SeaLevel SeaLINK DIN Rail USB Series User manual

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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
SeaLINK USB Serial Manual
User Manual | SeaLINK DIN Rail USB Serial Family

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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
Contents
CONTENTS............................................................................................................................................................................................................................2
INTRODUCTION...................................................................................................................................................................................................................3
BEFORE YOU GET STARTED..............................................................................................................................................................................................4
HARDWARE DESCRIPTION ...............................................................................................................................................................................................6
SEALATCH™USB ...............................................................................................................................................................................................................8
HARDWARE CONFIGURATION.......................................................................................................................................................................................10
SOFTWARE INSTALLATION .............................................................................................................................................................................................15
HARDWARE INSTALLATION.............................................................................................................................................................................................17
CONNECTOR PIN ASSIGNMENTS ..................................................................................................................................................................................18
MOUNTING OPTIONS .......................................................................................................................................................................................................19
SPECIFICATIONS...............................................................................................................................................................................................................20
APPENDIX A –TROUBLESHOOTING.............................................................................................................................................................................21
APPENDIX B –HOW TO GET ASSISTANCE..................................................................................................................................................................22
APPENDIX C –ELECTRICAL INTERFACE......................................................................................................................................................................23
APPENDIX D –ASYNCHRONOUS COMMUNICATIONS.............................................................................................................................................24
APPENDIX E –SILK SCREEN ..........................................................................................................................................................................................25
APPENDIX F –COMPLIANCE NOTICES.........................................................................................................................................................................26
WARRANTY ........................................................................................................................................................................................................................ 27

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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
Introduction
Overview
SeaLINK DIN Rail USB serial interface adapters are the perfect way to add RS-232, RS-422, or RS-485 serial
peripherals such as barcode scanners, serial displays, and data acquisition modules to any USB port.
Offering one or two DB9M serial ports, models are available for RS-232, RS-422/485, and RS-232/422/485
interfaces. Serial ports are configurable via dip switches accessible through the case. There is never a
need to open the enclosure, which simplifies field installation and service.
Optically isolated models prevent damage caused by surges and ground loops commonly found in
industrial environments. Status LEDs display transmit and receive activity, and data rates up to 921.6K bps
are supported.
The serial ports appear as standard COM ports to the host computer enabling compatibility with legacy
software. SeaLINK USB serial interface adapters are USB bus powered, eliminating the need for external
power supplies.
All models integrate the patent-pending SeaLATCH USB port, which is fully compatible with standard USB
cables. When used with the included USB cable with a SeaLATCH USB type B connector, the metal
thumbscrew provides a secure connection to the device and prevents accidental cable disconnection.
Ready for DIN rail mounting, SeaLINK USB serial interface adapters include a removable plastic clip that
snaps onto 35mm DIN rail. The clip can also be attached to a wall, under a counter, or inside a panel with
optional screws.
Sealevel DIN Rail USB Serial Adapters Family
This manual covers the installation and operation of these devices:
Product
Part No.
Description
SeaLINK+Multi.DIN
(P/N 2109)
- 1 Port RS-232/422/485
SeaLINK+232I.DIN
(P/N 2111)
- 1 Port Isolated RS-232
SeaLINK+485I.DIN
(P/N 2112)
- 1 Port Isolated RS-422/485
SeaLINK+I.DIN
(P/N 2113)
- 1 Port Isolated RS-232/422-485
SeaLINK+2.DIN
(P/N 2209)
- 2 Port RS-232/422/485
SeaLINK+2/232I.DIN
(P/N 2211)
- 2 Port Isolated RS-232
SeaLINK+2/485I.DIN
(P/N 2212)
- 2 Port Isolated RS-422/485
SeaLINK+2I.DIN
(P/N 2213)
- 2 Port Isolated RS-232/422/485

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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
Before You Get Started
What’s Included
The SeaLINK DIN Rail USB Serial Adapters ship with the following items. If any of these items is missing
or damaged, please contact Sealevel for replacement.
•SeaLINK USB Serial Adapter –(see part numbers on previous page)
•CA356 –USB Type A to SeaLATCH USB Type B Cable, 6’ in Length
•LB101 –DB9F Serial Loopback Adapter
Advisory Conventions
Warning
The highest level of importance used to stress a condition where damage could result to the
product, or the user could suffer serious injury.
Important
The middle level of importance used to highlight information that might not seem obvious or a
situation that could cause the product to fail.
Note
The lowest level of importance used to provide background information, additional tips, or other
non-critical facts that will not affect the use of the product.

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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing the SeaLINK USB Serial Adapters to real-world signals. All items can be purchased from our
website (http://www.sealevel.com) or by calling [phone]. For applicable accessories, pin out
diagrams are located on the website.
•CA127 –DB9 female to DB9 male serial extension cable. Extends a DB9 serial
connection by 72”.
•CA176 –DB9 female (RS-422) to DB25 male (RS-530) cable, 10” in length.
Converts Sealevel DB9 RS-422 pinout to the RS-530 DB25 pinout, useful where
RS-530 cabling already exists.
•CA177 –DB9 female to DB25 male modem cable, 72” in length. A standard
RS-232 modem cable providing a convenient connection to serial peripherals
with DB25 connectors. Connects to the host system via a DB9 connector.
•DB103 –DB9 female (RS-422) to DB9 female (Opto 22 Optomux) converter.
•RJ9S8 –DB9 female to RJ45 modular adapter. Helpful for converting DB9
serial port to RJ45 connector for using existing CAT5 infrastructure wiring.
•TB05 –A terminal block with a DB9 female connector breaking out to 9 screw
terminals. Simplifies field wiring of RS-422/485 networks with differing pin out
configurations.
•TB06 –A terminal block with dual DB9 female connectors breaking out to 18
screw terminals. Simplifies field wiring of RS-422/485 networks with differing
pin out configurations.
•SeaI/O-270U –Sealevel’s powered 7-port USB hub providing 1500 VAC of
optical isolation to the host system. Integrated SeaLATCH locking USB type A
& type B connectors (refer to the SeaLATCH USB section of this manual for
detailed information on SeaLATCH locking USB connectors and cables).
•HUB7i –Sealevel’s powered 7-port USB hub providing up to 5500 VAC of
optical isolation to the host system.

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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
Hardware Description
SeaLINK USB 1-Port Devices
Common Features
•Appears as virtual COM port to host machine
•Supports data rates to 921.6K bps
•Innovative SeaLATCH locking USB port provides secure cable connection
•Status LEDs display serial transmit and receive activity
•Popular DB9 male connector
•Easily snaps onto 35mm DIN rail
•USB bus powered eliminates external power supplies
SeaLINK+Multi.DIN (Item# 2109) Features
•Configurable for RS-232, RS-422, or RS-485 via dip switches
•Change configurations without opening the enclosure
•Automatic RS-485 enable/disable
•Non-isolated version
SeaLINK+232I.DIN (Item# 2111) Features
•Single RS-232 DB9 male serial port
•No dip switches to set; all changes can be made in software
•Easy way to connect RS-232 device to a USB port
•Optical isolation provides protection against surges and ground loops
SeaLINK+485I.DIN (Item# 2112) Features
•Configurable for RS-422 or RS-485 via dip switches
•Change configurations without opening the enclosure
•Automatic RS-485 enable/disable
•Optical isolation provides protection against surges and ground loops
SeaLINK+I.DIN (Item# 2113) Features
•Configurable for RS-232, RS-422, or RS-485 via dip switches
•Change configurations without opening the enclosure
•Automatic RS-485 enable/disable
•Optical isolation provides protection against surges and ground loops

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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
SeaLINK USB 2-Port Devices
Common Features
Appears as virtual COM ports to host machine
Supports data rates to 921.6K bps
Innovative SeaLATCH locking USB port provides secure cable connection
Status LEDs display serial transmit and receive activity
Popular DB9 male connectors
Easily snaps onto 35mm DIN rail
USB bus powered eliminates external power supplies
SeaLINK+2.DIN (Item# 2209) Features
Configurable for RS-232, RS-422, or RS-485 via dip switches
Change configurations without opening the enclosure
Automatic RS-485 enable/disable
Non-isolated version
SeaLINK+2/232I.DIN (Item# 2211) Features
Two RS-232 DB9 male serial ports
No dip switches to set; all changes can be made in software
Easy way to connect RS-232 devices to a USB port
Optical isolation provides protection against surges and ground loops
SeaLINK+2/485I.DIN (Item# 2212) Features
Configurable for RS-422 or RS-485 via dip switches
Change configurations without opening the enclosure
Automatic RS-485 enable/disable
Optical isolation provides protection against surges and ground loops
SeaLINK+2I.DIN (Item# 2213) Features
Configurable for RS-232, RS-422, or RS-485 via dip switches
Change configurations without opening the enclosure
Automatic RS-485 enable/disable
Optical isolation provides protection against surges and ground loops

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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
SeaLATCH™USB
SeaLINK USB serial adapters integrate the patent-pending SeaLATCH USB port, which is 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 connection to the device and prevents
accidental cable disconnection.

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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
SeaLATCH Locking USB Cables
SeaLATCH USB Connectors
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.
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.
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.
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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© Sealevel Systems, Inc. SeaLINK DIN Rail USB Serial Family Manual | SL9180 11/2021
Hardware Configuration
RS-232/422/485 Multi-Interface Products
Items# 2109, 2113, 2209, 2213
Dip switches on SeaLINK USB multi-interface serial adapters provide the ability to communicate with RS-
232, RS-422 or RS-485 devices. These switches are also used to set RS-485 enable modes and
termination options. Single port models have a single eight-position dip switch. Two port models have a
pair of eight-position dip switches allowing each port to be individually configured. All configuration
changes can be made without opening the enclosure.
DIP Switches
Switch
ON
OFF
8
2 Wire –
4 Wire –
7
2 Wire +
4 Wire +
6
RD 1K PU
–
5
RD 1K PD
–
4
120Ω Termination
–
3
Echo Off
Echo On
2
RS-485
RS-422
1
RS-422/485
RS-232
Switch
Function
8
RS-485 Option, OFF for RS-232, RS-422
ON: Connects TX–and RX–for two-wire operation
OFF: Separates TX–and RX–for four-wire operation
7
RS-485 Option, OFF for RS-232, RS-422
ON: Connects TX+ and RX+ for two-wire operation
OFF: Separates TX+ and RX+ for four-wire operation
6
RS-485 Option, OFF for RS-232, RS-422
ON: Adds a 1K Ω pull-up resistor to RX+
OFF: Leaves RX+ floating
5
RS-485 Option, OFF for RS-232, RS-422
ON: Adds a 1K Ω pull-down resistor to RX–
OFF: Leaves RX–floating
4
RS-422, RS-485 Option, OFF for RS-232
ON: Adds a 120Ω termination resistor between RX+ and RX–
OFF: No line termination
3
Two-Wire RS-485 Option, OFF for RS-232, RS-422, Four-Wire RS-485
ON: ECHO Off. The receiver is disabled when the transmitter is enabled. In a
two-wire setup the receiver will not echo back transmitted data
OFF: ECHO On. The receiver is always enabled. In a two-wire setup the
receiver will echo back all transmitted data
2
Mode Selection
ON: RS-485 mode. The transmitter lines TX+ and TX–are switched to high
impedance when the device is not actively transmitting data
OFF: RS-422 mode. The transmitter lines TX+ and TX–are always driven
1
Mode Selection
ON: RS-422, RS-485 mode
OFF: RS-232 mode