SeaLevel SeaI/O-270U User manual

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© Sealevel Systems, Inc. 270U Manual | SL9179 12/2022
Optically Isolated 7-Port USB Hub
with SeaLATCH USB Ports
User Manual | 270U

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© Sealevel Systems, Inc. 270U Manual | SL9179 12/2022
Contents
CONTENTS...........................................................................................................................................................2
SAFETY INSTRUCTIONS ..................................................................................................................................... 3
INTRODUCTION ................................................................................................................................................... 4
BEFORE YOU GET STARTED ...............................................................................................................................5
INSTALLATION ....................................................................................................................................................7
HARDWARE DESCRIPTION ................................................................................................................................. 8
SEALATCH® USB ..............................................................................................................................................10
MOUNTING OPTIONS........................................................................................................................................12
TECHNICAL SPECIFICATIONS..........................................................................................................................13
APPENDIX A – TROUBLESHOOTING................................................................................................................14
APPENDIX B – HOW TO GET ASSISTANCE .....................................................................................................15
APPENDIX C – SILK SCREEN – SEAI/O-270U PCB .........................................................................................16
APPENDIX D – 270U BOARD MOUNTING OUTLINE........................................................................................17
APPENDIX E – COMPLIANCE NOTICES...........................................................................................................18
WARRANTY ........................................................................................................................................................19

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Safety Instructions
Electrostatic Discharges (ESD)
A sudden electrostatic discharge can destroy sensitive components. Proper packaging and earthing
rules must therefore be observed. Always take the following precautions.
•Transport boards and cards in electrostatically secure containers or bags.
•Keep electrostatically sensitive components in their containers, until they arrive at an
electrostatically protected workplace.
•Only touch electrostatically sensitive components when you are properly earthed.
•Store electrostatically sensitive components in protective packaging or on anti-static mats.
Grounding Methods
The following measures help to avoid electrostatic damages to the device:
•Cover workstations with approved antistatic material. Always wear a wrist strap
connected to workplace as well as properly grounded tools and equipment.
•Use antistatic mats, heel straps, or air ionizers for more protection.
•Always handle electrostatically sensitive components by their edge or by their casing.
•Avoid contact with pins, leads, or circuitry.
•Turn off power and input signals before inserting and removing connectors or connecting
test equipment.
•Keep work area free of non-conductive materials such as ordinary plastic assembly aids
and Styrofoam.
•Use field service tools such as cutters, screwdrivers, and vacuum cleaners which are
conductive.
•Always place drives and boards PCB-assembly-side down on the foam.

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Introduction
The SeaI/O-270U is an optically isolated 7-port USB hub that protects the host computer from spikes,
surges and ground loops commonly found in industrial environments. The hub is powered by an industrial
grade wall-mount power supply providing a full 500mA to each attached USB peripheral. The SeaI/O-270U
is ideal for adding USB ports to a SeaPAC touchscreen HMI system, a Relio R1000 embedded solid-state
industrial computer, or a SeaI/O data acquisition “stack”.
The SeaI/O-270 integrates SeaLATCH USB ports, which are fully compatible with standard USB cables.
When used with the included USB cable with a SeaLATCH type B USB connector, the metal thumbscrew
provides a secure metal-to-metal connection to the hub and prevents accidental cable disconnection. The
hub’s seven SeaLATCH type A USB connectors can secure USB peripherals to the hub in the same way.
Additionally, a highly-retentive type B USB connector helps prevent unintentional separation from a
standard USB cable.
Features
•Provides 1500 VAC isolation on upstream USB port
•Includes 7 USB downstream ports with 500mA available per port
•SeaLATCH USB connectors provide locking connection
•Native support in Windows 98SE/ME/2000/XP/Vista/7™, and Linux kernel v2.4 operating systems
•Status LEDs indicate external power, connection to host, and fault condition
•High-retention USB type “B” connector prevents accidental disconnection of standard USB cable

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Before You Get Started
What’s Included
The SeaI/O-270U is shipped with the following items. If any of these items is missing or damaged, please
contact Sealevel for replacement.
•SeaI/O-270U – SeaI/O 7-Port Isolated USB Hub
•CA356 – USB Type A to SeaLATCH USB Type B Cable, 6’ in Length
•TR123 – 12VDC @ 2.5A Wall-Mount Power Supply
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 with the
SeaI/O-270U. All items can be purchased from our website or by calling [phone].
SeaLATCH USB Type A and Type B Device Cable, 72” (Item# CA332)
The CA332 is a USB device cable with SeaLATCH USB type A and type B
connectors. The metal thumbscrew on each connector provides a secure
metal-to-metal connection to devices with SeaLATCH USB ports.
SeaLATCH USB Type A to USB Type B Device Cable, 72” (Item# CA355)
The CA355 is a USB device cable with a SeaLATCH USB type A connector and
standard type B connector. This cable secures the HUB7M to legacy USB
peripheral devices.
USB Type A to SeaLATCH Type B Device Cable, 72” (Item# CA356)
The CA356 is a USB device cable with a SeaLATCH USB type B connector and
standard type A connector. This cable is included with all Sealevel USB
products with an integrated SeaLATCH type B USB port.
USB Type A to USB Type A, 3 Meter Extension Cable (Item# CA214)
The CA214 is a fully rated USB extension cable that adds three meters to any
existing USB cable (maximum 5 meters). The CA214 has a type A male
connector on one end and a type A female connector on the other end.
USB Type A to USB Type B, 72” Device Cable (Item# CA179)
The CA179 is a 72" USB device cable that connects USB peripherals with a
Type B connector to the Type A connector on a host computer. The CA179 is
USB 2.0 compliant and is compatible with USB 1.1 and 1.0 devices.
USB Type A to USB Type B, 5 Meter Device Cable (Item# CA215)
The CA215 is a fully rated 5 meter device cable that connects USB peripherals
with a type B connector to the type A connector on a host PC. This cable
provides the maximum 5 meters (16 feet) for a USB connection.

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Installation
Windows 98/ME/2000/XP/Vista/7™ Operating Systems
1. The SeaI/O-270U is fully supported as a generic USB hub device in Windows
98/ME/2000/XP/Vista/7™ operating systems and requires no separate driver.
2. Simply connect the included wall-mount power supply to the SeaI/O-270U and connect to an AC
outlet.
3. Using the included SeaLATCH USB device cable, plug the SeaI/O-270U into an available USB port
on your host system.
4. The ‘Found New Hardware’ screen will appear, and the hub will be automatically recognized as a
generic USB hub device.
5. The hub is ready to use when you see the screen ‘Your USB hub is installed and ready to use.’
Windows NT is not USB aware and thus cannot support this device.
Linux Support
USB devices are supported to Linux kernel v2.4 or better. Refer to the help files included with your Linux
distribution for specific instructions on adding generic USB hub devices.

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Hardware Description
Optical Isolation
The SeaI/O-270U is an optically isolated USB hub that connects up to seven USB peripherals while
protecting the host computer from voltages up to 1500 VAC. This protects the host computer from
potentially damaging voltage spikes, power surges, and ground loops commonly found in industrial and
OEM applications.
USB Ports
The SeaI/O-270U integrates SeaLATCH USB ports, which are fully compatible with standard USB cables.
When used with the included USB cable with a SeaLATCH type B USB connector, the metal thumbscrew
provides a secure metal-to-metal connection to the hub and prevents accidental cable disconnection.
Additionally, a highly-retentive type B USB connector helps prevent unintentional separation from a
standard USB cable. The SeaLATCH type B locking connector and high retention type B port are shown
below.
The hub’s seven SeaLATCH type A locking USB connectors can secure USB peripherals to the hub in the
same way. Two of the SeaLATCH type A USB ports are shown below. Each of the seven downstream
type A USB ports provides a full 500mA to USB peripherals.

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Status LEDs
Status LEDs are also included on the front of the SeaI/O-270U module to indicate the following
information:
•ENABLE (Yellow) – Lights when the USB hub is enumerated by the host system.
•FAULT (Red) – Lights when there is a problem with a downstream USB port. Disconnect the
downstream devices one at a time until the status returns to normal.
•EXT POWER (Green) – Indicates the external power supply is properly connected to the hub and
an AC power source.
External Power
The SeaI/O-270U includes an industrial grade wall-mount power supply (Item# TR123) that outputs 12VDC
@ 2.5A. Power is input via a 5mm 2-position removable screw terminal block (shown below). To prevent
accidental disruption of power, the terminal block includes mounting screws for securing to the hub.

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SeaLATCH® USB
The SeaI/O-270 integrates SeaLATCH USB ports, which are fully compatible with standard USB cables.
When used with the included USB cable (Item# CA356) with a SeaLATCH USB Type B connector, the metal
thumbscrew provides a secure metal-to-metal connection to the hub and prevents accidental cable
disconnection.
The hub’s seven SeaLATCH Type A USB connectors can secure USB peripherals to the hub in the same
way. Sealevel incorporates SeaLATCH locking USB ports on many USB I/O devices. Accidental cable
disconnection is the most common point of failure with USB industrial I/O devices and SeaLATCH cables
and connectors prevents that while being fully compatible with standard USB cables.
Examples of the SeaI/O-270U with SeaLATCH equipped Sealevel I/O devices are shown below.

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SeaLATCH Locking USB Cables
SeaLATCH locking USB cables integrate a small thumbscrew into each USB connector. SeaLATCH USB
cables are fully interchangeable with standard USB cables. The thumbscrew provides a secure metal-to-
metal connection preventing accidental disconnection. SeaLATCH USB cables are available in three
configurations.
USB Type A to SeaLATCH USB Type B Device Cable, 72 in Length (Item# CA356)
The CA356 is a 72” USB cable with a SeaLATCH type B
connector and a standard USB type A connector. This cable
provides a secure connection between Sealevel products
with a SeaLATCH type B port and legacy USB type A ports.
The CA356 is included with Sealevel devices with a
SeaLATCH type B port.
SeaLATCH USB Type A to SeaLATCH USB Type B Device Cable, 72 in Length (Item# CA332)
The CA332 is a 72” cable with both SeaLATCH type A and B
connectors. This cable secures both ends of the cable to
devices with SeaLATCH USB ports and offers complete
protection against accidental cable disconnection.
SeaLATCH USB Type A to USB Type B Device Cable, 72 in Length (Item# CA355)
The CA355 is a 72” cable with a standard USB type B and a
SeaLATCH type A connector. This cable provides a secure
connection between legacy USB devices and Sealevel
products with a SeaLATCH type A port, such as the isolated
USB hub (Item# 270U).

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Mounting Options
SeaI/O Mounting Kit
The HUB7M is ideal for adding USB ports to a Relio R1000 embedded solid-state
industrial computer (as shown), SeaPAC touchscreen HMI system, or a SeaI/O
data acquisition “stack”. Order the expansion kit (Item# KT122) that includes
four metal straps and four #4-40 metal screws.
DIN Rail Mounting
The HUB7M is available with a factory-installed DIN-
rail mounting clip.
Alternatively DIN-rail mounting clips can be ordered as a field upgrade kit (Item#
DR104). The bracket with clip is easily attached using two included #4-40
Phillips head machine screws.
Table/Wall Mounting
The flush mount bracket kit (Item# KT123)is extremely versatile and can be
used to mount the HUB7M from the top, bottom, or back edge. The hub alone
or with a stack of SeaI/O modules can be mounted flat to a tabletop, underneath
a counter, or inside an enclosure. The kit can be used to mount the hub flat to a
wall, or along the back edge, similar to DIN-rail mounting options.
Universal Mounting Bracket
The universal mounting bracket (Item# KT125) can be used as a “backpack” to
other USB peripheral devices to the HUB7M. The universal arrangement of slots
and holes accept bolt sizes to M4 and can be used for virtually any mounting
configuration. The bracket also has holes for both 75mm and 100mm VESA
mounting options.

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Technical Specifications
Power Consumption
Supply line +9-30 VDC
Rating 20W (Minimum)
Physical Dimensions
Board length 7.5 inches (19.05 cm)
Board width 5.1 inches (12.95 cm)
Board height excluding Goldfingers 1.2 inches (3.30 cm)
Weight
1.0 lbs/.46 kg
Environmental Specifications
Specification Operating Storage
Temperature Range 0º to 70º C (32º to 158º F) -50º to 105º C (-58º to 221º F)
Humidity Range 10 to 90% R.H. Non-Condensing 10 to 90% R.H. Non-Condensing
Manufacturing
All Sealevel 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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Appendix A – Troubleshooting
The adapter should provide years of trouble-free service. However, in the event that device appears to not
be functioning incorrectly, the following tips can eliminate most common problems without the need to call
Technical Support.
1. Read this manual thoroughly before attempting to install the adapter in your system.
2. Use Device Manager under Windows to verify proper installation.
3. Use the SeaI/O control panel applet for card identification and configuration.
4. Identify all I/O adapters currently installed in your system. This includes your on-board serial ports,
controller cards, sound cards etc. The I/O addresses used by these adapters, as well as the IRQ (if
any) should be identified.
5. Configure your Sealevel Systems adapter so that there is no conflict with currently installed
adapters. No two adapters can occupy the same I/O address.
6. Make sure the Sealevel Systems adapter is using a unique IRQ The IRQ is typically selected via an
on-board header block. Refer to the section on Card Setup for help in choosing an I/O address and
IRQ.
7. Make sure the Sealevel Systems adapter is securely installed in a motherboard slot.
8. If you are utilizing an operating system prior to Windows 7, please contact Sealevel‘s Technical
support as directed below to receive more information regarding the utility software which will
determine if your product is functioning properly.
9. Only users running Windows 7 or newer should utilize the diagnostic tool ‘WinSSD’ installed in the
SeaCOM folder on the Start Menu during the setup process. First find the ports using the Device
Manager, then use ‘WinSSD’ to verify that the ports are functional.
10. Always use the Sealevel Systems diagnostic software when troubleshooting a problem. This will
help eliminate any software issues and identify any hardware conflicts.
If these steps do not solve your problem, please call Sealevel Systems’ Technical Support, [phone].
Our technical support is free and available from 8:00 A.M.- 5:00 P.M. Eastern Time Monday through Friday.
For email support contact [e-mail].

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Appendix B – How To Get Assistance
Please refer to Troubleshooting Guide prior to calling Technical Support.
1. Begin by reading through the Trouble Shooting Guide in Appendix A. If assistance is still needed,
please see below.
2. When calling for technical assistance, please have your user manual and current adapter
settings. If possible, please have the adapter installed in a computer ready to run diagnostics.
3. Sealevel Systems provides an FAQ section on its web site. Please refer to this to answer many
common questions. This section can be found at http://www.sealevel.com/faq.asp.
4. Sealevel Systems maintains a web page on the Internet. Our home page address is
https://www.sealevel.com/. The latest software updates, and newest manuals are available
via our web site.
5. Technical support is available Monday to Friday from 8:00 A.M. to 5:00 P.M. Eastern Time.
Technical support can be reached at [phone].
RETURN AUTHORIZATION MUST BE OBTAINED FROM SEALEVEL SYSTEMS BEFORE RETURNED
MERCHANDISE WILL BE ACCEPTED. AUTHORIZATION CAN BE OBTAINED BY CALLING SEALEVEL
SYSTEMS AND REQUESTING A RETURN MERCHANDISE AUTHORIZATION (RMA) NUMBER.

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Appendix C – Silk Screen – SeaI/O-270U PCB

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Appendix D – 270U Board Mounting Outline

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Appendix E – 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.