Description - WAGO I/O SYSTEM 750 750-641 Manual

2.1.1.2 Description

The DALI/DSI Master Module 750-641 enables actuators used in lighting
applications (e.g. electronic ballasts for the building automation) to be
controlled digitally. This module is a substitute for an analog 1-10 V dimmer
interface used currently.
DALI (Digital Adressable Lighting Interface) is a protocol used by
manufacturers for standardized control of electronic ballasts in lighting
applications (DIN IEC 60929). With DALI complex lighting scenes and group
functionalities can be realized. Beyond that, using the DALI/DSI Master
Module within the WAGO-I/O-SYSTEM allows for any combinations of
DALI controls with other building services.
DSI (Digital Serial Interface) is a proprietary interface developed by the
TRIDONIC ATCO company and as a 1-10 V dimmer interface in digitally
function it is also used to control electronic ballasts.
However, compared to the DALI master, the slaves of the DSI module cannot
be addressed individually and no feedback signals can be sent to the master.
The module has two parallel connections each for the +DALI and the –DALI
bus connection. These connections allow, for example, the wiring of up to 64
DALI slaves directly via one bus line or two parallel bus lines using 2-
connectors. The module is supplied DC 18 V and common (ground)
connections.
Warning
The WAGO DC/DC Converter, Item-No.: 288-895, must be used when
providing the module with DALI and DSI compliant 18 V supply. The
converter guarantees the electrical isolation between the DALI bus and the
internal data bus, which is required when using 230V consumer loads.
Attention
The WAGO DC/DC Converter, Item-No.: 288-895, delivers up to 400mA
and can supply three DALI modules in full extension, that means each
module is wired with a maximum of 64 electronic ballasts à 2mA  130mA.
As far as the wiring of the converter and the topology are concerned, please
refer to the chapter "Installation Notes".
Warning
The DALI/DSI Master Module 750-641 is not protected from arbitrary
exchanging of the connecting cables.
Up to 64 DALI slaves can be installed. Each slave can be assigned to 16
individual groups or 16 individual scenes. Addressing, allocating and
parameter changes to the slaves are done using an IEC 61131-3 application.
This application accesses both the implemented DALI standard command sets
according to DIN IEC 60929 and an extended command set (Extended
Commands).
The IEC 61131-3 application can be implemented in the connected
programmable fieldbus controller (PFC) of the fieldbus node using the
WAGO-I/O-SYSTEM 750
I/O Modules
750-641 [DALI/DSI Master Module] • 11
Description