NORDAC Control and Parameter Boxes
42 Subject to technical alterations BU 0040 GB-1611
3 ControlBoxes
With the aid of ControlBoxes it is possible to control a frequency inverter with regard to speed and direction of
rotation.
3.1 SK SSX-3A – Simple Setpoint Box
The "Simple Set Point Box" SK SSX-3A is a
compact control unit with a 4-digit, 7-segment
display, which is primarily intended for fixed
connection to the terminal bar of the frequency
inverter.
The control unit can be used as a handheld or
attached version (wall-mounted). A maximum cable
length of 20m must be observed.
Three operating modes are available, which are
automatically activated according to the connection
variant and the inverter series.
The entire range of functions can be used with the
SK 2xxE series.
If an RS 485 interface is available, the box can also
be used with SK 300E, SK 5xxE, SK 700E and
SK 750E inverters. However, in this case only the
485C mode (control mode via RS 485) is available.
3.1.1 Installation
The box can be opened by opening the screw
fastenings at the front. The connection terminals for the
electrical connections and a 2-part DIP switch element
are located inside the box on the rear side of the cover.
In addition to an M12 cable gland, the other section of
the housing contains 2 holes for optional wall mounting.
3.1.2 Connection
WARNING
Installation must be carried out by qualified personnel only, paying particular attention to safety
and warning instructions.
Installation or removal of modules or electrical connections must only be carried out when no
voltage is present. For detailed information, please refer to the relevant frequency inverter
manual.
The Simple Setpoint Box provides various operating modes. The connection of the data or supply cables must be
made in different ways, depending on the required operating mode. Connection is made to the terminal bar by
means of a 3 or 4 wire cable. For a description of the terminal connections, please refer to Section 3.1.3 .
Connection data:
Name Value
Rigid cable cross-section 0.14 … 2.5mm²
Flexible cable cross-section 0.14 … 1.5mm²
AWG standard AWG 26-14
Tightening torque for screw
terminals
0.5…0.6Nm
Holes for wall
mounting
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