Dell Unity™ All Flash and Unity Hybrid Hardware Information Guide

Power supply and cooling module functions and features

The power supply/cooling modules are located to the left and right of the LCCs. The units integrate independent power supply and two dual-blower cooling assemblies into a single module.

Each power supply is an auto-ranging, power-factor-corrected, multi-output, offline converter with its own line cord. Each supply supports a fully configured DAE and shares load currents with the other supply. The drives and LCCs have individual soft-start switches that protect the disk drives and LCCs if they are installed while the disk enclosure is powered up. The enclosure cooling system includes two dual-blower modules.

Power supply and cooling module connectors and LEDs

Figure 1 shows an example of a 2U, 25-drive DAE AC power supply/cooling module with a power in (recessed) connector (plug) and status LEDs.

Table 1. 2U, 25 (2.5-inch) DAE descriptions

Location	Description	Location	Description
	Ejector latch handle		Power supply/cooling module fault LED
	AC power LED (input)		Grounding screw
	DC power LED (output)		LCC B AC power supply power in (recessed plug)