Connections Contact Closure 25 pin D-type connector providing 8 up to isolated inputs and 8 relay contact closure outputs Inputs Optical isolators triggered by connection to ground (maximum 5 V @ 14 mA) Outputs Mechanical relay contact closure to ground (maximum 30 V @ 1 A) Ethernet 10 / 100 BaseT with loop through for connecting to other ethernet enabled equipment Computer Interface 1 x USB 2.0 high speed interface for configuration and firmware updates Extras Software Included Configured via ATEM Switcher utility Firmware Upgrade Firmware built into software driver. Loaded at system startup or via updater software Operating System Microsoft Windows 7 and Apple Mac OS X Power Supply 12V power supply included with international socket adapters for all countries