DC 24 V supply
The internal components can be supplied with DC 24 V either from the device or via an external DC 24 V backup voltage.
For the DC 24 V supply via the device, an internal 24 V switched-mode power supply is required (MPI91A.. and MPI92A..). If an external DC 24 V backup voltage is applied, SEW-EURODRIVE recommends the device design without an internal 24 V switched-mode power supply (MPI90A..).