6
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. U-Prox IP400 use Wiegand
interface.
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 (AP)
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, RTE 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.
RTE (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 RTE (request to exit) button. If someone opens a door
otherwise than pressing RTE button
– by re-energizing locking device, opening lock
with a key etc., "Door Forced Open" event arises. RTE button may be used for
remote door opening as well.
Door contact
Properly designed ACS is used to supervise door status (opened or closed), such as
magnetic door sensor, sensor of the turnstile rotor position, inductive sensor of the
road barrier, etc.