Switch mode buffer power supply unit (with a transformer) EN54/LCD series. Dimensions: 420 x 420 x 102 mm, Input: 230V AC (-15%/+10%), Output: 4,0A / 27,6VDC - for continuous operation, 5,0A / 27,6VDC - for intermittent operation, tamper: 1xNC anti-sabotage protection. Space for battery 12V SLA ( 2x17Ah ), battery protection (UVP). Technical outputs: EPS (AC network failure), PSU (power supply failure) and APS (battery failure). Compliant with EN54-4 for fire alarm systems.