51Mode switchCommunication between the recorder and a system device using PS·Data can be performed by RS 485 interface. Devices onboth ends of the RS485 connection are necessary to be terminated.The mode switch setting differs depending on whether to use the recorder as a receiver or a system controller.When connecting RS485 cameras to the recorder, devices on both ends of the connection are necessary to be terminated.• When the recorder is on the end of the connection with a sys-tem controllerPS·Data termination switch 1: On• When the recorder is on the end of the connection with adevice controllerPS·Data termination switch 2: On• When connecting RS485 camerasSet the termination switch of the RS485 port to which theRS485 camera is connectedConnect to the RS485 port 1: Set the termination switch ofthe RS485 port (1) to "On".Connect to the RS485 port 2: Set the termination switch ofthe RS485 port (2) to "On".• When connecting in 2-wire connectionConnect to the RS485 port 1: Set no. 2 and no. 3 to "On".Connect to the RS485 port 2: Set no. 5 and no. 6 to "On".• When connecting in 4-wire connectionConnect to the RS485 port 1: Set no. 2 and no. 3 to "Off".Connect to the RS485 port 2: Set no. 5 and no. 6 to "Off".RS485 portRARBTATBInside block diagramTBTARARBDATAGND GNDIN OUT6 7 81 2 3 4 5ONRS485 (1) Termination switchRS485 (1) 2-wire/4-wireconnection switchRS485 (2) Termination switchRS485 (2) 2-wire/4-wireconnection switchPS·Data termination switch 1PS·Data termination switch 2
