Glossary

Term	Description
Input	A device that provides information to a panel so it can make event or alarm decisions.
Input Supervision	Detects if someone has tried to tamper with sensors/locks. These attempts can be detected by sensing multiple voltage levels at the door position switch. Inputs can be configured in up to 4 states. 2 state devices are like a light switch. On or off. 3 State devices with a resistor in series can determine whether an input is active, inactive, or not short circuited. 3 state devices with a resistor in parallel can determine whether an input is active, inactive, or the circuit is not open. 4 state devices have both parallel and series resistors and determine whether an input is active, inactive, and the wiring is open or shorted.
Inrush	The initial surge of current through a load when power is first applied. Lamp loads, inductive motors, solenoids, and capacitive loads all have inrush or surge current. Resistive loads, such as heater elements, have no inrush.
Interlock	A system of multiple doors with controlled interaction. Interlocks are also known as light- traps, air-traps, man-traps, and sally-ports (see security interlock).
IOM	Compass Intelligent Output Module
IRM	Compass Intelligent Reader Module
Keypad	In access control, usually refers to a numeric input device used to identify a user by PIN (personal identification number).
Latch	The locking of a circuit by means of a holding contact; used in relay logic when a momentary initiation is required.
Line voltage	The voltage existing in a main cable or circuit, such as a wall outlet.
Lmhosts	The Lmhosts file is a local text file that maps Internet Protocol (IP) addresses to NetBIOS names of remote servers with which you want to communicate over the TCP/IP protocol
Lmhosts File	The Lmhosts file is a local text file that maps Internet Protocol (IP) addresses to NetBIOS names of remote servers with which you want to communicate over the TCP/IP protocol
LSS	Lock Status Switch: A switch in the locking device that provides the system feedback whether or not the device is locked or unlocked.
National Electrical Code (NEC)	A consensus standard published by the National Fire Protection Association (NFPA); commonly called "code".
NetBIOS	NetBIOS is an acronym for Network Basic Input/Output System. It provides services related to the session layer of the OSI model allowing applications on separate computers to communicate over a local area network.
Noise	The unwanted and/or unintelligible signals picked up on a cable circuit.
Normally Closed (NC)	The condition or position of contact prior to initiation or energizing, in this case, a closed condition.
Normally open (NO)	The condition or position of contact prior to initiation or energizing, in this case, an open condition.
Ohm	The unit of measurement of resistance.
OPC	A software interface standard that allows Windows programs to communicate with industrial hardware devices. OPC = OLE for Process Control
Operator	A person who is able to operate within the Intelli-Site software. Examples of some of the items an operator may be able to do: configure devices, generate reports, view and acknowledge alarm conditions, manage card holders, assign access rights, and issue badges.