HOME

TheInfoList



OR:

Digital Serial Interface (DSI) is a
protocol Protocol may refer to: Sociology and politics * Protocol (politics) Protocol originally (in Late Middle English, c. 15th century) meant the minutes or logbook taken at a meeting, upon which an agreement was based. The term now commonly refers to ...
for the controlling of lighting in buildings (initially
electrical ballast An electrical ballast is a device placed in series with a load to limit the amount of electric current, current in an electrical network, electrical circuit. A familiar and widely used example is the inductive ballast used in fluorescent lamp ...
s). It was created in 1991 by
Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
n company Tridonic and is based on Manchester-coded 8-bit protocol,
data rate Data rate and data transfer rate can refer to several related and overlapping concepts in communications networks: Achieved rate * Bit rate, the number of bits that are conveyed or processed per unit of time ** Data signaling rate or gross bit rate ...
of 1200
baud In telecommunications and electronics, baud (; symbol: Bd) is a common unit of measurement of symbol rate, which is one of the components that determine the speed of communication over a data channel. It is the unit for symbol rate or modulat ...
, 1 start
bit The bit is the most basic unit of information in computing and digital communication. The name is a portmanteau of binary digit. The bit represents a logical state with one of two possible values. These values are most commonly represented as ...
, 8 data bits (dimming value), 4 stop bits, and is the basis of the more sophisticated protocol
Digital Addressable Lighting Interface Digital Addressable Lighting Interface (DALI) is a trademark for network-based products that control lighting. The underlying technology was established by a consortium of lighting equipment manufacturers as a successor for 1-10 V/ lighting ...
(DALI). The technology uses a single byte to communicate the lighting level (0-255 or 0x00-0xFF). DSI was the first use of digital communication in lighting control, and was the precursor to
DALI Dali or DALI may refer to: Art and popular culture * Dali, a location in ''Final Fantasy IX'' * ''Dali'' (Dalida album) (1984) * ''Dali'' (Ali Project album) (1994) * Espace Dalí, Salvador Dalí's permanent exhibition in France Religion ...
.


Advantages

* Its simple nature makes it straightforward to understand, implement, and diagnose, while its low voltage means it typically runs along relatively thin cables. * Because each device has its own wire to the controller (rather than being part of a
network Network, networking and networked may refer to: Science and technology * Network theory, the study of graphs as a representation of relations between discrete objects * Network science, an academic field that studies complex networks Mathematics ...
) it has no need of an address to be set, so can be replaced simply by unplugging the faulty one and plugging in the new. * It dims to off, so does not require mains switching equipment to turn them off.


Disadvantages

* It requires one wire per control channel so a sophisticated system could have hundreds of wires, thereby making diagnoses of problems difficult. * It is a
proprietary {{Short pages monitor