Description

The internal components can be supplied with 24 V either from the device or via an external 24 V backup voltage.

To supply the 24 V from the device, an internal 24 V switched-mode power supply is required (power section: MPI91A.. and MPI92A..). If an external 24 V backup voltage is applied, SEW-EURODRIVE recommends the device design without an internal 24 V switched-mode power supply (MPI90A..).

When using an internal 24 V switched-mode power supply with simultaneous external connection of a 24 V and 400 V supply, note that the backup current of the external 24 V supply typically only takes over the full load at 26 V. Between 24 V and 26 V, the 24 V sources operate under partial load, depending on the load. If there is no 400 V supply connected to a device with an internal 24 V switched-mode power supply, the external 24 V supply is placed under full load.