Bender ISOMETER IRDH375 - RS-485 Interface with BMS Protocol (IRDH375 B)

Serial interfaces
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IRDH375_D00124_05_M_XXEN/01.2020
7.3 Topology RS-485 network (IRDH375B)
The optimum topology for the RS-485 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 RS-485 network represents a continuous path without
branches.
7.3.1 Correct arrangement
Three examples for correct arrangement:
7.3.2 Wrong arrangement
Three examples for wrong arrangement:
7.3.3 Wiring
A suitable type of cable for the wiring of the RS-485 network is:
screened cable, core diameter 0.6 mm
(e.g. J-Y(St)Y 2x0.6), screen on one side connected to earth (PE).
Connection to the terminals A and B.