HP Procurve 600 RPS P/N: J8168AThe HP E600 Redundant and External Power Supply (RPS EPS) has two different power supplies embedded: one for 12 V and the other one for 50 V. The 12 V power supply is called a redundant power supply (RPS) and the 50 V power supply is called the external power supply (EPS). The RPS has six ports offering redundant power to any one of up to six 2600 switches. The EPS has two ports and can power up to 24 Power over Ethernet (PoE) ports with full 15. 4 W