Comix offers 19" 2U rack mount type of Pure Sine-Wave On-Line UPS For Long Time Backup, with charger allows adding the battery banks (2U) in order to extend the back time. An optional feature the UPS communication port can be upgraded with SNMP DK-801 intelligent card to achieve direct power management via Internet worldwide. Or AS-400 Relay card is used to provide Potential Free Relay Contact Interface for industrial control applications require Dry Contact Signals.