ALPHA TECHNOLOGIES FXM 650 UPS, 24VDC Battery Bus. The Alpha FXM uninterruptible power supply (UPS) modules provide clean, reliable power control and management as part of a complete UPS solution. “, sans-serif; font-size: 16px;”>. Full featured ruggedized UPS provides clean, uninterruptible backup power, ensuring your system will remain running during power outages. Wide range Automatic Voltage Regulation (AVR) without going to batteries lengthens battery life, even during periods of surge or sag in the line voltage. External communications via RS-232 port and optional Ethernet SNMP interface provides local or remote monitoring and control. Independently programmable dry contact relays allow tracking and controlling of key functions. A wide operating temperature range of -40 to 74°C (-40 to 165°F) is suitable for the most extreme operating environments. Temperature compensated battery charging protects batteries from over charging at extreme temperatures, extending the life of the battery. White text on blue display improves text readability in bright daylight. “, sans-serif; font-size: 16px; clear: both;”>.