AMX RDA-ENC2 Instruction Manual page 28

Glossary
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.
24 Radia Lighting Control System