HSEUREG04801(R2) MANUAL
Compensation of Load Line Voltage Drop (Sense +/-), standard operation mode
The HSEUREG power supply has a Sense Mode to compensate for the
voltage drop over long load lines. The compensation amounts to a
maximum of 2V per load line. Under certain circumstances, it can be
expected to apply more complicated external interference suppression.
Sense operation:
Connect the sense lines directly to the load. Pay attention to the polarity of
plus and minus of the load to prevent damage to the power supply. To
avoid interference, twist the sense lines. To reduce inductive effects, we
recommend that the load lines position is close to each other. To supply a
pulsating load, the use of an electrolytic capacitor and a ceramic capacitor
has proved. The internal Over Voltage Protection (OVP) of the power
supply controls the DC power directly to the DC output terminals. In case of
an error the OVP acts automatically (see OVP values corresponding
technical table page 3).
Local Sensing:
When the sense lines are not connected to the load
connect directly to the power outputs to allow proper operation.
Remote Sensing Schematics:
Although the HSEUREG sense block is
simpler, it applies to the shown schematics. Please note that the
HSEUREG has no AUX connection feature and that the sense block has
only +/- connections. We recommend twisted sense lines.
Local Sensing:
Remote Sensing:
Compensation of Load Line Drop Voltage (Sense +/-), battery charger operation mode
Remote Sensing as a battery charger
If the HSEUREG power supply unit is used as a battery charger, it is recommended to refrain from sensing. It
can lead to severe damage to the power supply, if the polarity of the sense line is confused (field experience:
such error often occurs when system service is required, e.g., when the batteries are changed). If it is
necessary to use sensing, proceed as described in the figure below. Proven approaches are 250mA for the
fuses and 3...5A load capacity of diodes.
Although the HSEUREG sense block is simpler, it applies to the below schematics. Please note that the
HSEUREG has no AUX connection feature and that the sense block has only +/- connections. We recommend
twisted sense lines.
External Shutdown (SD)
The power supply is set to the Shutdown mode, when the control input is
either shorted via a relay contact, a switch contact or an NPN transistor
with open collector (voltage drop <1V, current typ. 2,3mA).
If the shutdown repeals the power supply starts with a typical delay of
250ms.
Using the soft start, the current and the voltage rises within 100ms
continuously to the default set values. Note that the input is not floating.
The common ground is internally connected to the Sense-. The Sense- is
connected to DC-minus output.
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