A-ISOMETER® IRDH375 IRDH375B - Bender

Serial interfaces6.3 Topology RS485 network (IRDH375B)The optimum topology for the RS485 network is a daisy-chain connection.In this connection, device 1 is connected to device 2, device 2 to device 3,device 3 to device n etc. The RS485 network represents a continuous pathwithout branches.6.3.1 Correct arrangementThree examples for correct arrangement:6.3.2 Wrong arrangementThree examples for wrong arrangement:6.3.3 WiringA suitable type of cable for the wiring of the RS485 network is:screened cable, wire cross section 0.6 mm 2(e.g. JY[ST]Y 2 x 0.6), screen on one side connected to earth (PE).Connection to the terminals A and B.The number of bus nodes is restricted to 32 devices. When more devices areto be connected, Bender recommends to use an RS485 repeater DI1.33 641 32DI156 TGH1352en/11.2004