8
2.
Connections
2.1
Grounding
Grounding is of particular importance for reliable, stable operation. Communication system
characteristics may vary from system to system, depending on the system environment and
grounding method used. A ground connection with an impedance of less than 100
Ω
should be
used. Please be sure to consider the following points for making proper ground connections:
Grounding method checkpoints
1) Make solid ground connection to the ‘E’ terminial on the inverter.
2) Ensure that the metal stand-off which is located near the connector has a good
mechanical connection to the chassis of the inverter as well as to the option card.
3) Use copper wire with a cross-sectional area of 2mm
2
or larger, or aluminum wire with a cross-
sectional area of 2.6mm
2
or larger for grounding.
