CPS-EX2000(R2) MANUAL
Camtec Power Supplies GmbH - Gewerbestrasse 30 - DE-76327 Pfinztal / Germany
P.9/21 (07/2017.01.3)
Tel. +49 (721) 46596 - 0 Fax +49 (721) 46596 - 77
www.camtec-gmbh.com
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(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)
Over Load Behaviour
The CPS-EX changes from the standard operation mode into the high current mode when high and quick
overload occurs. Thus, it provokes a restart after a 30ms break and delivers continuous current to the output.
This special behaviour is a protection for the power supply and for the connected load.
Compensation of Load Line Drop Voltage (Sense ++/--), standard operation mode
The CPS-EX 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. If sense is not used, CON4 Sense +/+ and Sense -/-
shall necessarily be connected by short bridges to the power outputs (factory setup).
Sense operation: Remove the bridges between Sense +/+, Sense -/- and the power outputs. Connect the sense
lines directly to the load. It is irrelevant which of the local connections Sense +/+ and Sense -/- are applied. 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 cermic 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 table).
Operating in the sense mode requires that the maximum output voltage will not be exceeded. Maximum 2V per
load lead can be compensated. The voltage drop in the load lines decreases the maximum output voltage
rating. Example of a 30V unit: if the total voltage drop in the load leads is 2V you must subtract this value from
the maximum programmable output voltage 30V – 2V = 28V maximum available voltage at the load.
The sense terminals are directly connected to the power outputs.
Lokal Sensing
Remote Sensing
(factory setup) (twisted sense lines)
WARNING! PROTECT TO MIX UP SENSE CONNECTIONS. THIS COULD CAUSE SERIOUS DAMAGE TO
THE DEVICE.
Compensation of Load Line Drop Voltage (Sense ++/--) battery charger operation mode
Remote Sensing as a battery charger
If the CPS-EX 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.
