A buffer PSU is intended for uninterrupted supply to devices that require stabilised voltage of 24V DC (+/-15%). The PSU provides voltage of U=27,6V DC with output current of I=1,5A + 0,3A for battery charge. In case of power decay, a battery back-up is activated immediately. The PSU is constructed based on the switch mode PSU, with high energy efficiency. The PSU is housed in a metal enclosure (colour RAL 9003) which can accommodate two 7Ah/12V batteries. A micro switch indicates door opening (front cover). Power supply: 176÷264VAC/50Hz. Power supply output: 1,5A/27,6VDC. Battery charging current: 0,3Amp. Fitting battery: 2x7Ah/12V. Efficiency: 77%. Protections: SCP, OVP, OLP, UVP, tamper (opening of the enclosure). Dimensions: W=280, H=292, D+D1=82+8 [+/- 2mm]. Notes: surface mounted enclosure, locking – bolted (lock assembly possible).