any USB port or hub port on your computer while retaining its device number. If a device becomes
damaged and is replaced the new device should be given the same serial string as the device it is replacing.
This string is stored in an EEPROM along with other critical information. This EEPROM is read during
enumeration. The device should not be unplugged during its enumeration due to remote possibility that the
data in the EEPROM could be corrupted if power is removed during a read/write cycle to the EEPROM.
Enumeration is complete when the LED is lit.
The control panel utility provides the capability to read or modify this string. However, setting the same
string for two units connected to the same computer will cause the second unit to fail enumeration, and
make it invisible to the operating system. Should this occur, unplug one unit, and set the serial string for
the other unit to a different string.

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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 (2.7K ohm) 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 opto-isolator requires approximately 1mA 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 the ranges associated with the resistor.
Input Resistor Turn-On Input Range Max Input Max Current
2.7KW 3.0V 5 – 30V 37V 13mA
The turn off voltage for all resistors is less than 1V.
Because through hole resistors are utilized, they cannot be easily replaced. If modification is necessary,
Sealevel can do this for an additional charge.
The input circuits are not intended for monitoring 120-volt AC circuits. In addition to being too high
a voltage for the circuits, it is dangerous to have that high a voltage on the card.

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© Sealevel Systems, Inc. 8206 Manual | SL9015 7/2021
Output Ports (Form C Relays)
The SeaLINK PLC-16 provides 8 Form C (SPDT) Electro-mechanical relays. These relays have three
connections; Normally Open (NO), Normally Closed (NC) and a Common. The relays are all de-energized at
power-on. Writing a logic value of one or zero will change the state. Refer to the Application Programmers
Interface for more information. On/off status of the relays can be read back by any read operation in the
API.

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Electrical Characteristics
Features
•8 SPDT Form C relays
•Eight optically isolated inputs
•Removable screw terminals
•Powered by USB port

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Specifications
Input Ports
Turn On Current 1 mA
Isolator Diode Drop 1.1 VDC
Resistor Power Max .5 W
Maximum Input Range 5 – 30 VDC/VAC
Output Relays
Type Bifurcated, gold clad, silver palladium
Contact Max Power Rating 30 W DC/60 VA AC
Contact Voltage Maximum 60 VDC/VAC
Contact Current Maximum 2A AC/DC RMS
Contact Resistance, Initial .10 Ω
Rated Life Mechanical, minimum: 10 million closures
Electrical, minimum:5 million closures (Full Load)
Contact Speed
Operate: .2 mS
Release: .1 mS
Bounce: .7 mS
Temperature Range
Operating 0°C - 70°C
Storage -50°C - 105°C
Power Consumption
Supply line +5 VDC
Rating 500 mA
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
Form C Output Circuit

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© Sealevel Systems, Inc. 8206 Manual | SL9015 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.
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].

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© Sealevel Systems, Inc. 8206 Manual | SL9015 7/2021
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.

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© Sealevel Systems, Inc. 8206 Manual | SL9015 7/2021
Appendix C – Silk Screen - 8206 PCB

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© Sealevel Systems, Inc. 8206 Manual | SL9015 7/2021
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 users 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.

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Warranty
Sealevel's commitment to providing the best I/O solutions is reflected in the Lifetime Warranty that is
standard on all Sealevel manufactured I/O products. We are able to offer this warranty due to our control
of manufacturing quality and the historically high reliability of our products in the field. Sealevel products
are designed and manufactured at its Liberty, South Carolina facility, allowing direct control over product
development, production, burn-in and testing. Sealevel achieved ISO-9001:2015 certification in 2018.
Warranty Policy
Sealevel Systems, Inc. (hereafter "Sealevel") warrants that the Product shall conform to and perform in
accordance with published technical specifications and shall be free of defects in materials and
workmanship for the warranty period. In the event of failure, Sealevel will repair or replace the product at
Sealevel's sole discretion. Failures resulting from misapplication or misuse of the Product, failure to adhere
to any specifications or instructions, or failure resulting from neglect, abuse, accidents, or acts of nature
are not covered under this warranty.
Warranty service may be obtained by delivering the Product to Sealevel and providing proof of purchase.
Customer agrees to ensure the Product or assume the risk of loss or damage in transit, to prepay shipping
charges to Sealevel, and to use the original shipping container or equivalent. Warranty is valid only for
original purchaser and is not transferable.
This warranty applies to Sealevel manufactured Product. Product purchased through Sealevel but
manufactured by a third party will retain the original manufacturer's warranty.
Non-Warranty Repair/Retest
Products returned due to damage or misuse and Products retested with no problem found are subject to
repair/retest charges. A purchase order or credit card number and authorization must be provided in order
to obtain an RMA (Return Merchandise Authorization) number prior to returning Product.
How to obtain an RMA (Return Merchandise Authorization)
If you need to return a product for warranty or non-warranty repair, you must first obtain an RMA number.
Please contact Sealevel Systems, Inc. Technical Support for assistance:
Available Monday – Friday, 8:00AM to 5:00PM EST
Phone [phone]
Email [e-mail]
Trademarks
Sealevel Systems, Incorporated acknowledges that all trademarks referenced in this manual are the service
mark, trademark, or registered trademark of the respective company.