Control Unit - Vacon NXP/C 5 Series User Manual

INSTALLATION INSTRUCTIONS
7.2

Control unit

The control unit of the frequency converter consists roughly of the control board and additional boards (see
Figure 7-1 and Figure 7-2) connected to the five
board is connected to the power unit through a D-connector (1) or fibre optic cables.
Figure 7-1. NX control board
Usually, 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 relay board) which are normally installed in slots
A and B. On the next pages you will find the arrangement of the
two basic boards, the general wiring diagram
at the factory are indicated in the type code. For more information on the option boards, see Vacon NX
option board manual (ud741).
The control board can be powered externally (+24V, ±10%) by connecting the external power source to
either of the bidirectional terminala #6 or #12, see page 42. This voltage is sufficient for parameter setting
and for keeping the fieldbus active.
Note! If the 24V inputs of several frequency converters are parallelly connected we recommend to use a
diode in terminal #6 (or #12) in order to avoid the current to flow in opposite direction. This might damage
the control board. See picture below.
24-hour support +358 (0)40 837 1150 • Email: vacon@vacon.com
slot connectors
and the control signal
+ - + - +
#6 #7 #6 #7 #6
(A to E) of the control board. The control
A
Figure 7-2. Basic and option board connections
on the control board
control I/O and the relay terminals
descriptions. The I/O boards mounted
External
+24V
- + -
#7 #6 #7
nk6_17
vacon • 39
E
D
C
B
of the
7