SeaLevel SeaI/O-580E User manual

1
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
SeaI/O
User Manual | SEAI/O

2
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
Contents
CONTENTS........................................................................................................................................................................................................................................2
BEFORE YOU GET STARTED..........................................................................................................................................................................................................4
Advisory Conventions..................................................................................................................................................... 4
Useful Accessories ......................................................................................................................................................... 4
INTRODUCTION...............................................................................................................................................................................................................................6
Industry Segments ......................................................................................................................................................... 6
Features......................................................................................................................................................................... 7
SeaI/O Products in This Manual..................................................................................................................................... 8
Maximizing Performance............................................................................................................................................. 10
SEAI/O HARDWARE DESCRIPTION...........................................................................................................................................................................................11
SeaI/O Base and Expansion Modules .......................................................................................................................... 11
SeaI/O Module Common Features............................................................................................................................... 12
SeaI/O Configurations & Specifications ....................................................................................................................... 13
POWER OPTIONS.........................................................................................................................................................................................................................38
Base Module Power Connection.................................................................................................................................. 38
SeaI/O Expansion Power Connection........................................................................................................................... 38
SeaI/O Max Power Requirements................................................................................................................................ 38
TTL Power Requirements ............................................................................................................................................. 39
Sample Power Calculation ........................................................................................................................................... 39
SEAMAX APPLICATION SUITE...................................................................................................................................................................................................40
SeaMAX Overview ....................................................................................................................................................... 40
Communicating Via Modbus ....................................................................................................................................... 40
SeaMAX Software Installation..................................................................................................................................... 41
Instructions for Downloaded Software Installation..................................................................................................... 41
Upgrading to the current SeaI/O Software (SeaMAX)................................................................................................. 41
MaxSSD Configuration & Diagnostics Utility ............................................................................................................... 42
Troubleshooting - SeaMAX .......................................................................................................................................... 50
MOD+ CONNECT MOBILE APP...................................................................................................................................................................................................51
HARDWARE CONFIGURATION..................................................................................................................................................................................................52
Setting Device Address (Slave ID) ................................................................................................................................ 52
Setting Termination & Pull-Up/Pull-Down Resistors.................................................................................................... 53
Configuring the “Base” SeaI/O Module ....................................................................................................................... 53
Configuring N-Series Expansion Modules .................................................................................................................... 55
Configuring a Wireless (W-Series) Module or Wireless Gateway................................................................................ 55
Configuring an Ethernet (E-Series) Module ................................................................................................................. 65
Advanced Module Features ......................................................................................................................................... 68
SeaI/O-463 Ribbon Cable Installation.......................................................................................................................... 72
SeaI/O-470 Jumper and Dipswitch Settings................................................................................................................. 74
SeaI/O-570 Dipswitch Settings .................................................................................................................................... 77

3
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
WIRING OPTIONS .........................................................................................................................................................................................................................79
SeaI/O Pass-Through Connector.................................................................................................................................. 79
I/O Wiring – SeaI/O-462 and 463 Modules ................................................................................................................. 81
I/O Wiring – SeaI/O-470 Modules ............................................................................................................................... 84
I/O Wiring – SeaI/O-520 Modules ............................................................................................................................... 87
I/O Wiring – SeaI/O-530 and 540 Modules ................................................................................................................. 88
I/O Wiring – SeaI/O-570 Modules ............................................................................................................................... 89
I/O Wiring – SeaI/O-580 Modules ............................................................................................................................... 92
Connector Pin Outs ...................................................................................................................................................... 93
MOUNTING OPTIONS..................................................................................................................................................................................................................94
SEALATCH™ USB ........................................................................................................................................................................................................................95
SeaLATCH Locking USB Cables..................................................................................................................................... 96
ACCESSORIES ...............................................................................................................................................................................................................................97
Power Supplies............................................................................................................................................................. 97
Mounting Options........................................................................................................................................................ 99
Cabling Options ......................................................................................................................................................... 101
APPENDIX A – HANDLING INSTRUCTIONS..........................................................................................................................................................................104
SAFETY INSTRUCTIONS .............................................................................................................................................. 104
APPENDIX B – HOW TO GET ASSISTANCE ..........................................................................................................................................................................105
APPENDIX C – TROUBLESHOOTING......................................................................................................................................................................................106
APPENDIX D – COMPLIANCE NOTICES.................................................................................................................................................................................108
WARRANTY.................................................................................................................................................................................................................................109

4
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
Before You Get Started
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.
Do not connect the I/O module to the host until SeaMAX software is installed.
Useful Accessories
All items can be purchased from our website (www.sealevel.com) or by calling our sales team at +1
[phone].
E Series (Ethernet)
CAT5 Patch Cable (Part# CA246)
Standard 7' CAT5 UTP Patch Cable (RJ45).
CAT5 Crossover Cable (Part# CA251)
Standard 7' CAT5 UTP Crossover Cable (RJ45).

5
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
U Series (USB)
USB Type A to SeaLATCH USB Type B Device Cable (Part#
CA356)
The CA356 is a USB device cable with a SeaLATCH USB type B
connector and standard USB type A connector. The metal
thumbscrew on the type B connector provides a secure metal-
to-metal connection to devices with SeaLATCH USB ports. This
72 inch cable is included with all Sealevel USB products with an
integrated SeaLATCH USB type B port. SeaLATCH USB cables
are fully interchangeable with standard USB cables.
M Series (RS-485)
No cable is included. Use twisted-pair wiring connected to RS-
485 signals via screw terminals on left side of SeaI/O module.
S Series (RS-232)
SeaI/O DB9 Female to RJ45 Adapter (RS-232 Pinout) and
CAT5 7' Patch Cable (Blue) (Part# KT119)
The KT119 includes a modular adapter with a DB9 female
connector that plugs directly into any standard DB9 RS-232
serial port and converts it to an RJ45 connection. Designed to
easily connect SeaI/O RS-232 devices to any standard serial
port via standard CAT5 patch cables. The KT119 ships with one
DB9 female to RJ45 adapter, Item # DB109, and a 7' CAT5 patch
cable, Item # CA246.
N Series (Expansion)
Expansion and Strap Kit - for SeaI/O
(Part# KT122)
Included with all N-
series expansion modules, the KT122
expansion and strap kit has four metal straps, four #4-40
screws, and a CA239 RS-485 interconnect cable. The metal
straps allow you to connect a Relio R1100 system and multiple
SeaI/O modules together in a stack. The CA239 interconnect
cable can be used to connect two SeaI/O modules together via
the RJ45 connectors. This provides an easy method to cascade
RS-485 signals, and power and ground from one module to the
next. When used in combination with the KT123 flush mount
bracket kit, the KT122 expansion and strap kit can be used to
mount a stack of SeaI/O modules, including a Relio R1100
system, in a variety of mounting positions and locations.
All Models
Each SeaI/O unit is shipped with 4 adhesive rubber feet that can
be attached to the bottom of the enclosure to enhance stability
in table mount applications.

6
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
Introduction
Sealevel SeaI/O™ modules offer powerful data acquisition solutions that are perfect for a wide range of
applications and environments with easy interfacing to computers, controllers, and PLCs. SeaI/O modules are
available in various digital, analog, and serial I/O configurations. Each SeaI/O model is designed for maximum
flexibility and easy field wiring.
Ordering options allow connection to the host device via Wi-Fi, Ethernet, USB, RS-485, or RS-232. Up to 246
expansion modules can be daisy chained together via RS-485 using convenient pass-through connectors.
For easy software integration, application programs or third party software can use the Sealevel SeaMAXTM
library or industry standard Modbus TCP (Ethernet & Wireless) and Modbus RTU (RS-232, RS-485, and USB)
protocols.
Industry Segments
SeaI/O modules are perfect for a wide variety of applications and environments including:
•Process Control
•Data Acquisition
•Broadcast Automation
•Security
•Facility Management

7
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
Features
oChoice of Connectivity:
•Wi-Fi
•Ethernet
•USB
•RS-485
•RS-232
oSupports Industry Standard Modbus TCP & RTU Protocols
oModels Offering Choice of:
•Optically Isolated Inputs
•Reed Relay Outputs
•Form C Relay Outputs
•Open-collector Outputs
•TTL Interfaces
•Analog A/D & D/A
oStatus Indicator LEDs for Communication, Fault, and Status
oField Removable Terminal Block Connectors (most models)
oDaisy Chain up to 247 Modules
o9-30VDC Power Input
oPower Input via Terminal Block or DC Jack
oRugged Metal Enclosure
oDin Rail or Table Mount
oExtended Temperature Range Available

8
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
SeaI/O Products in This Manual
Wireless 802.11b/g/n
SeaI/O-410W – 16 Optically Isolated Inputs/16 Reed Relay Outputs
SeaI/O-420W – 16 Optically Isolated Inputs/8 Form C Outputs
SeaI/O-430W – 32 Optically Isolated Inputs
SeaI/O-440W – 32 Reed Relay Outputs
SeaI/O-450W – 16 Form C Relay Outputs
SeaI/O-462W – 96 Bit TTL I/O (DB-78)
SeaI/O-463W – 96 Bit TTL I/O (50-Pin IDC)
SeaI/O-470W – 8 Inputs/8 Outputs/2 D/A & 16 A/D
SeaI/O-520W – 8 Optically Isolated Inputs/8 High-Current Form C Outputs
SeaI/O-530W – 16 Optically Isolated Inputs/16 High-Current Open Collector Outputs
SeaI/O-540W – 32 High-Current Open Collector Outputs
SeaI/O-570W – 8 Inputs/8 Form C Outputs/8 A/D
Ethernet 10/100 BaseT
SeaI/O-410E – 16 Optically Isolated Inputs/16 Reed Relay Outputs
SeaI/O-420E – 16 Optically Isolated Inputs/8 Form C Outputs
SeaI/O-430E – 32 Optically Isolated Inputs
SeaI/O-440E – 32 Reed Relay Outputs
SeaI/O-450E – 16 Form C Relay Outputs
SeaI/O-462E – 96 Bit TTL I/O (DB-78)
SeaI/O-463E – 96 Bit TTL I/O (50-Pin IDC)
SeaI/O-470E – 8 Inputs/8 Outputs/2 D/A & 16 A/D
SeaI/O-520E – 8 Optically Isolated Inputs/8 High-Current Form C Outputs
SeaI/O-530E – 16 Optically Isolated Inputs/16 High-Current Open Collector Outputs
SeaI/O-540E – 32 High-Current Open Collector Outputs
SeaI/O-570E – 8 Inputs/8 Form C Outputs/8 A/D
SeaI/O-580E/580PoE – 32 Optically Isolated Dry Contact Inputs
USB
SeaI/O-410U – 16 Optically Isolated Inputs/16 Reed Relay Outputs
SeaI/O-420U – 16 Optically Isolated Inputs/8 Form C Outputs
SeaI/O-430U – 32 Optically Isolated Inputs
SeaI/O-440U – 32 Reed Relay Outputs
SeaI/O-450U – 16 Form C Relay Outputs
SeaI/O-462U – 96 Bit TTL I/O (DB-78)
SeaI/O-463U – 96 Bit TTL I/O (50-Pin IDC)
SeaI/O-470U – 8 Inputs/8 Outputs/2 D/A & 16 A/D
SeaI/O-520U – 8 Optically Isolated Inputs/8 High-Current Form C Outputs
SeaI/O-530U – 16 Optically Isolated Inputs/16 High-Current Open Collector Outputs
SeaI/O-540U – 32 High-Current Open Collector Outputs
SeaI/O-570U – 8 Inputs/8 Form C Outputs/8 A/D

9
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
SeaI/O Products in This Manual, Continued
RS-485
SeaI/O-410M – 16 Optically Isolated Inputs/16 Reed Relay Outputs
SeaI/O-420M – 16 Optically Isolated Inputs/8 Form C Outputs
SeaI/O-430M – 32 Optically Isolated Inputs
SeaI/O-440M – 32 Reed Relay Outputs
SeaI/O-450M – 16 Form C Relay Outputs
SeaI/O-462M – 96 Bit TTL I/O (DB-78)
SeaI/O-463M – 96 Bit TTL I/O (50-Pin IDC)
SeaI/O-470M – 8 Inputs/8 Outputs/2 D/A & 16 A/D
SeaI/O-520M – 8 Optically Isolated Inputs/8 High-Current Form C Outputs
SeaI/O-530M – 16 Optically Isolated Inputs/16 High-Current Open Collector Outputs
SeaI/O-540M – 32 High-Current Open Collector Outputs
SeaI/O-570M – 8 Inputs/8 Form C Outputs/8 A/D
RS-232
SeaI/O-410S – 16 Optically Isolated Inputs/16 Reed Relay Outputs
SeaI/O-420S – 16 Optically Isolated Inputs/8 Form C Outputs
SeaI/O-430S – 32 Optically Isolated Inputs
SeaI/O-440S – 32 Reed Relay Outputs
SeaI/O-450S – 16 Form C Relay Outputs
SeaI/O-462S – 96 Bit TTL I/O (DB-78)
SeaI/O-463S – 96 Bit TTL I/O (50-Pin IDC)
SeaI/O-470S – 8 Inputs/8 Outputs/2 D/A & 16 A/D
SeaI/O-520S – 8 Optically Isolated Inputs/8 High-Current Form C Outputs
SeaI/O-530S – 16 Optically Isolated Inputs/16 High-Current Open Collector Outputs
SeaI/O-540S – 32 High-Current Open Collector Outputs
SeaI/O-570S – 8 Inputs/8 Form C Outputs/8 A/D
Expansion Units (Connect to Base Unit via RS-485)
SeaI/O-410N – 16 Optically Isolated Inputs/16 Reed Relay Outputs
SeaI/O-420N – 16 Optically Isolated Inputs/8 Form C Outputs
SeaI/O-430N – 32 Optically Isolated Inputs
SeaI/O-440N – 32 Reed Relay Outputs
SeaI/O-450N – 16 Form C Relay Outputs
SeaI/O-462N – 96 Bit TTL I/O (DB-78)
SeaI/O-463N – 96 Bit TTL I/O (50-Pin IDC)
SeaI/O-470N – 8 Inputs/8 Outputs/2 D/A & 16 A/D
SeaI/O-520N – 8 Optically Isolated Inputs/8 High-Current Form C Outputs
SeaI/O-530N – 16 Optically Isolated Inputs/16 High-Current Open Collector Outputs
SeaI/O-540N – 32 High-Current Open Collector Outputs
SeaI/O-570N – 8 Inputs/8 Form C Outputs/8 A/D

10
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
Maximizing Performance
All SeaI/O modules have a default baud rate of 9600. If lower latencies are required, the baud rate can be
changed via the Sealevel utility, MaxSSD, included in your SeaMAX installation.
All items can be purchased from our website (www.sealevel.com) or by calling our sales team at
[phone].
To change the baud rate, connect to a SeaI/O module using MaxSSD. If you need to change the baud rate of
multiple devices, check the “Broadcast to Multiple Modules” box. Select the desired baud rate from the baud
rate dropdown and click “Set Settings.” If you are connected to the modules via a COM port, you will need to
reopen the COM port with the new baud rate.
Example timing values
SeaI/O-470
Baud rate: 9600
Reading 8 Digital Inputs Average Time: 32.00ms
Writing 8 Digital Outputs -- OFF state Average Time: 32.00ms
Writing 8 Digital Outputs -- ON state Average Time: 32.00ms
Reading 16 Analog-to-Digital Converters Average Time: 48.01ms
Writing to 2 Digital-to-Analog Outputs Average Time: 32.00ms
SeaI/O-470
Baud rate: 115200
Reading 8 Digital Inputs Average Time: 15.57ms
Writing 8 Digital Outputs -- OFF state Average Time: 15.92ms
Writing 8 Digital Outputs -- ON state Average Time: 16.21ms
Reading 16 Analog-to-Digital Converters Average Time: 16.25ms
Writing to 2 Digital-to-Analog Outputs Average Time: 16.26ms
Higher baud rates are more susceptible to electrical line noise. If you find that you are receiving
erroneous results, try lowering the baud rate or shortening your cables.

11
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
SeaI/O Hardware Description
SeaI/O Base and Expansion Modules
Base Modules connect to the host via one of the following interfaces:
•Wireless Gateway – Wireless Modbus TCP
•W-Series – Wireless Modbus TCP
•E-Series - Ethernet Modbus TCP
•U-Series - USB Modbus RTU
•M-Series - RS-485 Modbus RTU
•S-Series - RS-232 Modbus RTU
After the base unit is installed, up to 246 additional SeaI/O N-Series Expansion Units can be added to create an
I/O network. These expansion modules interface via RS-485 and can be located local to the Base SeaI/O device
or remotely located up to 4000 feet away. Local installations should use the 5” CAT5 RS-485 pass-through cable
(Part# CA239) shipped with each N-series module to connect. Remote expansion modules should use RS-485
twisted pair wiring from the base unit connected via the removable screw terminal connector.
For local installations, power to the expansion modules is supplied from the Base unit via the pass-through
connectors. For remote devices, separate power is required at each expansion unit. Refer to the Power Options
section of this manual for more information on SeaI/O power requirements and power supply sizing.

12
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
SeaI/O Module Common Features
All SeaI/O modules include the same connectors and configuration options on the side of the unit:
RS-485 networks should have termination enabled on each end of the network. Pull-up and pull-
down resistors should also be enabled on the last device on the network. The 9-30VDC input barrel
connector is center positive
Status LEDs are also included on the front of all SeaI/O modules to indicate the following information:
•Communication (Yellow) – Blinks when data is transmitted
•Fault (Red) – Lights when there is a problem with the device
•Status (Green) – See Device Address Configuration section of this manual
Blinks when the rotary “ADDR” switch is set to “0” and the default Slave ID is set to 247
Lights steady when module is properly configured from the factory defaults

13
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
SeaI/O Configurations & Specifications
SeaI/O Wireless Specifications
All wireless Wi-Fi SeaI/O modules share a common networking engine. This subsystem is comprised of a
wireless MCU module that integrates an ARM Cortex-M4 MCU and includes an 802.11 b/g/n radio, baseband,
and MAC with a powerful crypto engine for fast, secure Internet connections with 256-bit encryption. It supports
Infrastructure and access point modes and supports WPA2 personal security. The engine includes embedded
TCP/IP and TLS/SSL stacks, HTTP server, and multiple Internet protocols.
Standards
2.4 GHz IEEE 802.11b/g/n WLAN
Channels 1–11
Frequency Range 2.412 – 2.484 GHz
TX Power 17 dBm at 1 DSSS
17.25 dBm at 11 CCK
13.5 dBm at 54 OFDM
RX Sensitivity –94.7 dBm at 1 DSSS
–87 dBm at 11 CCK
–73 dBm at 54 OFDM
Application Throughput UDP: 16 Mbps
TCP: 13 Mbps
Range 300’ line-of-sight (with no obstructions or interference)
WLAN
2.4 GHz IEEE 802.11b/g/n WLAN
Supported Protocols: Modbus/TCP, TCP/IP, UDP, DHCP,
and HTTP
TCP/IP Stack
Infrastructure and Access Point Modes
Powerful Crypto Engine for Fast, Secured WLAN
Connections with 256-Bit Encryption
WEP, WPA1 and WPA2 Personal and Enterprise Security
Antenna Considerations
The wireless device ships with an approved Wi-Fi antenna. Using a different antenna is not supported and it
may invalidate regulatory certification.

14
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
410 Series – 16 Optically Isolated Inputs/16 Reed Relay Outputs
SeaI/O-410 modules provide 16 optically isolated inputs and 16 Reed relay outputs. Inputs can range from 5-
30VDC, while the Reed relays provide long life switch closures that are well suited for low current applications.
Inputs and outputs are grouped into four-bit segments. Each group shares a common for easy wiring via
removable 3.5mm terminal blocks.
Inputs
Type 16 non-polarized optically isolated inputs
Voltage Range 5-30VDC
Isolation 1250VAC RMS / 1800VDC
Input Resistance 6.2K Ohms in series
Response Time 4 microseconds
Outputs
Type 16 SPST Form A Reed relays
Power 10VA max.
Contact Voltage 60VDC max. / 50VAC max.
Contact Current 500mA max.
Operate Time 0.5ms max.
Bounce Time 0.5ms max.
Release Time 0.2ms max.

15
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
420 Series – 16 Optically Isolated Inputs/8 Form C Outputs
The SeaI/O-420 provides 16 optically isolated inputs and 8 SPDT Form C relay outputs. Inputs can range from
5-30VDC and provide 2500VAC RMS / 3500VDC isolation to ground. Each output offers normally open and
normally closed contact connections via 3.5mm field removable terminal blocks.
USE EXTREME CAUTION!
High voltages will be present on the SeaI/O family of products when high voltage is connected. Never
handle the printed circuit board when high voltage is connected. Never handle the printed circuit board
when high voltage signals are connected to the board.
Inputs
Type 16 non-polarized optically isolated inputs
Voltage Range 5-30VDC
Isolation 1250VAC RMS / 1800VDC
Input Resistance 6.2K Ohms in series
Response Time 4 microseconds
Outputs
Type 8 SPDT Form C relays
Power DC 30W / AC 60 VA
Contact Voltage 60VDC max. / 50VAC max.
Contact Current 2A max.
Operate Time 2ms max.
Bounce Time 7ms max.
Release Time 1ms max.

16
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
430 Series – 32 Optically Isolated Inputs
SeaI/O-430 modules provide 32 optically isolated inputs with 2500VAC RMS / 3500VDC external isolation and
high channel-to-channel isolation. Ideal for low voltage monitoring applications, connection to real world signals
is made via convenient 3.5mm field removable screw terminal connectors.
Inputs
Type 32 non-polarized optically isolated inputs
Voltage Range 5-30VDC
Isolation 1250VAC RMS / 1800VDC
Input Resistance 6.2K Ohms in series
Response Time 4 microseconds

17
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
440 Series – 32 Reed Relay Outputs
The SeaI/O-440 provides 32 SPST Form A dry-contact Reed relays. Reed relays offer long life performance and
fast response time. Convenient removable 3.5mm screw terminal blocks compatible with 14-22 AWG wiring
allow reliable connection to real world I/O.
USE EXTREME CAUTION!
High voltages will be present on the SeaI/O family of products when high voltage is connected. Never
handle the printed circuit board when high voltage is connected. Never handle the printed circuit board
when high voltage signals are connected to the board.
Outputs
Type 32 SPST Form A Reed relays
Power 10VA max.
Contact Voltage 60VDC max. / 50VAC max.
Contact Current 500mA max.
Operate Time 0.5ms max.
Bounce Time 0.5ms max.
Release Time 0.2ms max.

18
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
450 Series – 16 Form C Relay Outputs
Control a variety of low voltage, low current devices with the SeaI/O-450. The module’s 16 channels of highly
reliable SPDT Form C relay outputs are rated for up to 60VDC @ 2A. Each output offers normally-open and
normally-closed contact connections via 3.5mm field removable terminal blocks.
USE EXTREME CAUTION!
High voltages will be present on the SeaI/O family of products when high voltage is connected. Never
handle the printed circuit board when high voltage is connected. Never handle the printed circuit board
when high voltage signals are connected to the board.
Outputs
Type 16 SPDT Form C relays
Power DC 30W/ AC 60 VA
Contact Voltage 60VDC max. / 50VAC max.
Contact Current 2A max.
Operate Time 2ms max.
Bounce Time 7ms max.
Release Time 1ms max.

19
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
462 Series – 96 Channel TTL DB-78
Perfect for driving industry-standard solid-state relay (SSR) racks, the SeaI/O-462 provides 96 bits of buffered
drive TTL I/O. Each DB-78 connector brings out 48 I/O bits addressable as six, eight-bit ports. For easy
connection to relay racks, Sealevel offers a six-foot cable (Part# CA237) that terminates each DB-78 connector
to two industry standard 50-pin IDC connectors. Order part number 462x-KT and receive two CA237 cables with
each unit.
The SeaI/O-462 uses 74ABT245 octal bi-directional transceivers to provide TTL input/output capabilities and
can sink 64mA and source 32mA. Each bit is pulled to +5V through a 10K ohm pull-up resistor to ensure each
bit is at a known state when not driven.
Power Requirements
Max Output Power +5VDC @ 1A (5W)
Inputs
Logic High Max 0.8VDC
Logic Low Min 2VDC
Outputs
Logic High Max 0.5VDC @ 64mA
Logic Low Min 2VDC @ 32mA
The SeaI/O-462 modules are designed to work with industry standard solid-state relay racks that
expect negative logic to operate. The SeaI/O-462 modules expect negative logic on the inputs.

20
© Sealevel Systems, Inc. SeaI/O | SL9049 11/2021
SeaI/O-462 Optional Items
Depending upon your application, you are likely to find one or more of the following items useful for interfacing
the SeaI/O-462 to real-world signals. All items can be purchased from our website (www.sealevel.com) or by
calling 864-843-4343.
DB78 Male to (2) IDC 50-Pin Ribbon Connectors (Part# CA237)
The CA237 cable connects to SeaI/O TTL modules with a DB78
female connector and splits out to dual industry standard IDC 50-
pin ribbon connectors. Perfect for interfacing SeaI/O TTL modules
to industry standard relay racks where a jacketed cable is
preferred over a ribbon cable. Each leg of the CA237 is six feet in
length.
Terminal Block Kit – 50 Pin Header to Screw Terminals (Part# TB07-KT)
The TB07-KT 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. The TB07-KT
ships with a terminal block, a 6” piece of slotted Snap Track, and
two DIN-rail mounting clips.