Solutions – T&A and access control: door entry and restricted access to rooms

T&A and access control: door entry and restricted entry into internal rooms is based on T&A and access control: door entry and restricted access to rooms so we’ll just note the differences here. This situation can be solved in several ways:

If we need several types of exit clockings and the cable lengths permit it:

• The exit TK-2 is placed at the entrance of the restricted-entry room
• The SL-870 terminal is placed in an appropriate location for exit clockings
• Relay output RL2 is used to activate the restricted room’s door strike
• The S2 sensor input is connected to a magnetic reed sensor to ascertain if the door is open or closed. It can be used to switch off the RL2 signal as soon as the door is opened to save energy in case the controller is working from battery power (power cut)
• The S1 sensor input can be used in the same way to switch off RL1 as soon as the entry door is opened

If the SL-870 terminal isn’t a good choice for exit clockings (e.g. only the basic OUT exit clocking is needed), the SL-862 AUX/TK adapter may be used to add one more (of two pssible) TK-type readers to enable entry into the restricted room. TK readers attached to the AUX port via the SL-862 can also generate relay activation and can thus be used for access control – in this case RL2 will be activated if the employee has access rights to the restricted room.

• This configuration has the added benefit of the added length of cable between the controller and the restricted room’s reader (an additional 60m due to the AUX port)
• One TK port of the SL-862 remains unused, so we could add another reader, but this could only be used for T&A since there are no more relay outputs left

The next configuration uses the four channel controller SL-84.

• The TK1 reader is used for the T&A IN clocking and for access control, to activate relay output RL1, which drives the entrance door’s lock
• The TK2 reader is used for OU clockings for T&A
• The TK3 reader is used for granting access to the first restricted room and drives RL3
• The TK4 reader is used for granting access to the second restricted room and drives RL4
• Relay output RL2 isn’t used for opening doors, so it’s free to be used either for driving a jingle system or a random event signal for spot-searches (only makes sense if there’s a security guard present)
• Sensor inputs S1, S3 and S4 can be connected to door sensors on their respective doors in order to switch off the relay outputs as soon as the doors open

SL-84 T&A and access control with door entry and two rooms with limited access]