This emergency power management ESP-500 A was developed for danger alarm devices, which have to be in accordance with the international standard IEC 50849. Any kind of error will be indicated and announced via a signal buzzer, a buzzer or LED. 

Please consider the following features:

• Output-fuse monitoring with notice of malfunction in order to ensure automatic alarm in case of emergency power usage.
• Monitoring of the accumulator connection to signal in case an accumulator is missing or disconnected.
• Acoustic and optical error message directly on the device in addition to the accumulative alert output.
• Charging status display and LED with division into a percentage.
• Protection against polarity reversal and protective circuit against overcharging and excess voltage regarding the charging batteries. 
• Integrated reverse charge protection for 24 V charging batteries (in case the storage battery voltage drops below the given minimum value with regard to DC operation, the automatic DC commutation will be deactivated).
• Two 24 V outputs with each 32 A and three 24 V outputs with each 16 A.