Integrated Technical Vision Ltd.
28
Terms
Identifiers
In access control systems each user has a unique RF ID. Identifiers can take the form
of a plastic card, key FOB etc.
Reader
The information on the identifiers is read with READERS, connected to the ACS
control panel. There are several types of RF IDs and readers for them. It is essential
that reader and control panel use the same interface. Only U-Prox SL series readers
may be connected to the U-Prox CLC control panel.
PIN (Personal Identification Number)
Some readers have built-in keypad. Keypads may be used for PIN entering. It can be
both self-dependent or used as an additional code to user RF ID. When PIN is
programmed as additional code, reader waits for PIN entering after RF ID is read-out.
Access point
Access point is a logical concept of the access control system implying control of
passing through a door in one direction. It consists of reader, access control panel (or
its part), door supervision devices (like door contact, REX button etc.) and door locking
device. For instance, the turnstile with two-way passes has two Access points
– one
for entrance and the other one for exit, door of this type is called double-sided door. A
door with a reader on one side has only one Access point
– Entry point, and it is called
single-sided door.
Direction of passage
Passageway - is a logical unit of ACS, controlling passage through the access point
in one direction. It includes reader, access control panel (or part of access control
panel), actuator. So, tourniquet with double-sided control has two passageways, and
the door, having single-sided reader - only one passageway. Access point, which
consists of two passageways, is called double-sided, and the point of access, which
consists of one direction of passage - single- sided.
REX (request to exit)
To exit from the premises with a single-sided door, a button wired to control panel is
used. This button is called REX (request to exit) button. If someone opens a door
otherwise than pressing REX button
– by re-energizing locking device, opening lock
with a key etc., "Door Forced Open" event arises. REX button may be used for remote
door opening as well.
Door Contact
A properly designed ACS has to supervise door status (opened or closed): magnetic
door sensor, sensor of the turnstile rotor position, inductive sensor of the road barrier,
etc. This ensures that the system prevents situations when several users access the
door with one RF ID or the door is
left open after user’s access and so on.
For these purposes the magnetic door sensor, the turnstile rotor position sensor and
the position sensor of boom barrier are connected to the input of panel. The input
used to connect the sensors, is called the input of the door contact.
Antipassback
Antipassback function is implemented in access control panels to prevent the situation
when user gives his RF ID to another person after passing into the premises. If this
