American access system ADV-1000 Guide de l'utilisateur Page 764

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764 WIN-PAK User Guide
Push Bar: A door-unlatching device. When pushed,
it releases a lock. If the push bar is connected
electronically to the controller, it signals the
controller that an egress event has taken place.
R
RAM: Refers to random access memory used in a
computer or control panel.
Reader: Any device that reads encoded information
from a card or token and transmits the information
to a control panel.
Real Time: Processing events as they happen.
Redundant: Having two or more ways of doing
things. Redundant hardware indicates that two or
more items exist for every single function. The
duplicate hardware can replace failing hardware at a
moment’s notice.
Re-enable: Return the system to normal operation.
Relay: An electronically operated switch that, when
activated by a change in conditions on an electronic
circuit, activates other devices on the same or
another electronic circuit.
REX: Request-to-exit device. Refers to a button,
pushbar or similar device that allows free egress
without setting off an alarm.
RFI: Radio frequency interference.
S
Secure: To arm or enable.
Serial Port: A plug on a computer that is normally
used for communications functions. These functions
include attaching a computer to a modem, or a
computer to communications loops that are connected
to control panels.
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