Revision History

This page provides a summary of revisions made, listing the month and year of each update along with a brief description of the changes made.

Month & Year	Description
May, 2026	Updated IMPORTANT SAFETY INSTRUCTIONS section to revise the warning regarding installation and servicing by a certified technician and to add warranty implication. Added a warranty limitation Caution in the Introduction and Install the Surface Mount Plate chapters.
February, 2026	This version includes the following changes: Added a note in the Introduction chapter, under the Pairing Two Express 250s section. Added the weight of one Power Module in the Civil and Mechanical Design chapter, under the Component Dimensions and Weight section. Added maximum amperage information (up to 80 A) in the Electrical Design chapter. Added the Power Select Configuration and Circuit Protection section in the Electrical Design chapter.
December, 2025	This version includes the following changes: Introduced a new Connectivity chapter detailing procedures for testing cellular connectivity. Revised the chapter Concrete Mounting Template with current instructions. Added a new chapter Install the Surface Mount Plate to include instructions for installing the Express 250 on existing concrete surface.
September, 2025	In section Electrical Design, added information related to auto transformers and neutral-to-ground bonding.

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