CPS-i3000(R2) MANUAL
Camtec Power Supplies GmbH - Gewerbestrasse 30 - DE-76327 Pfinztal / Germany
P.10/22 (04/2016.01.5)
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)
Compensation of Load Line Drop Voltage (Sense ++/--) battery charger operation mode
Remote Sensing as a battery charger
If the CPS-i 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.
Master-Slave Mode Analogue Interface (Ureg-OUT/Ireg-OUT)
The CPS-i laboratory power supplies offer the possibility of Master-Slave operation. To increase the output
current, up to 5 units of the same type and output voltage can be connected in parallel with the standard
analogue interface. One device takes over the function of the master, the other devices assume the slave
function. The Current Share Bus (CS) marries the involved power supplies together. The CS bus allows a
symmetrical current distribution in parallel operation of several identical CPS-i units.
Define the power supply as the master, which you want to address with your control. A coding of the power
modules as the master or the slave is required (see below table). The signals of the interface are looped
together. Connect Ureg-OUT and Ireg-OUT of the master to Ureg-IN and Ireg-IN from to slave. Connect the
corresponding Ureg-OUT/Ireg-OUT from the slave to the next slave, etc. All the monitoring signals of each
power supply are still available.
Master
Slave
0-5V
0-10V
0-20mA
4-20mA
Potis
0-5V
0-10V
0-20mA
4-20mA
Potis
S1
0
0
1
1
0
S1
0
0
0
0
0
S2
0
1
1
0
0
S2
0
0
0
0
0
S3
0
0
0
1
0
S3
0
0
0
0
0
S4
0
0
1
1
0
S4
0
0
0
0
0
S5
0
1
1
0
0
S5
0
0
0
0
0
S6
1
0
0
0
1
S6
1
1
1
1
1
S7
0
0
0
1
0
S7
0
0
0
0
0
S8
0
1
1
1
0
S8
0
1
1
1
0
S9
0
1
1
1
0
S9
0
1
1
1
0
S10
0
1
1
1
0
S10
0
1
1
1
0
S11
0
0
0
0
0
S11
0
0
0
0
0
S12
1
1
1
1
1
S12
1
1
1
1
1
Current Distribution in Parallel Mode (CS), CSB Current Share Bus
In parallel operation, a uniform current distribution between the participating power supplies is important. To
prevent one of the power supplies going early into the current limitation and display error message. An uneven
load and thus premature aging of the participating devices is prevented.
Connect CON3 contact 5 (CS) to contact 13 of the slave. Are other devices involved in the parallel operation,
you may grind the CS bus through from unit to unit. The current division between the devices will be performed
automatically. The accuracy of the current distribution is max. ±5% at Iout
≥
0.5xIout max. Derate total output
current by 5% to prevent unit overload condition.
