NETA-21 remote monitoring tool 7
Electrical installation
Grounding
The ground of the remote monitoring tool is connected to the mounting rail by means
of an grounding clip. The mounting rail onto which the remote monitoring tool is to be
mounted must be grounded to a noiseless ground. If the rail is not mounted on a
properly grounded base, a separate grounding conductor must be used. The
conductor must be as short as possible and its cross-sectional area must be 6 mm
2
at
least.
Note:
No solid copper conductor may be used (stranded wire allowed only).
Power connections
Connect the power supply to connector X1 of the NETA-21 module. The NETA-21
supplies also the NEXA-21. For information on the connector type, voltage and power
specification, see
.
Note:
In the NEXA-21, there is an alternative power supply input (X11), which you
can use for supplying power to the NEXA-21 and the NETA-21.
Connections with drives, converters and inverters
The remote monitoring tool is compatible with various ABB drives, converters and
inverters.
As shown on page
, the NETA-21 can be connected directly to a panel bus if the
drive (/inverter/converter) has an Assistant control (ACS-AP-x) panel.
If the unit to be monitored does not have the ACS-AP-x panel but it is equipped with
an RDCU control unit, you can connect the unit to the NETA-21 through the fiber optic
channel of the NEXA-21. See the connections diagrams in section
connections – Drive (/converter/inverter) with the RDCU control unit
Summary of Contents for NETA-21
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