3 Sep 2026

Mercury Security, a pioneer in open architecture access control hardware and a HID brand, announces its Mercury S4 I/O Module family. The new generation of intelligent modules is designed to help organisations modernise and expand physical access control infrastructure, building on the infrastructure they already have in place.

As organisations expand facilities, adopt cloud and mobile technologies, and respond to evolving cybersecurity requirements, many are also looking for ways to modernise aging access control infrastructure without the cost and disruption of repeated hardware replacements. Mercury S4 I/O Modules extend the company's trusted intelligent controller architecture with a secure, modular platform that enables organisations to expand systems more efficiently, keep systems running and prepare for future technology requirements.