Viconics VTR7300 BACnet Integration Manual - Manual (Page 26)

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Figure 5: Correct usage – repeaters are daisy chained to the supervisory
controller and separate daisy chains branch from each repeater.
Do not install repeaters in series, as this may result in network reliability problems. Figure 6 demonstrates
an incorrect use of a repeater in an EIA-485 network.
Figure 6: Incorrect usage – the second repeater in series may result
in an unreliable system