Datasheet

Camtec Power Supplies GmbH – Gewerbestrasse 30 – D-76327 Pfinztal – Germany p.5/8 (12.2017.02.0)
Phone [phone] - Fax [phone] – www.camtec-gmbh.com - [e-mail]
(Subject to alterations. This product is not designed to be used in applications such as life support systems wherein a failure or malfunction could result in injury or death)
Compensation of Load Line Drop Voltage (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 fairly 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. In order to reduce inductive
effects, we recommend that the load lines position is close to each other. In order 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).
The sense terminals are directly connected to the power outputs.
Remote Sensing Schematics
Although the HSEUREG sense block is more simple, 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.
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 absolutely
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 more simple, 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.