Page 40
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PSI 9000 WR 3U Slave Series
3.7.3 Two quadrants operation (2QO)
3.7.3.1 Overview
The so-called two-quadrants operation, which is based on the source-sink principle, couples a power supply and
an electronic load are via a control signal. It enables the automatic switchover between either the source or the
sink being active. 2QO is also allowed for master-slave systems. A master-slave system built from power supplies
is then considered as one big source and will be handled and controlled as such. The same configuration is doable
with several electronic loads building a big sink. More information about setup, configuration and use of a 2QO
system can be found in the user manuals of the power supply series PS/PSI/PSE 9000 and PSI 9000 WR, as well
as of the electronic load series ELR 9000 or EL 9000 B.
For the operation of two master-slave system in 2QO, being connected via Share bus, the same restriction as with
master-slave operation applies: the max. number of 16 units on the Share bus.
