The Lexium 52 requires a mains contactor in order to be able to remove power to the Lexium 52 components. This mains contactor is controlled by the Ready relay output. Here, the mains contactor may operate only if the Ready relay output contact is closed. The Ready chain may comprise additional switches which prevent the mains contactor from responding or cause the contactor to release although the Ready contact is closed , such as may be the case in your functional safety architecture.
The selection of the mains contactor must be in accordance with the protection requirements of the mains line.
For further information, refer to Fusing the Mains Connection.
