User Manual

Page 58
ELR 9000 Series
www.elektroautomatik.de
[e-mail]
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
► How to start and stop a function:
1. The function can be started either by tapping or operating the “On/Off” button, if the DC input
is currently switched off. The function then starts immediately.
During the progress of the functions sine wave, rectangular wave, triangular wave, trapezoi-
dal wave or ramp no actual values are displayed.
2. The function can be stopped either by tapping or operating the “On/Off” button. However, there
is a difference:
a) The key stops only the function, the DC input remains ON with the static values.
b) The “On/Off“ button stops the function and switches off the DC input.
A device alarm such as overvoltage, overheating or power failure stops the function progress
automatically and the DC input is switched off.
3.8.5 Sine function
The following parameters can be congured for a sine wave function:
Value Range Description
I(A), U(A) 0...(Nominal value - (Off)) von
U, I
A = Amplitude of the signal to be generated
I(Off), U(Off) (A)...(Nominal value - (A)) von
U, I
Off = Offset, based on the zero point of the mathematic sine
curve, may not be smaller than the amplitude.
f (1/t) 1...1000Hz Static frequency of the signal to be generated
Schematic diagram: Application and result:
Offset
Amplitude
t
A
f
Amplitude
A normal sine wave signal is generated and applied to
the selected set value, e.g. current (I). At a constant
input voltage the current input of the load will follow a
sine wave.
For calculating the maximum power input the amplitude
and offset values for the current must be added.
Example: with an input voltage of 100V and sin(I) se-
lected, set the amplitude to 30A and the offset to 50A.
The resulting maximum input power is then achieved at
the highest point of the sine wave and is (30A + 50A) *
100V = 8000W.