To apply power.

A report of an action that takes place within the system, such as a door being opened, a person going through a portal, a time zone being active or the security system being armed.

In card access, a portion of the identifying characteristic of an access credential that is common to a group of users in secured facility.

An electric lock that automatically unlocks with any power interruptions.

An electric lock that requires power to unlock.

A door that has been certified as a fire and smoke barrier. Special rules govern fire doors, including permissible hardware that can be installed.

A relay or switch mechanism that contains three terminals (normally open, common, and normally closed).

A conducting connection between an electrical circuit and the earth or other large conducting body to serve as an electrical ground, thus making a complete electrical circuit.

Compass Intelligent Controller Module

Compass Intelligent Input Module

A device that provides information to a panel so it can make event or alarm decisions.

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.

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.

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).

Compass Intelligent Output Module

Compass Intelligent Reader Module

In access control, usually refers to a numeric input device used to identify a user by PIN (personal identification number).

The locking of a circuit by means of a holding contact; used in relay logic when a momentary initiation is required.

The voltage existing in a main cable or circuit, such as a wall outlet.

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.