Lenze E70AC Series Hardware Manual page 36

4 Technical data
Rated data
Supply modules
Rated data for internal brake chopper
To be able to dissipate the excess energy produced during operation in generator mode,
the power supply modules are equipped with an internal brake chopper/brake transistor.
For this purpose, an external brake resistor corresponding with the technical data from the
optional accessories must be connected to X103.
If the DC−bus voltage exceeds 765 V, the brake chopper connects the external brake
resistor.
In order to increase the braking power, several power supply modules with a brake chopper
and a brake resistor can be used in parallel. Additional information can be obtained from
page 121.
Type
E70ACPSx0304x
E70ACPSx0604x
The trouble−free operation of power supply modules with an external brake resistor is only
ensured if an axis module is installed in the immediate vicinity. Preferably by end−to−end
mounting and use of the DC busbar system (X101/X102).
36
RBmin I
BRmax
[W] [A]
18 42.5
9 85.0
R Minimum brake resistance, nominal value ±10 %
Bmin
I Peak current
BRmax
P Peak braking power
BRmax
I Continuous current RMS − important for the dimensioning of the cables
BRd
P Continuous braking power
Bd
t Cycle time, periodic load change with running time and recovery time
Z
t Running time
on
t − t Recovery time
Z on
t Maximum running time without initial load and compliance with the recovery
fp
time
l
P I P
BRmax BRd Bd
[kW] [A] [kW]
32.5 16.7 5.0
65.5 33.4 10.1
t t t
Z on fp
[s] [s] [s]
97 15 15
97 15 15
EDS700ACBA EN 5.1