ATEN VM-PWR400 VM1600 Power Module can be equipped with dual power modules to ensure that the system is always working. The power modules are hot-swappable and can be easily replaced without shutting down the system. The VM1600 has two power slots that can connect to two different power supplies. If the primary power fails, the secondary power supply will automatically take over. ATEN ensures that your investment is well protected while delivering outstanding performance.