Grounding Of The Dc Input; Connecting The "Share" Bus - Elektro-Automatik EL 9000 B Slave serie Betriebsanleitung

Examples of the type 1 terminal:
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2.3.5

Grounding of the DC input

The device can always be grounded on 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 input voltages up to 400 V, because the potential of the minus
pole is shifted into negative direction by the value of the input voltage. Also see technical specification sheets in
1.8.2, item "Insulation".
For this reason, for all models which can support an input voltage higher than 400 V grounding of the DC plus
pole is not allowed.
• Do not ground the DC plus pole on any model with >400 V nominal voltage
• If grounding one of the input poles ensure that no output pole of the source (e.g. power supply)
is grounded. This could lead to a short-circuit!
2.3.6

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 power supply, like from series PSI 9000 3U, in order to run a two-quadrants operation. For further
information about this mode of operation can be found in section „3.7.3. Two quadrants operation (2QO)" .
For the connection of the share bus the following must be paid attention to:
• Connection is only permitted between up to 16 units and only between compatible devices as
listed in section „1.9.6. "Share" connector"
• 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.
• When not using one or several units of a system configured with Share bus, because less power
is required for an application, it is recommended to disconnect the unit's from the Share bus,
because even when not powered they can have a negative impact on the control signal on the
bus due to their impedance. Disconnection can be done by simply unplugging them from the
bus or using switches.
• The Share bus is referenced to DC minus. When grounding DC plus, the DC minus will shift its
potential and so will the Share bus
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
• horizontal lead
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• large bending radius
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
EL 9000 B Slave Series
www.elektroautomatik.de
ea1974@elektroautomatik.de
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