• Firstly, wire the twisted power line to the terminal block, then install the terminal block to the
NB Units.
Use power lines with AWG#12 to #26 thick, peel the coating 6.5 mm length, followed by
tightening the screw with 0.3 to 0.5N torque. Make sure the screw of the terminal block is
tightened firmly. Only NB3Q-TWB has a different pin arrangement of the terminal block.
Do not make use of the terminal block of NB3Q-TWB for other equipments.
The NB unit has a functional earthing terminal ( ).
Arrange the wiring according to the following conditions.
1
When a potential difference occurs between the NB Unit and the host, arrange the earthing as
illustrated. If the distance is too long to realize a single-point earthing, do not ground the
earthing terminal of the NB Unit.
2
When the NB Unit, and noise source equipments such as motors and inverters, etc. are
installed on the same panel, do not ground the earthing terminal of the NB unit.
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