SeaMAX API Documentation

License Agreement

This software is licensed solely for use with a Sealevel Systems, Incorporated product. The user may operate the software only when utilizing the affiliated Sealevel Systems, Incorporated product.

This license is in effect until terminated by Sealevel Systems, Incorporated or the user. The user may terminate the license only if the provided software, any copies, modifications and enhancements are returned or destroyed.

In addition to all remedies, which Sealevel Systems, Incorporated may have legal and equitable, if user should breach or threaten to breach, the provisions of this license, Sealevel Systems, Incorporated may individually and without notice, terminate the license granted here under. At such time all copies, modifications and enhancements must be returned or destroyed.

By installing the software provided, the user acknowledges and agrees to all the terms and conditions of this License Agreement.


Sealevel digital and analog I/O modules supported by the SeaMAX software suite are designed to work with third party applications via the SeaMAX API. To help simplify application development, the following documentation details the functions of the SeaMAX API. To help you get started, example code is included for popular languages and compilers.

There are four modules that are included in the SeaMAX API:

  • SeaMAX API
    The foundation of SeaMAX with functions for configuring, interfacing, and modifying supported Sealevel digital I/O modules and devices.
  • SeaMAX Ethernet Discovery / Configuration API
    The Ethernet module contains functions related to the discovery and configuration of Sealevel I/O devices with an Ethernet interface.
  • SeaDAC Lite Discovery API
    The SeaDAC Lite module contains the programmatic functions for locating and identifying SeaDAC Lite modules.
  • Version 2.x Deprecated Interface
    SeaMAX v3 has been completely rewritten with a focus on increasing speed and improving reliability. This module provides backwards compatibility with legacy SeaMAX v2 code.

Getting Started

The SeaMAX API manual contains numerous documents to assist you with application development. Three key documents are highlighted in order of importance.

The 'Modules' tab above lists all SeaMAX modules and their functions. For additional information regarding legacy products and technical specifications, please refer to the 'Related Pages' tab above.

Quickstart for Modbus Users

SeaI/O and SeaDAC modules are designed to be Modbus RTU / TCP compatible.


Sealevel Systems, Incorporated makes no implied or express warranty of any kind with regard to this software or the documentation that is included. Sealevel Systems, Incorporated will not be liable for damages of any type resulting from the performance, use or furnishing of any of the supplied software. Any liability of Sealevel Systems, Incorporated will be limited to a refund of the purchase price or product replacement.


This software is protected by United States copyright law, and international treaty provisions. User acknowledges that no title to the intellectual property in the software is transferred to user. User further acknowledges that title and full ownership rights to the software will remain the exclusive property of Sealevel Systems, Incorporated, and user will not acquire any ownership rights to the software. User agrees that any copies of the software will contain the same proprietary notices, which appear on and in the software.

Questions & Comments

Send your questions and comments to Sealevel Systems. For technical assistance, please include your model or part number and any device settings that may apply. Technical support is available Monday to Friday from 8:00AM to 5:00PM (US Eastern Time Zone, UTC-5 hours) by email ( or by phone at +1 (864) 843.4343.

Generated on Mon Nov 26 2018.