Systems can be programmed to allow certain users to enter specific areas only at designated times. Other users can be allowed to enter all locations at all times.
Systems can automatically lock a door or gate each evening at a certain time and unlock it at another time. They can also be automatically interfaced with other Building Control Systems e.g. To release some or all doors in the event of a Fire Alarm Activation.
Managing keys can be a nightmare. If you use a different key for every door it can be cumbersome to carry them and time consuming to look for the right key. Keys are easily lost or duplicated and past employees often do not return keys. Access control systems eliminate this concern by deleting the card from the system to deny the former user access. In some cases that access can be changed from an off-site location.
Keys are also anonymous. Access Control Systems create a detailed audit trail so you know exactly whose card opened each door and when. This can provide you with critical information before and after an incident.