BN54 – Battery Charger: 13.8V 5A 55W

The BN54 Series is a new generation / smart Power Supply that is designed to provide battery backed-up power in the event of either the PSU or the battery is disconnected or short-circuited.

When the AC supply fails, the battery will automatically be connected and will provide power until the ac supply is restored. If the battery has reached its disconnect voltage, it will automatically be disconnected to prevent deep discharge damage. Designed for powering critical loads with battery back-up, in a wide range of Industrial applications and in particular Security installations and Access Control, with separate Load and Battery Charging circuits. A wide range of Signals, Led’s and Alarms, all aimed at providing the optimum solution for powering critical DC Loads.

An isolated Common Fault relay has been provided which will operate if any fault is found (This is a fail-safe signal so will signal a fault even if no power sources are on/connected.



Input Frequency 47 ~ 63Hz
Input Current 1A
Power Factor 0.42 @ 230Vac and  full load
Output Voltage 13.8V
OVP 105-125% latching. Recycle input after 30 seconds to restart
Short Circuit protection Hiccup mode
Cooling Convection cooled
Load Regulation ±0.75%
Line Regulation ±0.5%
Ripple & Noise 0.5% @ 230Vac , full load ( BW =DC-10Hz)
Battery Output current limited @ 1A
Temp Compensation Connector provided for user to add 100KΏ thermistor  ( β=4400), suitable for standby use
Deep Discharge Protection at 10V ± 0.3V

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