The eMerge MicroNode brings new levels of convenience and capability to access control systems; two card readers, four inputs, four outputs, and one temperature point - all housed in a 7-inch square package. Beyond its convenient size is the fact that the MicroNode can be powered by a standard 12 VDC power supply or Power-over-Ethernet (PoE) which powers all components including electric locking devices. As a native IP-based network appliance, the eMerge communicates over familiar LANs or WANs after obtaining an IP address by DHCP or static configuration. Like all eMerge components, the MicroNode secures its own communications, making it safe for deployment over public networks, including the Internet. As with the larger eMerge Expansion Node (EXN), the MicroNode is automatically discovered and supports visual configuration in any Web browser through the eMerge Network Controller (NC). Connection over an IP network using PoE is advantageous because it provides a single cable connection with a central point for battery backup. When using this method, all access control functions - including electric locks - continue to operate during power outages without the need for multiple independent battery backup units. Because the MicroNode is remote from the card readers and other components, it can be placed safely on the secure side of a barrier (typically in a wall or drop-ceiling) so that compromising an externally mounted card reader does not expose the data network. In fact, the MicroNode is typically a direct replacement for legacy two-reader access control devices, making it the ideal retrofit device for older technology access control systems without replacement of readers, inputs, or lock outputs. MicroNode even provides a 12 VDC output for powering PIRs and similar REX devices. The MicroNode is supplied in a 7-inch square mounting box with tamper switch, status indicator light, and keyed lock. The board set is mounted to a removable back plate to facilitate wiring in confined spaces.