Lenze EPM-H502 Instructions De Mise En Service page 68

5 Commissioning
Initial switch−on
5 Commissioning
5.1 Initial switch−on
Commissioning requires a complete wiring of the system bus.
Before switching on the supply voltage, check ...
the complete wiring for completeness and short circuit,
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whether the bus system is terminated at the first and last physical node.
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EDBPM−H502 DE/EN/FR 5.1