Lenze 520 Series - Operation with External Current Limitation (Torque Limit); Actual Value Feedback

4Q - DC Chopper 520 series
47
4.2.4 OPERATION WITH EXTERNAL
R?21R?7
CURRENT LIMITATION <TORQUE LIMIT)
Differen~ ways of current or torque limita~c>n
are possibLe us~ng externaL clrcuits via
terminals 40 and 44.
Example: If switch S1 is in normal position,
the internal current limitation is active
(trimmer Imaxb
If you open switch S1, the current limitation
changes depending on the wiper position of
R2.
Use bw current contact 20V/1 mA
4.2.5 ACTUAL VALUE FEEDBACK
The chopper can only be operated with
tacho voltage feedback. The tachogenerators
must provide a voltage which depends on
the direction of rotation (e.g. DC
tachogenerator>.
The internal potentiometer, which is located
at the front side must be set fully CCW
(Caution: 15-turn potentiometer).
R2
1OKVV.
R2
10K
Lenze