(half-duplex), 1 RS-232. Front panel: 2 × USB 2.0; Rear panel: 1 × USB 3.0. Controllable 12 VDC, 1 A power output for external alarm device; The power will be turned on when the alarm output is triggered. The Ctrl 12V power is controlled by alarm output 9. 12 VDC, 1 A ...