
759
Invert Follow: In an interlock, a second point
(component B) takes on the opposite state as the
triggering point (component A). See Follow.
J
Job Specifications: All the written documentation
that must be followed in order for a job to be
correctly completed.
K
Key Control: In an EAC system, key assignment and
control is managed by the controller.
Keypads: A keyboard device, often, but not always,
limited to numbered keys between 0 to 9.
L
Latching: The manual use of electronic access
control credential in which one credential read
causes a lock to unlock and a second read locks the
lock. The lock changes state only after a credential is
read.
LED: Light Emitting Diode (a small lamp).
Local Relay: The communication occurring between
an input device and an output on a control panel.
Log In: Signing in to the system. When system
operators change shift, the new operator logs in.
Log Out: Signing out of the system. When system
operators change shift, the operator leaving the shift
logs out.
Loop: A communications network wherein the
communications cable begins and ends at the same
point, with control panels linked at increments along
the loop.
Low Voltage: When a battery is too low the N-
1000-III and IV panels can be configured to report a
low voltage alarm.
Glossary
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