Ametek Sorensen XEL Serie Mode D'emploi page 19

Warning! Voltages above 70Vdc are hazardous live according to EN 61010-1 and great
care must be taken when using the power supply at voltages above this level.
Ensure that the exposed end of the wire is fully inserted and inaccessible to the touch.
Always make connections to the instrument with the OUTPUT off.
Make sure that the circuit to which connections are made is appropriately
insulated; no accessible parts of the external circuit should become hazardous live
in normal or single fault condition as defined by EN61010-1.
To avoid instability and transient response problems, care must be taken to ensure good coupling
between each output and sense lead. This can be done either by twisting the leads together or by
using coaxially screened cables (sense through the inner). An electrolytic capacitor with a suitable
voltage rating directly across the load connection point may also be beneficial. The voltage drop in
each output lead must not exceed 0.5 Volts.
Switch the LOCAL/REMOTE switch back to LOCAL when remote sensing is not in use.
Output Connection and Remote Sensing on Programmable Models
All programmable models have duplicate rear panel Output terminals, appropriate for when the
instruments are used in a rack. Should remote sensing be required the front sense terminals can
be used. Connect the Sense terminals to the load, following the guidelines above, and set the
LOCAL/REMOTE switch to REMOTE.
If the rear panel Output terminals are used without remote sense make sure that the front panel
switch is set to LOCAL.
Series or Parallel Connection with Other Outputs
The outputs of the power supply are fully floating and may be used in series with other power supply
units to generate high DC voltages up to 300V DC.
The maximum permissible voltage between any terminal and earth ground (
Warning! Voltages above 70Vdc are hazardous live according to EN 61010-1 and great care
must be taken when using the power supply at voltages above this level.
Always make connections to the instrument with the OUTPUT off.
It should be noted that the unit can only source current and cannot sink it, thus units cannot be
series connected in anti-phase.
The unit can be connected in parallel with others to produce higher currents. Where several units
are connected in parallel, the output voltage will be equal to that of the unit with the highest output
voltage setting until the current drawn exceeds its current limit setting, upon which the output will fall
to that of the next highest setting, and so on. In constant current mode, units can be connected in
parallel to provide a current equal to the sum of the current limit settings.
Protection
The output has intrinsic short-circuit protection and is protected from reverse voltages by a diode;
the continuous reverse current must not exceed 3 Amps, although transients can be much higher. If
the applied reverse voltage can source more current than the set current limit, and the output is on,
then the output will go into current limit (the CC indicator will flash) and its display will show the
reverse voltage across the protection diode; if the output is off, just the CC indicator will flash.
In common with all series regulated single-ended power supplies, the unit is not capable of sinking
current provided from an external source. If a voltage greater than the set output voltage of the unit
is applied from an external source, the internal regulator will turn off and no current will flow; if the
output is turned on the voltage meter will read the applied voltage. No damage will result providing
the applied voltage does not exceed the rated output voltage of the power supply.
) is 300VDC
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