Time and attendance and access control into a building usually has the following features:
- The IN reader has the function of activating the door strike for a few seconds and letting the employee in
- The IN reader usually has to be weatherproof unless there is adequate protection against rain and snow
- The IN reader generates the IN clocking for the T&A
- The OUT reader generates the OUT clocking for the T&A and can generate a signal to open the door strike but this is not necessary as egress should be allowed by the door handle
- The free relay output can be used for random events or for a jingle system
SL-83 T&A and access control for front door
- The optional use of the AUX port is shown for the SL-870 terminal (in case other activities such as official exit, field work, lunch break etc are needed) and the large LED clock display.
- iButton readers are shown, but the concept is the same with RF readers (e.g. SL-8471 for the external reader and SL-8472 for the internal one
- It’s recommended to put a non-rotating doorknob on the outside and a handle that can open the door on the inside
- In case there’s a door-phone system installed, a visitor can ask for the door to be opened. If the door-phone system has its own voltage output to open the door, these two outputs (door-phone and SL-83) can be joined with the 2V1LOCK device. If the door-phone system can’t open the door, an egress input of the SL-83 can be used, by connecting a push-button to it, to enable a receptionist to open the via the SL-83’s relay output
- If we have two similar entrances that are relatively close to each other (e.g. so that we can place the controller in the middle and have all reader cables under 20m), one four channel SL-84 can be used instead of two SL-83s