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PSI 9000 2U Series
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
2.3.5.2 Cable lead and plastic cover
A plastic cover for contact protection is included for the DC terminal. It should always be installed. The cover for
type 2 (see picture above) is fixed to the connector itself, for type 1 to the back of the device. Furthermore the
cover for type 1 has break outs so that the supply cable can be laid in various directions.
The connection angle and the required bending radius for the DC cable must be taken into
account when planning the depth of the complete device, especially when installing in a 19”
cabinet or similar. For type 2 connectors only a horizontal lead can be used to allow for instal-
lation of the cover.
Connection examples:
•
Type 1, up or down
•
Space saving in depth
•
No bending radius
•
Type 2, 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 specifications.
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!
