ABB UniSec Handbuch für Betrieb und Wartung - Seite 12

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U N I S E C D I G I TA L M A N U A L E D I F U N Z I O N A M E N TO E M A N U T E N Z I O N E

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3. Replacement of wireless sensors

and concentrator

• Open the low voltage compartment door.

• Unscrew the fastening screws of both

• Detach the connectors.

• Press upwards to detach the concentrator from

connectors.

the DIN rail.

• Detach the bearing plate from the rear part of

the old concentrator and fasten it to the new

concentrator.

• Fasten the new concentrator to the DIN rail.

• Re-connect the connectors and screw them

onto the concentrator.

• Energize the low voltage circuit.

• Make sure that the "Running" led flashes and

that the "Comm" led is on.

• Consult the MDC4 -M user manual for further

details.