Digital Serial Interface

Short description: Protocol for the controlling of lighting in building

Digital Serial Interface (DSI) is a protocol for the controlling of lighting in buildings (initially electrical ballasts). It was created in 1991 by Austrian company Tridonic and is based on Manchester-coded 8-bit protocol, data rate of 1200 baud, 1 start bit, 8 data bits (dimming value), 4 stop bits, and is the basis of the more sophisticated protocol Digital Addressable Lighting Interface (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.

## Contents

* 1 Advantages
* 2 Disadvantages
* 3 Rival protocols
* 3.1 0-10V analog
* 3.2 ACN
* 3.3 DALI
* 3.4 DMX
* 4 See also

## 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) 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 standard initially exclusive to Tridonic and mainly brands of Tridonic's parent company Zumtobel.

## Rival protocols

### 0-10V analog

### ACN

Main page: Architecture for Control Networks

ACN is an ANSI standard protocol adopted by the entertainment industry. It is based on Ethernet and is typically used as the backbone communication between controllers and control segments. To date few fixtures offer native ACN interface. Typically ACN is converted to DMX interface with strings of fixtures.

### DALI

Main page: Earth:Digital Addressable Lighting Interface

DALI is an open standard for digital control of lighting. Several companies have adopted the DALI protocol in their product offerings. Even though DALI is an open standard, there are already versions of its implementation emerging in different lighting manufacturers products as they strive to provide a point of difference. DSI is essentially the same technology as DALI in terms of messaging, however, DSI eliminates the individual addressing aspect of each light fitting found in DALI.

### DMX

Main page: DMX512

DMX is an ANSI standard protocol adopted by the entertainment industry worldwide which is also being offered on many architectural fixtures. DMX is built on ANSI standard RS-485 serial interface.

## See also

* Dimmer
* Lighting control console
* Lighting control system

* v
* t
* e

Automation protocols

Process automation|

* AS-i
* BSAP
* CC-Link Industrial Networks
* CIP
* CAN bus
* CANopen
* DeviceNet
* ControlNet
* DF-1
* DirectNET
* EtherCAT
* Ethernet Global Data (EGD)
* Ethernet Powerlink
* EtherNet/IP
* Factory Instrumentation Protocol
* FINS
* FOUNDATION fieldbus
* H1
* HSE
* GE SRTP
* HART Protocol
* Honeywell SDS
* HostLink
* INTERBUS
* IO-Link
* MECHATROLINK
* MelsecNet
* Modbus
* Optomux
* PieP
* Ethernet Powerlink
* Profibus
* PROFINET IO
* RAPIEnet
* SERCOS interface
* SERCOS III
* Sinec H1
* SynqNet
* TTEthernet

Industrial control system|

* MTConnect
* OPC DA
* OPC HDA
* OPC UA

Building automation|

* 1-Wire
* BACnet
* C-Bus
* CEBus
* DALI
* DSI
* DyNet
* Factory Instrumentation Protocol
* KNX
* LonTalk
* Modbus
* oBIX
* VSCP
* X10
* xAP
* xPL
* ZigBee

Power-system automation|

* IEC 60870
* IEC 60870-5
* IEC 60870-6
* DNP3
* Factory Instrumentation Protocol
* IEC 61850
* IEC 62351
* Modbus
* Profibus

Automatic meter reading|

* ANSI C12.18
* IEC 61107
* DLMS/IEC 62056
* M-Bus
* Modbus
* ZigBee

Automobile / Vehicle|

* AFDX
* ARINC 429
* CAN bus
* ARINC 825
* SAE J1939
* NMEA 2000
* FMS
* Factory Instrumentation Protocol
* FlexRay
* IEBus
* J1587
* J1708
* Keyword Protocol 2000
* Unified Diagnostic Services
* LIN
* MOST
* VAN
* UAVCAN

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