NORD Drivesystems BU0180 - Manual (Page 49)

3 Options
BU 0180 GB-0914 Pre-series version 49
3 Options
The frequency inverter provides a series of optional expansion modules. These modules are preferably
used for the direct control or connection of the frequency inverter to a higher level field bus.
The options are available both as an internal version for integration (into the FI), the so-called customer unit
SK CU4-... or as an external version, the so-called technology unit SK TU4-
… The differences between the
internal and external options are merely limited to the number of additional IOs and the permissible current
load of the connection terminals.
The internal customer interface (Customer Unit, SK CU4-...) is integrated into the frequency inverter.
The electrical connection to the frequency inverter is usually made via the internal system bus. This is
equipped with screw terminals for connection to external peripherals. As an option, there is also the
possibility of using 4/5-pin M12 plug connectors in the FI housing.
SK 1x0E with integrated customer unit SK 1x0E with attached technology unit
The external technology unit (Technology Unit, SK TU4-...) is externally attached to the frequency
inverter and is therefore easy to access. The electrical connection to the frequency inverter is made via the
internal system bus. External 4/5-pin plug connectors are available for use by the customer. A technology
unit requires the use of a suitable SK TI4-TU-
… connection unit. The optional wall mounting kit
SK TIE4-WMK-TU also allows the technology units to be mounted close to the inverter.
The frequency inverter can manage the following options via its system bus:

1 x ParameterBox SK PAR-3H and (via an RJ12 connector)

1 x Field bus option (e.g. Profibus DP), internal or external and

2 x I/O extension (SK xU4-IOE- …), internal and / or external
Up to 4 frequency inverters with their appropriate options can belong to a field bus.
WARNING
Modules must not be inserted or removed unless the device is free of voltage.