User Manual

Page 33
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSI 9000 3U Series
Examples of the type 1 terminal:
• 90° up or down
• space saving in depth
• no bending radius
• horizontal lead
• space saving in height
• large bending radius
2.3.6 Grounding of the DC output
Individually operated devices can always be grounded from the DC minus pole, i.e. can be directly connected to
PE. The DC plus pole, however, if it is to be grounded, may only be so for output voltages up to 400 V, unless
statedotherwiseinthetechnicalspecications.
For this reason, for all models which can provide an output voltage of more than 400 V, earthing of the DC plus
pole is not recommended, because it will shift the potential of the DC minus pole in negative direction, up to the
maximum output voltage. If the output voltage is not adjusted higher than 400 V, grounding the DC plus pole is
allowed with restrictions.
• GroundingoftheDC-pluspoleforanymodelwith>400Vnominalvoltageonlyatone’sown
risk! Risk of damaging the device! Risk of voiding warranty!
• Digital and analog interface are galvanically isolated from the DC output and should never be
grounded, but under no circumstances if any of the DC output poles is grounded too, because
this will cancel the galvanic isolation
• If grounding one of the DC output poles check if any pole of the load is already grounded. This
could lead to a short circuit!
2.3.7 Connecting the “Share” bus
The “Share” bus connector on the back side is intended to balance the current of multiple units in parallel opera-
tion, especially when using the integrated function generator of the master unit. Alternatively, it can be connected
to a compatible electronic load, like from series ELR 9000, in order to run a two-quadrants operation. For further
information about this mode of operation can be found in section „3.9.3. Two quadrant operation (2QO)“ .
For the connection of the share bus the following must be paid attention to:
• Connection is only permitted between compatible devices (see „1.10.10. Share Bus-Connection“
for details) and between a max. of 10 units
• If a two-quadrants operation system has to be set up where multiple power supplies are con-
nected to one electronic load unit or a group of electronic loads, all units should be connected
viaSharebus.OnepowersupplyunitisthenconguredasSharebusmaster,similartotrue
master-slave operation. The group of power supplies may use the master-slave bus for true
master-slave operation, the group of loads may not, because there must be only one master
unit on the Share bus.
2.3.8 Connection of remote sense
In order to compensate, to a certain degree, the voltage loss in a DC cable, the device provides the possibility to
connect the remote sensing input “Sense” to the load. The device recognizes the remote sensing mode automati-
cally and regulates the output voltage (only in CV operation) at the load rather than at its own DC output. In the
technicalspecications(seesection „1.9.3. Specic technical data“) the level of maximum possible compensation
isgiven.Ifthatisinsufcient,thecablecrosssectionmustbeincreased.
Both pins „NC“ of the Sense connector must not be wired!