PWR-SPLY-9V3A: ENVIROMUX-5D 9V, 3A power supply 

ENVIROMUX-5D features optional dual redundant power supplies for connection to two separate power sources for dual power.

One country-specific AC adapter ships with ENVIROMUX-5D . The second AC adapter (for dual power) is purchased separately.

If the first power source fails, the unit will automatically, without interruption, switch over to the second power source before switching to the optional battery backup.