... can be. YX-ZD-E2000-type cable vibration detection and alarm devices (referred to as: vibration cable, fiber-optic alarm, vibration, optical ... principle YX-ZD-E3000 series is by detecting analysis sensor cable for external force vibrations or shaking , internal transmission ... : 1 485 signal output , 3 groups digital output , 1 usb interface 485 bus communication interface : 2 line half - duplex 485 ...