Glossary of Terms

2-wire switch

These products don't require a neutral connection.


3-wire switch

These products require a neutral connection.


Absence detection

Requires a user to manually switch lights on. Occupancy sensors switch lights off when the room is empty.
See also: Presence and Absence Detection Explained.


BIM (Building Information Modelling)

BIM describes the process of designing a building collaboratively using one digital system rather than as separate sets of drawings. View more information on our BIM Object Downloads.


BMS (Building Management System)

A system that controls and monitors a building's mechanical and electrical equipment.


Corridor hold

In a building, when lights are on in a room, the corridors lights are held on to allow for safe exit or movement around the building. Feature available on Vitesse Plus, An-10 and RAPID.


Daylight harvesting

Lights are dimmed up or down in respond to ambient levels of daylight to maintain a set light level as specified by the designer to meet the relevant standards required. Daylight harvesting is also known as 'Maintained illuminance' and 'Daylight monitoring'.


Energy measurement

Our patented Energy Measurement Technology provides actual energy usage data for all luminaires connected to the system. Energy Measurement allows for comprehensive metering of building wide lighting energy costs. Using a web based reporting suite reportable information is accessible via the front end PC or remotely.


Emergency monitoring

Emergency lamps and ballasts are tested every few minutes to ensure presence, communications and detection of lamp failure.

Flexible test scheduling feature available on RAPID via graphical interface.


Graduated dimming

The lighting within a space dims progressively from the source of natural illuminance in response to changes in natural light levels. Feature available on Vitesse Plus and RAPID.
View more information on Graduated dimming.


HVAC

Heating, Ventilation & Air Conditioning.


IP Ratings

IP40: Protected from tools and small wires greater than 1mm. Not protected from liquids.
IP54: Protected from limited dust ingress. Protected from water spray from any direction.
IP55: Protected from limited dust ingress. Protected from low pressure water jets from any direction.
IP65: Protected from total dust ingress. Protected from low pressure water jets from any direction.
IP66: Protected from total dust ingress. Protected from high pressure water jets from any direction.


LUX level sensing

LUX level sensing detectors only turn lights on when natural light falls below a pre-set level.
See also: Switching Detectors with LUX Level Sensing and Direct Dimming Detectors with LUX Level Sensing.


LUX level switching

LUX level sensing detectors only turn lights on when natural light falls below a pre-set level. Also known as 'switching with LUX level sensing'.
See also: Switching Detectors with LUX Level Sensing and Direct Dimming Detectors with LUX Level Sensing.


Microwave presence detectors

Microwave detectors emit high-frequency electro-magnetic waves. Any change in the receiving echo triggers the detector.


Motion detector

A motion detector is a device that detects moving objects, particularly people. Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area. They form a vital component of security, automated lighting control, home control, energy efficiency, and other useful systems. Motion detectors are also known as 'presence detectors'.

Wikipedia


Neon (permanent)

A permanent neon allows a switch to be easily located in the dark.


Neon (temporary)

A temporary neon indicator shows when the timer is running.


Notional corridors

Corridors of light, keeping working staff safe and secure whilst providing significant energy savings compared to illuminating an entire large open plan office for example. Feature available on Vitesse Plus and RAPID.


Occupancy sensor

An occupancy sensor is an indoor motion detecting devices used to detect the presence of a person to automatically control lights or temperature or ventilation systems. The sensors use infrared, ultrasonic, microwave, or other technology. The term encompasses devices as different as PIR sensors, hotel room keycard locks and smart meters. Occupancy sensors are typically used to save energy, provide automatic control, and comply with building codes. Occupancy sensors are also known as 'presence detectors'.

Wikipedia


Passive infrared sensor

A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.

Wikipedia


PIR presence detectors

PIR presence detectors work by detecting the movement of body heat. The 'switching' occurs due to an infrared signature being registered as differing from one point to another.
See also: Presence and Absence Detection Explained.


Remote monitoring

Monitoring systems from a remote device, not in the building. Feature available on RAPID.


Scene setting

Scene selection allows the recall of pre-programmed lighting levels to create different moods or to suit different uses within an environment. Feature available on Vitesse Plus, An-10 and RAPID.


Slave switch (timers)

Slave push button switches allow one timer to be controlled from a number of locations. Also known as a 'bell switch'.


SELV switching

Safety extra low voltage. A low voltage current runs between a switch and luminare / system. This reduces the risk of shocks.


Step down illuminance

Luminaires are switched down to a lower illuminance when the room isn't occupied.


Switching or dimming

The detector or system has the ability to switch or dim the luminaires. Switching detectors simply presents lighting in an 'off' state or an 'on' state. Dimming differs by changing the light output of a specific luminaire or array of luminaires.


Switch detection time

If a switch is activated and no movement is detected the lights will switch off after a pre-set time, minimising unnecessary lit space.
See also: Presence and Absence Detection Explained.


Timeout or Time delay function

The period of time set on a sensor that holds lights on after the last movement is detected.


User remote control

Pre-program light levels to recall at anytime or use simply to operate lights on/off.


Volt free contacts

The output channel comprises a mains voltage relay capable of on/off switching. The unit provides an isolated voltage free contact output.


Walk towards / walk across

The difference in detection range when walking towards or across the sensing area (sectors) of a PIR detector.
View more information on Walk towards / walk across.