What is a secondary access control system?
In order to prevent the controller out of power caused by the entire system can not work, generally require access control system at least one UPS uninterruptible power supply, access control electric lock this Ayu external power supply to ensure that the access control system in the power-down devices can be normal jobs.
The controller word is powered by + 10 ~ + 24V DC. In general, in order to reduce the impact of the control device power supply interference, should deal with a variety of controllers separate power supply, when the reliability is high, the need for controller and electric lock db power supply.
