Ea Elektro Automatik EA Elektro-Automatik 06230319, 1 Output Variable DC Power Supply, , Bench 06230319 Hoja De Datos

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EA Elektro-Automatik GmbH

Helmholtzstr. 31-33 • 41747 Viersen

Germany

Fon: +49 2162 / 3785-0

Fax: +49 2162 / 16230

This way of operating refers to the use of a source, in this case a power supply 

of this series PSI 9000 2U, and a sink, for example a series ELR 9000 electronic 

load. The source and the sink function alternately in order to test a device, such 

as a battery, by deliberate charging and discharging as part of a functional or 

final test
The user can decide whether the system is operated manually or the power 

supply only as the dominant unit or both devices should be controlled by PC. 

We recommend to focous on the power supply, which is intended to control the 

load’s behaviour regarding voltage and current via the Share Bus connection.
Two quadrant operation is only suitable for constant voltage operation (CV).

Clarification:

I

II

III

IV

A combination of source and sink can only map the quadrants 

I + II. This means that only positive voltages are possible. The 

positive current is generated by the source or application and 

the negative current flows into the load..
The maximum approved limits for the application should be set 

in the power supply. This can be done via the interface. The 

electronic load should preferably be in operating mode CV. The 

load will then, using the Share Bus, control the output voltage 

of the power supply.
Typical applications:
•

Fuel cells

•

Capacitor tests

•

Motor driven applications

•

Electronic tests where a high dynamic discharge is required. 

3.10.3.2  Connecting devices to a 2QO
There are a number of possibilities to connect source(s) and sink(s) to make a 2QO:

Configuration A:
1 e-load and 1 power supply, plus 1 test object (E.U.T).
This is he most common configuration for 2QO. 
The nominal values for U and I of the two devices should 

match, but at least the voltage. For example, an ELR 9080-

170 and PSI 9080-120 2U would match. The system is con-

trolled by the power supply unit, which has to be set to be 

“Master” in the setup menu, even though there is no master-

slave operation running.

Configuration B:
1 e-load and multiple power supplies, plus 1 test object 

(E.U.T).
For adapting the total power of the power supply device to 

the possibly higher input power of the load, the power sup-

plies are connected via Master-Slave and the load’s current is 

shared across the power supplies when wiring the Share bus 

to gain a balanced load distribution. The digital master-slave 

bus can be wired if installed on the power supply units. One 

PSU, preferable PSU 1, has to be set to Master for the Share 

bus connection, no matter if MS operation via the digital MS 

bus used or not.