Internal-to-External Power Supply Transfer

This section describes the conditions that would cause the Summit X450e-48p or X250e-48p switch to draw power from the external power unit.

Internal Power Supply Failure with Single EPS-600LS Module

When an EPS-C with a single EPS-600LS is connected to the Summit X450e-48p or X250e-48p switch and the internal power supply fails, power is drawn from the EPS-600LS without power interruption to the PoE (Power over Ethernet)-connected devices.

Two or Three EPS-600LS Modules

When the Summit X450e-48p or X250e-48p switch detects that an EPS-C is connected and providing stable power from two or three EPS-600LS power modules, the PoE power budget is automatically recalculated to enable 740 W of PoE power. The internal power supply is disabled to prevent damage from excessive current demands beyond the capabilities of the internal power supply.