Specifications

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5502DAL C-Bus DALI Gateway Programming Guide

1.2 Definitions

The following deﬁnitions are useful in discussing the DALI Gateway:

Ter m Deﬁnition

C-Bus Load Any device connected to an electric circuit

that consumes power controlled by a C-Bus

Output Unit (examples are lights and electric

motors).

C-Bus Output Unit A device, such as a relay or dimmer, that

directly controls electric loads.

C-Bus Input Unit A device used to control loads (examples

are key switches and passive infrared motion

detectors).

Fade Rate The time taken for a load to reach a certain

level. Fade rate generally refers to light

dimming.

Zones Areas within a ﬂoor space may be divided up

into zones.

Scene A combination of loads to be controlled.

Scenes may be relevant to zones and

incorporate fade rates.

Application Address C-Bus may be used for different uses or

applications. Application addressing is a

method to allow this.

Unit Address Every C-Bus unit has a unique identity called

a unit address. Each unit has an individual

address so that the unit can be speciﬁed for

various actions.

Short Address An address used in DALI systems. Used in a

manner similar to C-Bus Unit Addresses.

Group Address Group addresses are identiﬁers that are

programmed into C-Bus units to create

associations between C-Bus input units

and C-Bus output units, to control loads

connected to the output units.

Table 2. Terms and definitions

Note: This document makes use of hexadecimal numbers that are preﬁxed by a

dollar sign and followed by the decimal equivalent. For example, if we refer to the

Hexadecimal Group Address 42, this is the same as decimal Group Address 66,

and is written as $42 (66).

23446_F2255-01 5502DAL C-Bus DALI Gateway APPROVED.indd 4 30/08/2011 10:38:17 AM