Nx Networks NX series user manual 4086, Control unit, Control connections

40(86) 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).

B C D E

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.

6.2.1Control connections

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.

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