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10 NETA-21 remote monitoring tool
The figure below shows the data connections in a star topology when a fiber optic link
is used.
MSTR
CH0
CH1
NDBU-x5
ABB drive,
converter or
inverter
T
T
R
R
Drive/converter/inverter 1 to CH0 … drive/converter/inverter 9 to CH8
Tx
Rx
N
EXA-21
PC
ETH1
ETH2
NETA-21
PC
Link to Ethernet networks
RDCO
RDCU
ABB drive,
converter or
inverter
RDCO
V101
V102
V103
V104
V105
V106
RDCU
Summary of Contents for NETA-21
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