Ethernet Modbus TCP to 32 Isolated Inputs

Part: 430E   Model: SeaI/O-430E

(1 customer review)


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Interface 32 optically isolated inputs via any Ethernet connection with the SeaI/O-430E. Inputs can range from 5-30VDC and provide 300V external isolation and high channel-to-channel isolation. Connection is made using convenient 3.5mm removable screw terminal connectors. The SeaI/O-430E is powered from your 9-30VDC source, or select from a variety of Sealevel power supply options.

Communicate with the SeaI/O-430E using industry-standard Modbus TCP protocol or use the Sealevel SeaMAX API software libraries from your application program. Sealevel’s SeaMAX software drivers and utilities make installation and operation easy using Microsoft Windows and Linux operating systems.

The Sealevel Modbus Connect app for iOS allows you to access the registers, coils and discrete I/O of your Sealevel Modbus devices and is available on the App Store. Use the app to remotely access I/O in the field or for testing and troubleshooting during application development.

Expand your I/O network with SeaI/O N-series products. SeaI/O modules are available with Reed and Form C relays, optically isolated inputs, TTL interfaces, A/D and D/A functionality. Up to 246 additional expansion modules can be added using convenient pass-through connectors.

Get a jump start on your digital I/O development with The Digital I/O Handbook that will provide helpful information that you will use again and again. Check out Chapter 1 for an overview of logic principles.

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Additional information



Digital I/O

Isolated Inputs


7.5 (L) x 5.1 (W) x 1.3 (H)

Extended Temperature

Call for Options

Humidity Range

10 – 90% Relative Humidity, Non-Condensing

Input Isolation


Input Range

5-30 VDC

Input Impedance

6.2K Ohms (in series)

Host Interface(s)


Number of Inputs/Outputs

32 Inputs

Operating Temperature

0°C to 70°C (32°F to 158°F)

# of Ports


Power Requirement

9-30 VDC @ 1.9W

RoHS Compliant


Storage Temperature

-50°C to 105°C (-58°F to 221°F)

  • 10/100BaseT Ethernet Modbus TCP interface
  • 32 optically isolated inputs
  • Removable screw terminals simplify field wiring
  • Input power via terminal block or modular connector
  • DIN rail mount or table mount
  • Sealevel SeaMAX software supports Microsoft Windows and Linux operating systems

Windows Software

Software: SeaMAX - Windows

Linux Software

Software: SeaMAX - Linux

1 review for SeaI/O-430E

  1. A+ Tech

    Device Review / Usage
    The 430e is a great device for taking in larger quantities of sensors from different devices. On one of our projects we are using it to bring in 90 inputs across 3 of the 430e devices on a single site and it is working very well. The API was easy to write connectors to and we are easily using 3rd party software to monitor the sensors. The only feature I would like to see added is adding the ability to inject the voltage into the input device that is required to trip the relay. On each bank I would like to be able to select within the GUI if there is voltage present from the source or if I would like voltage sent via the common. If this could be done I would be able to significantly reduce my wiring density and necessity for jumpers everywhere to accommodate this need. For example, if I am monitoring a specific sensor that provides a dry contact I currently need to connect a power source to the contact and ground the common of the I/O bank I am sensing from. PoE power would also be a nice feature but there may be power restrictions there, PoE+ may be a solution for that though.

    4 Stars, adding those feature would bring it to an exceptional 5 stars!

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