Videx 521B Power supply

Description

The power supply Art.521B is a 240Vac mains input and has two outputs: 13,5 Vdc (between the terminals) normally used to supply the front panels and 13.5 Vac (between the terminals ) specifically for electric locks. To maintain power of the 13,5 Vdc output in case of mains failure, a back-up rechargeable battery (between the terminals ). This battery should be a 12Amp hour 12v SLA type. A link is fitted between the terminals . by removing this link a switch can be fitted between these terminals to turn on and off the output 13.5 Vdc. In case of mains failure, the back-up battery starts working to keep the output 13.Vdc constant. The standby period of the battery varies according to the type used and to the load connected to this unit. When the power of the battery decreases more than 15% in its nominal value (battery discharged), the logic controller deactivates the 13.5Vdc output automatically (to avoid battery depletion).