ABB NETA-21, User Manual

Page: 26 / 196

26 Electrical installation
Grounding
Use a grounding clip to connect the ground of the NETA-21 to the mounting rail. Make sure
that he mounting rail is grounded to a noiseless ground. If the rail is not mounted on a
properly grounded base, use a separate grounding conductor. The conductor must be as
short as possible and its cross-sectional area must be 6 mm
2
at least.
Do not use any solid copper conductor (only stranded wire is allowed).
Power connections
Connect the power supply to connector X1 of the NETA-21. The NETA-21 supplies also
the NEXA-21. For information on the connector type, voltage and power specification, see
Technical data of the NETA-21 and the NEXA-21 .
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.
Communication connections

Data link connections –
Drive with the ACS-AP-x panel
The maximum number of devices per panel port bus is 32.
Set a unique ID to each node on the panel bus. See the appropriate drive manual.
Termination switch of
the bus
ABB drive,
converter or
inverter
NETA-21
PC
PC
ETH1
ETH2
Link to Ethernet networks
PNL1
PNL2
Note: The RJ45 connectors of the control panel are located in the “ceiling” of the control panel housing.
Beside the left-hand side RJ45 connector in the control panel housing there is a switch that must be pushed
upwards in the last drive of the chain to terminate the bus.
Termination switch of
the bus
ABB drive,
converter or
inverter
ABB drive,
converter or
inverter
ABB drive,
converter or
inverter