SeaLevel SeaDAC Lite Series User manual

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
SEADAC LITE
User Manual | SeaDAC Lite

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
Contents
BEFORE YOU GET STARTED ...............................................................................................................................3
OPTIONAL ITEMS ................................................................................................................................................ 4
INTRODUCTION ................................................................................................................................................... 7
HARDWARE DESCRIPTION ...............................................................................................................................10
CONNECTOR PIN ASSIGNMENTS ....................................................................................................................21
SEALATCH™ USB ...............................................................................................................................................25
SEAMAX APPLICATION SUITE .........................................................................................................................27
SEAMAX SOFTWARE INSTALLATION..............................................................................................................28
TECHNICAL SPECIFICATIONS..........................................................................................................................33
APPENDIX A - HANDLING INSTRUCTIONS ......................................................................................................34
APPENDIX B – HOW TO GET ASSISTANCE .....................................................................................................35
APPENDIX C – COMPLIANCE NOTICES ..........................................................................................................36
WARRANTY ........................................................................................................................................................38

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
Before You Get Started
What’s Included
All SeaDAC modules are shipped with the following items. If any of these items is missing or damaged,
please contact Sealevel for a replacement.
•SeaDAC Lite Digital Interface Adapter
•Item# CA356 – USB Type A to SeaLATCH Type B Cable, 6’ in Length
SeaDAC Lite iPorthole and OEM modules do not include an internal USB cable. Order the
appropriate internal cable for your system from Sealevel or use Molex connector p/n# 35507-0400
or equivalent.
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. SeaDAC Lite Manual | SL9181 10/2021
Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing SeaDAC Lite Modules. 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.
MOUNTING HARDWARE
STANDARD USB CABLES
DIN Rail Mounting Clips (Item# DR105)
If your device has flanges or mounting ears, you can use the DR105
to make virtually any device DIN rail compatible.
USB Type A to Sealevel 2mm Molex Connectors (Item# CA342)
The CA342 is 24” in length and is compatible with Sealevel
iPorthole™, SeaDAC Lite OEM, and other Sealevel USB devices
with a 1x4 2mm embedded connector. This allows you to connect
these USB devices to a standard USB port for testing, debugging
and application development.
USB 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.

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
EMBEDDED USB CABLES
SEALATCH™ LOCKING USB CABLES
SeaLATCH™ Locking USB Cables
SeaLATCH locking USB cables provide a secure metal-to-
metal connection between a USB device and the cable,
preventing the most common point of failure – accidental
cable disconnection. SeaLATCH cables are covered in a
dedicated section of this manual.
Internal USB Cable for Sealevel 2mm Molex Connectors (Item# CA382)
The CA382 is 14” in length and is compatible with Sealevel
iPorthole™ and SeaDAC Lite OEM products. Both ends have a
1x4 2mm Molex connector for internal connections to Sealevel
embedded USB products.
USB Cable (Item#
CA179)
Internal USB Cable for 1x4 2mm Box Header Connectors (Item# CA383)
The CA383 is 14” in length and is compatible with Sealevel
iPorthole™ and SeaDAC Lite OEM products. Perfect for adding
Sealevel I/O modules to small embedded systems.
USB Type A to USB Type B Device Cable (Item# CA179)
The CA179 is a standard six-foot device cable that connects
USB peripherals with a Type B connector to the Type A
connector on a host PC or hub.

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
USB HUBS
High Speed 4-Port USB 2.0 Hub (Item# HUB4PH)
The HUB4PH is a powered 4-port USB 2.0 hub with SeaLATCH
locking USB connectors. The hub is perfect for expanding
industrial computers with locking USB ports.
USB Cab
le
(Item# CA179)
High Speed 7-Port USB 2.0 Hub (Item# HUB7P)
The HUB7P is a powered 7-port USB 2.0 hub that is
perfect for adding high-speed USB ports to industrial
computers. A high retention Type B connector prevents
accidental cable disconnection.
Optically Isolated 7-Port USB Hub (Item# HUB7i)
The HUB7i is an optically isolated USB hub that connects
up to seven USB peripherals and protects the host
computer from voltages up to 5500 VAC. A high
retention Type B connector prevents accidental cable
disconnection.
iPortholes High Speed 4-Port USB 2.0 Hub (Item# HUB4PH-KT)
The HUB4PH-KT is an internally powered 4-port USB 2.0
hub with SeaLATCH locking USB connectors. Simply
design the 3.2” x 3.1” Porthole mounting footprint into
your enclosure and easily add four downstream locking
USB ports.
Embedded High Speed 4-Port USB 2.0 Hub (Item# HUB4PH-OEM)
The HUB4PH-OEM is an internally powered 4-port USB
2.0 hub. It includes a cable that sources +5V power from
a standard hard drive connector and is perfect for
adding up to four iPorthole modules to your embedded
application.
USB Cab
le (Item# CA179)

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
Introduction
SeaDAC Lite™ USB digital I/O modules provide a low I/O count solution in a small, rugged enclosure.
Models are available with optically isolated inputs, Reed or Form C relay and TTL outputs. SeaDAC Lite
modules are powered by the USB port, eliminating external power supplies.
SeaDAC Lite modules integrate a SeaLATCH™ USB port that provides a secure metal-to-metal connection
and prevents accidental cable disconnection. SeaLATCH connectors are fully compatible with standard
USB cables.
For easy software integration, application programs or 3rd party software can use Sealevel’s SeaMAX
library that includes a variety of helpful diagnostic utilities and sample programs. SeaDAC Lite modules are
supported under Windows and Linux operating systems.
For embedded system solutions, SeaDAC Lite modules are available in iPorthole™ versions with the
“Intelligent Porthole” family of USB digital I/O products. Simply design the 3.2” x 3.1” Porthole mounting
footprint into your enclosure to mix and match iPorthole USB I/O modules for maximum configurability.
The Porthole footprint offers a standard method for interfacing real-world I/O connections.
SeaDAC Lite modules are USB 2.0 compatible, USB 1.1 compliant, and are powered by the USB port,
eliminating external power supplies. OEM versions without enclosures or Porthole mounting plates are also
available.

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
This manual covers the installation & operation of these SeaDAC Lite modules:
SeaDAC Lite DIO-8 4 Isolated Inputs / 4 Reed Relay Outputs
SeaDAC Lite Module P/N 8111
iPorthole Module P/N 8111-KT
OEM Module P/N 8111-OEM
SeaDAC Lite PLC-8 4 Isolated Inputs / 4 Form C Relay Outputs
SeaDAC Lite Module P/N 8112
iPorthole Module P/N 8112-KT
OEM Module P/N 8112-OEM
SeaDAC Lite ISO-4 4 Optically Isolated Inputs
SeaDAC Lite Module P/N 8113
iPorthole Module P/N 8113-KT
OEM Module P/N 8113-OEM
SeaDAC Lite REL-4 4 Reed Relay Outputs
SeaDAC Lite Module P/N 8114
iPorthole Module P/N 8114-KT
OEM Module P/N 8114-OEM
SeaDAC Lite REL-4C 4 Form C Relay Outputs
SeaDAC Lite Module P/N 8115
iPorthole Module P/N 8115-KT
OEM Module P/N 8115-OEM
SeaDAC Lite PIO-32 32 Channel TTL
SeaDAC Lite Module P/N 8126
iPorthole Module P/N 8126-KT
OEM Module P/N 8126-OEM
Please call for pricing on extended temperature versions and for other available modifications.

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
Overview
Sealevel SeaDAC Lite modules are available in various I/O configurations, each designed for maximum
flexibility and easy field wiring. SeaDAC Lite modules offer system designers a compact, low-cost
alternative for interfacing any USB equipped computer with real world signals. SeaDAC Lite modules are
designed to work with third party applications via the Sealevel SeaMAX API. For maximum reliability, all
SeaDAC Lite modules include Sealevel’s innovative SeaLATCH locking USB connector design that prevents
accidental cable disconnection.
Industry Segments
SeaDAC modules are perfect for a wide variety of applications and environments including:
•Process Control
•Data Acquisition
•Broadcast Automation
•Security
•Facility Management
Features
•Models Offering Choice of:
•Optically Isolated Inputs
•Reed Relay Outputs
•Form C Relay Outputs
•TTL Interface
•SeaLATCH Locking USB Connector Prevents Cable Disconnection
•Powered by USB Connection
•Status Indicator LEDs for I/O Activity and USB Connection
•Field Removable Terminal Block Connectors
•Optional Spring-Clamp Terminal Blocks Available
•Industry standard 50-pin relay rack connector
•Wide Operating Temperature (0°C to +70°C)
•Extended Temperature Available (-40°C to +85°C)
•Housed in Rugged, Attractive Plastic Enclosure
•Compact Size with Versatile Mounting Capabilities
•Available in iPorthole and OEM versions

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
Hardware Description
SeaDAC Lite Configurations & Specifications
8111 – 4 Optically Isolated Inputs/4 Reed Relay Outputs
SeaDAC Lite 8111 modules provide 4 optically isolated inputs and 4 dry-contact Reed relay outputs. Inputs
can range from 5-30VDC and provide 2500VAC RMS / 3500VDC isolation to ground, while the Reed relays
provide long life switch closures that are well suited for low current applications. Each Reed relay has a
discrete common and each pair of inputs share a common. Status LEDs display I/O activity and field wiring
is simplified via removable 3.5mm terminal blocks compatible with 16-30 AWG wiring.
8111-KT iPorthole
8111-OEM
Inputs
Type
4 non-polarized optically isolated inputs
Voltage Range
5-30VDC
Isolation
2500VAC RMS / 3500VDC
Input Resistance
6.2K Ohms in series
Response Time
4μs
Outputs
Type
4 SPST Form A Reed relays
Power
10VA max.
Contact Voltage
60VDC max.
Contact Current
500mA max.
Operate Time
0.5ms max.
Bounce Time
0.5ms max.
Release Time
0.2ms max.

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
8112 – 4 Optically Isolated Inputs/4 Form C Outputs
The SeaDAC Lite 8112 provides 4 optically isolated inputs and 4 SPDT Form C relay outputs. Inputs can
range from 5-30VDC and provide 2500VAC RMS / 3500VDC isolation to ground, while the Form C relays
switch up to 60VDC @ 5A or 250VAC @ 6A. Each Form C relay has a discrete common and includes
normally-open and normally-closed contact connections. Each pair of inputs shares a common. Status
LEDs display I/O activity and field wiring is simplified via 3.5mm field removable terminal blocks compatible
with 16-30 AWG wiring.
Inputs
Type
4 non-polarized optically isolated inputs
Voltage Range
5-30VDC
Isolation
2500VAC RMS / 3500VDC
Input Resistance
6.2K Ohms in series
Response Time
4μs
Outputs
Type
4 SPDT Form C relays
Power
DC 240W / AC 600 VA
Contact Voltage
60VDC / 250VAC max.
(5VDC min.)
Contact Current (DC)
< 30 VDC @ 5A max.
≥ 30 VDC @ 2000mA max.
(100mA min.)
Contact Current (AC)
6A max.
Operate Time
10ms max.
Release Time
5ms max.
8112-KT iPorthole
8112-OEM

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
8113 – 4 Optically Isolated Inputs
SeaDAC Lite 8113 modules provide 4 optically isolated inputs with 2500VAC RMS / 3500VDC external
isolation. Ideal for low voltage monitoring applications, inputs can range from 5-30VDC. Status LEDs
display I/O activity and connection to real world signals is made via 3.5mm field removable screw terminal
connectors compatible with 16-30 AWG wiring.
Inputs
Type 4 non-polarized optically isolated inputs
Voltage Range 5-30VDC
Isolation 2500VAC RMS / 3500VDC
Input Resistance 6.2K Ohms in series
Response Time 4μs
8113-KT iPorthole
8113-OEM

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
8114 – 4 Reed Relay Outputs
The SeaDAC Lite 8114 provides 4 SPST Form A dry-contact Reed relays. Reed relays offer long life
performance, fast response time, and are well suited to low current devices. Each relay output has a
discrete common. Status LEDs display I/O activity and field wiring is simplified via field removable 3.5mm
screw terminal blocks compatible with 16-30 AWG wiring.
Outputs
Type 4 SPST Form A Reed relays
Power DC 30W / AC 10VA Max.
Contact Voltage 60VDC max.
Contact Current 500mA max.
Operate Time 0.5ms max.
Bounce Time 0.5ms max.
Release Time 0.2ms max.
8114-KT iPorthole
8114-OEM

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
8115 – 4 Form C Relay Outputs
Control and monitor a variety of devices with the SeaDAC Lite 8115. The module’s 4 channels of highly-
reliable SPDT Form C relay outputs are rated for up to 60VDC @ 5A or 250VAC @ 6A. Each Form C relay
has a discrete common and includes normally-open and normally-closed contact connections. Status LEDs
display I/O activity and field wiring is simplified via 3.5mm field removable terminal blocks compatible with
16-30 AWG wiring.
Outputs
Type 4 SPDT Form C relays
Power DC 210W / AC 1200 VA Max.
Contact Voltage 60VDC / 250VAC max.
(5VDC min.)
Contact Current (DC) <30 VDC @ 5A max.
>30 VDC @ 700mA max.
(100mA min.)
Contact Current (AC) 6A max.
Operate Time 10ms max.
Release Time 5ms max.
8115-KT iPorthole
8115-OEM

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
8126 – 32 Channel TTL
The SeaDAC Lite 8126 provides 32 channels of buffered drive digital I/O. The module addresses the 32
channels of I/O as four eight-bit ports, each programmable as input or output. Use a standard 50-pin IDC
ribbon cable to connect an industry standard relay rack for PC based control and automation of equipment
including sensors, switches, security control systems, and other industrial automation systems. A status
LED lights when the 8126 is successfully communicating with a USB port.
Power Requirements
Max Output Power +5VDC @ 350mA
Inputs
Logic High Min 2VDC
Logic Low Max 0.8VDC
Outputs *
Logic Low Max 0.5VDC @ 64mA
Logic High Min 2VDC @ 32mA
8126-KT iPorthole
8126-OEM

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
8126 – Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for
interfacing the 8126 to real-world signals. All items can be purchased from our website
(http://www.sealevel.com) or by calling [phone].
TTL applications
Terminal Block Kit (Item# KT107)
Kit includes the TB07 screw terminal block and CA167 ribbon
cable for connecting the 8126’s 50-pin header connector to
your I/O. 6” Snap track and DIN rail clips are included for DIN
rail mounting.
USB (Item
#
CA179)
Terminal Block – 50-Pin Header to 40 Screw Terminals (Item# TB07)
The TB07 allows you to break out digital TTL signals, +5 volts,
and ground to screw terminals for easy field connection of
switches, discrete solid state relays, sensors, etc. Two four-
position screw terminals interface +5V and Ground.
IDC 50 to IDC 50 Pin 40" Ribbon Cable (Item# CA167)
Interfaces the 8126’s 50-pin header connector
Simulation/Debug Module (Item# TA01)
Module allows monitoring status of output pins and
controlling state of input pins. An LED corresponding to each
port bit illuminates to indicate state. Eight position DIP-
switches are used to generate input status changes.

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
High-Current, High-Voltage Applications
Discrete 8-Position Relay Rack (Item# PB8HS)
The PB8HS relay rack can be used with up to eight discrete I/O
modules, including input modules, output relays, override relays,
watchdog timers, and mechanical relays.
Discrete 16-Position Relay Rack (Item# PB16HS)
The PB16HS relay rack can be used with up to sixteen discrete I/O
modules, including input modules, output relays, override relays,
watchdog timers, and mechanical relays.
Discrete 24-Position Relay Rack (Item# PB24HS)
The A24H relay rack can be used with up to twenty-four discrete
I/O modules, including input modules, output relays, override relays,
watchdog timers, and mechanical relays.
IDC 50 to IDC 50 Pin Ribbon Cable (Item# CA167)
40” cable connects the 8126 to solid-state relay racks equipped
with a 50-pin header interface.
IDC 50 to IDC 50 Pin Ribbon Cable (Item# CA135)
40” cable connects the 8126 to solid-state relay racks equipped
with a 50-pin edge connector.
Solid-State Relay Racks: Quad six position relay rack (Item# PB24HQ)
Relay rack can accept up to six QSSRs for a total of 24 channels.
Features a 50-pin header connector for easy interface via 50-
conductor ribbon cables.

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
For high-current, high-voltage applications, continued
Solid-State Relay Racks: Quad four position relay rack (Item# PB16HQ)
Relay rack can accept up to four QSSRs for a total of 16 channels.
Features a 50-pin header connector for easy interface via 50-
conductor ribbon cables.
Quad Solid-State Relay Modules: AC Input (Item# IA5Q)
Provides 4 channels of discrete I/O interface to monitor AC inputs
up to 140V @ 10mA.
Quad Solid-State Relay Modules: DC Input (Item# IB5Q)
Provides 4 channels of discrete I/O interface to monitor DC inputs
from 3.3V to 32V.
Quad Solid-State Relay Modules: DC Input (Item# OA5Q)
AC Output (Item# OA5Q) –Provides 4 channels of discrete I/O
interface to control AC outputs up to 140V @ 3A.
Quad Solid-State Relay Modules: DC Output (Item# OB5Q)
Provides 4 channels of discrete I/O interface to control DC outputs
up to 60V @ 3A.

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
SeaDAC Lite 8126 connected to Terminal Block (TB07)
SeaDAC Lite 8126 connected to Discrete Relay Rack (PB1 GHS)
SeaDAC Lite 8126 connected to Solid State Relay Rack (PB24HQ)

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© Sealevel Systems, Inc. SeaDAC Lite Manual | SL9181 10/2021
SeaDAC Lite Power Requirements
Sealevel SeaDAC Lite modules are powered by the USB host interface and require 5VDC @ 500mA to be
available on the USB port. Most computers and powered USB hubs are capable of meeting this requirement,
while passive USB hubs and some laptops running on batteries may not. Check the product manual that
shipped with your system or hub if you are uncertain. Sealevel technical support may also be able to help.
The maximum power requirements for each SeaDAC Lite device are shown below.
Item#
Description
mA
8111
4 Isolated Inputs / 4 Reed Relay Outputs
300
8112
4 Isolated Inputs / 4 Form C Relay Outputs
500
8113
4 Optically Isolated Inputs
100
8114
4 Reed Relay Outputs
200
8115
4 Form C Relay Outputs
400
8126
32 TTL Channels
500