Specifications

Glossary
23
RADIA Lighting Control System
Power Consumption Rating - An amount of energy used by a device to perform its function at maximum
load. Radia Lighting devices have power consumption ratings expressed in milliamps (mA). Radia Lighting
controllers provide this power to operate the modules and can also get more power from external power
supplies.
Power Rating - Ratings expressing the maximum load capacity of a module, dimmer, or switch. Radia
Lighting power ratings are based on UL testing and approvals.
Preset - A preset is a stored scene. Presets can consist of a single dimmer or any combination of dimmers as a
group of stored values. Radia Lighting presets allow a dimmer or any combination of dimmers to be excluded
from a preset.
Preset Fade Time - A Radia Lighting default parameter. The amount of time it takes for one preset to begin to
fade out and another preset to completely fade in.
Preset Ramping - The active preset can be ramped to a different level while retaining the proportions and
integrity of the preset scene. A preset can be dimmed so that all levels are zero and recovered or brought to full
brightness and the dimmed back down to the original settings.
PROlink - A four-wire data bus used to transmit and receive data from pack to pack. A PROlink address
designates which six channels of control will be assigned to a pack, up to 10 pack addresses and 60 channels of
control.
Ramp - The increasing or decreasing of a light level on a continuous grade or increment.
Ramp Rate - The time it takes for a dimmer or group of dimmers to go from their present level to full light
level or zero light level via a ramp command, expressed in seconds of time.
If a dimmer is at 50%, then a 5-second ramp rate means it takes 5 seconds to go from 50% to 0, or from
50% to 100%. If a dimmer is at 75%, then a 5-second ramp rate means it takes 5 seconds to go from 75%
to 0, or from 75% to 100%.
Relay - A controlled device that interrupts or connects a circuit.
Satellite Module - Any Radia Lighting dimmer or switch module (RDM- series).
Scene - The condition or status of all dimmers in a designated area or zone. A stored scene is a preset. A preset
recalled and then changed becomes a scene.
Slot - A single space in a Radia Lighting enclosure numbered from left to right starting at #1. This is used to
describe which space in an enclosure a module is located or installed.
Solid State Dimmer - A type of dimmer that uses electronic semiconductors and other solid-state electronic
devices to control the dimming of a lamp or ballast.
Space - An enclosure dimension of 2.75" x 10" capable of installing a Radia Lighting module.
Switch - A device that breaks and connects an electrical circuit.
Three Phase Power - A power system that combines three hot powered leads and one neutral line. Each line
is 120° out of phase with each other. Common building and residential electrical panels provide three phase
power where the potential difference between any phase and neutral is 120 VAC. The Radia Lighting PRO
enclosure accepts three phase power.
Transformers - A device for altering the voltage of an AC supply. Transformers are commonly used to step
down a higher voltage to a lower voltage used by the lamp. Transformers can also be used to step up a voltage
such as a neon transformer that outputs thousands of volts from a 120 VAC feed.
Undefined (level) - A level setting that causes a channel to be excluded from a preset.
Zero Cross - The point where the AC waveform is at zero potential to ground is called the zero cross point.
The zero-cross point is used as a common electrical reference in a dimming circuit and provides a
synchronized reference point for opening or closing a relay. The zero-cross point is determined by the phase of
the line input power and neutral.
Zone - A zone is an area of lighting under independent control. It can be made up of one or more dimmers. A
lighting zone can be one table lamp or an entire corridor. Common usage has one dimmer to one zone, but a
lighting zone can be made up of many dimmers.