NORD Drivesystems BU0750 - Manual (Page 47)

3.4 Overview of special extensions
BU 0750 GB-3311 Subject to technical amendments 47
3.4 Overview of Special Extensions
The special extensions (EXtension
Unit) turn the standard frequency
inverter into a high-precision control
unit, which can flexibly react to all
requirements. The extensions can be
used on the right hand guide rail in the
frequency inverter, in addition to the
customer units. After insertion, they
are automatically identified by the
frequency inverter.
Cable connection is via direct plug-in
clip connectors with spring terminals.
This makes the connection of devices
very easy and convenient.
NOTE
With the customer units (SK CU1- …) there is no difference between IP protection classes. This
means that the same customer units are used for both the air cooled SK 750E (IP54) and for the
water cooled version (IP65).
Option Description Data
Encoder
SK XU1-ENC For highly accurate speed control from standstill to
double the rated speed
1 x digital inputs
1 x incremental encoder input, 5V TTL
up to 250kHz
PosiCon
SK XU1-POS
Position and speed regulation
Programmable positions are reached and maintained by
means of path calculations. The detection of the actual
value is by means an incremental and/or absolute
encoder
Up to 252 positions
6 x digital inputs
2 x multi-function relays
1 x absolute encoder input, SSI
1 x incremental encoder input, 5V TTL
up to 250kHz
NOTE for 5V / 15V power supplies
The customer units and special extension units have various power supplies (5V / 15V) which
can be used externally. The maximum permissible external load current is 300mA. This can
be taken from one or more power supplies. The total current must however not exceed
300mA.
All control voltages are related to a common reference potential!
Potentials AGND /0V and GND /0V are internally linked in the device.