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Cabling and connections
6.2 Control unit
The control unit of the frequency converter consists roughly of the control board and additional
boards (see Figure 6-12 and Figure 6-13) connected to the five slot connectors (A to E) of the
control board. The control board is connected to the power unit through a D-connector (1).
E
D
C
B
A
Figure 6-12. NX control board
Figure 6-13. Basic and option board connections
on the control board
When the frequency converter is delivered from the factory, the control unit includes at least the
standard compilation of two basic boards (I/O board and thermistor board) which are normally
installed in slots A and B. The next pages show the arrangement of the
control I/O and the relay
terminals
of the two basic boards, the
general wiring diagram
and the
control signal
descriptions.
The control board can be powered externally (+24V) by connecting the external power source to
the bidirectional terminal #6, see page 43. This voltage is sufficient for parameter setting and for
keeping the fieldbus active.
Control connections
6.2.1
The basic control connections for boards A1 and A3 are shown in Chapter 6.2.2.
The signal descriptions of the Standard Application are presented in Chapter 2 of the Application
Manual. If some other application is used, check the Application Manual for the signal
descriptions of the respective application.
6
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