Made in Germany
Camtec Power Supplies GmbH - Gewerbestraße 30 - DE-76327 Pfinztal / Germany
S.10/20 (07/2017.01.0)
Tel. +49 (721) 46596 - 0 Fax +49 (721) 46596 - 77
www.camtec-gmbh.com
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(Technical changes and errors reserved. This product may not be used in life support systems.)
Master-Slave Mode (Ureg-OUT/Ireg-OUT)
The CPS-EX 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. 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-EX 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 ±10%.
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. 1,5mA). Alternatively, a voltage of 10 to 30V
(typ. 12V/1.5mA, 24V/5.5mA) can be applied.
If the shutdown repeals the power supply starts with a delay of
35ms.
Using the soft start the current and the voltage rises within
100ms continuously to the default set values. Between control
input SD, power input and power output is a reinforced
Isolation of max. 400Vdc.
