© EA Elektro-Automatik in 2022, this information is subject to change without notice
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06230820_manual_psi_10000_3u_15kw_en_01
3.10.9
DIN 40839 function
This function is based on the curve defined in DIN 40839 / EN ISO 7637 (test impulse 4), and is only applicable to voltage. It
shall replicate the progress of automobile battery voltage during engine starting. The curve is divided into 5 sequence points
(see diagram below) which each have the same parameters. The standard values from the DIN are set already as default
values for the five point.
The following parameters can be configured for the DIN40839 function:
Parameter
Range
Seq Description
Start
0...Nominal value of U
1-5
Start voltage of the ramp in part 1-5 (sequence point)
Uend
0...Nominal value of U
1-5
End voltage of the ramp in part 1-5 (sequence point)
Time
0.1 ms...36,000,000 ms
1-5
Time of the ramp
Cycles
0...999
-
Number of repetitions of the entire curve (0 = ∞)
Time t1
0.1 ms...36,000,000 ms
-
Time after cycle before repetition (cycle <> 1)
U(Start/End)
0...U
Nom
-
Voltage setting before and after the function run
I/P
0...I
Nom
/P
Nom
-
Global set values of current and power
Schematic diagram:
Application and result:
t
U
U
st
ar
t
1
2
3
4
5
t1
Sequence points
The function isn’t suitable for standalone operation of a power sup-
ply, but optimal for a power supply operation in conjunction with an
electronic load, for example one from ELR 10000 series. The load
acts as a sink for the rapid fall of the output voltage of the power
supply enabling the output voltage progress to follow the DIN curve.
The curve conforms to test impulse 4 of the DIN. With suitable set-
tings, other test impulses can be simulated. If the curve in sequence
point 4 should be a sine wave, then these 5 points would have to be
transfered to the arbitrary generator.
3.10.10
Arbitrary function
The arbitrary (freely definable) function or function generator offers the user a wider scope of options. There are 99 curve
segments (here: sequence points) available for use on either current (I) or voltage (U), all of which have the same set of pa-
rameters but can be differently configured, so that a complex function curve can be “constructed”. An arbitrary number out
of the 99 sequence points can run in a sequence point block and this block can then be repeated up to 999 times or infinitely.
Since the function must be assigned to either current or voltage, mix assignments of sequence point to both is not possible.
The arbitrary curve can overlay a linear progression (DC) with a sine curve (AC) whose amplitude and frequency is shaped
between start and end. When both, start frequency and end frequency, are 0 Hz the AC overlay has no impact and only the
DC part is effective. Each sequence point is allocated a sequence point time in which the AC/DC curve from start to end will
be generated.
The following parameters can be configured for each sequence point in the arbitrary function:
Parameter
Range
Description
AC start
AC end
0...50% Nominal value of U or I
Start/end amplitude of the sinusoidal AC part
DC start
AC start...((Nominal of U or I) - (AC start))
Start amplitude of the DC part
DC end
AC end...((Nominal of U or I) - (AC end))
End amplitude of the DC part
Start frequency
End frequency
0 Hz...10000 Hz
Start/end frequency of the sinusoidal AC part
Angle
0°...359°
Start angle of the sinusoidal AC part
Time
0.1 ms...36,000,000 ms
Time for the selected sequence
