Mercury Security, a global leader in OEM access control hardware and part of HID Global, today announced its powerful new family of MR Series 3 Serial Input/Output (SIO) modules that extend integration capabilities, enhance cyber security and provide seamless upgrades for existing Mercury based deployments. The next-generation SIO modules are built on the Authentic Mercury open platform and provide OEMs, channel partners and end customers the flexibility to choose the controller configuration that best fits their needs.