User Manual7Chapter 3: DVR Installation3.1 Hard Drive InstallationCaution: Please do not Install or take out hard drive when DVR is running!(1) Remove screws and open DVR upper cover carefully;(2) Insert Power Cord and data cable into Pin of hard drive securely;(3) Put the upper cover back carefully, re-attach screws.3.2 Camera and Monitor ConnectionConnect camera cable to video input of DVR, and from video output of DVR to Monitor via BNCconnector (Refer to section2.2-Rear Panel); orIf the camera is a PTZ speed dome, you could connect RS485 A & B to the according port of DVRrespectively (refer to system figuration on Chapter 8).3.3 Power Supply connectionPlease only use the power adapter supplied with the DVR .