Elster EK280 - Connecting the Power Supply

Assembly, Connection and Putting into Operation 41
5.2.5 Connecting the power supply
5.2.5.1 Power supply for the EK280 without integrated power supply
unit
DANGER!
The connection of non-associated equipment presents a
risk of explosion!
Operating the EK280 in zone 1 and connecting devices
which are not certified as "associated equipment" present a
risk of explosion.
Therefore:
– When using the EK280 in zone 1, it should only be con-
nected to certified associated equipment as per the ATEX
Product Directive 94/9/EC.
– The EK280 should only be connected to the intrinsically-
safe circuits of associated equipment whose electrical da-
ta corresponds to those requirements stipulated in the
declaration of conformity for the EK280 (see Appendix).
For the external power supply of the EK280 (model without in-built power
supply unit), the electrical data should be adhered to as per chapters 9.3
and 3.2.3.
The extended function unit "FE260" from Elster can also be used as a
power supply unit, for example.
Fig. 16
Connect the power supply to the "Uext"
terminal ( 1 ) of the EK280.
The polarity should be taken into con-
sideration, i.e. connect the "+" of the
power supply unit to the "Uext +" termi-
nal and "-" to "Uext".
i1i
1