Trunking system with modular construction consisting of base elements of trunking rail and luminaire insert. Supplementary accessories such as reflectors, specular reflectors and louvres can be added simply and without tools.
The system can be expanded as desired with spotlights, tracks, emergency lighting, socket outlet modules and variable and fixed angle connection elements for the track

• modular system
• all elements within the DUS® product family have been constructed for a system module length of 307 mm and can therefore be combined and positioned within this system as desired
• track with 5x 2.5mm² or 7x 2.5mm² through-wiring as standard, expandable to 10-core
• dimmable luminaire inserts available as standard
• multiple circuits and phase preselection as standard
• vibration-tested product variations for earthquake resistance
• emergency lighting possible
• arrangement as a single luminaire, as a trunking system or as a two-dimensional luminaire configuration with up to 6 rails attached to one system node
• simple-operation rotary catches for quick-fixing of luminaire inserts and reflectors
• rotary catches entirely of metal with colour-accentuated plastic cladding for secure fastening of inserts and reflectors
• mounting and electrical connection of inserts within rails without tools in one working step
• self-supporting rail connection for large distances between suspension points of up to 3.5m
  

Robust rail, luminaire inserts and gear tray of sheet steel, pure white (similar to RAL 9010) |
reflectors of sheet steel or aluminium |
Installing of luminaire inserts and reflectors and electrical connection of inserts in rail is carried out without tools in one step | mechanical locking with simple, easy-to-use rotary catches | rotary catches (for secure fastening of inserts and reflectors in rail) entirely of metal, with colour-accentuated plastic cladding |
Connectors and suspension elements entirely of metal | large intervals between suspension points (to 3.5m) due to robust connector elements

Trunking rail and luminaire inserts wired ready for connection |
Rail with 5-pole or 7-pole terminal block as standard, max. 2.5mm², and through-wiring of 5 x 2.5mm² or 7x 2.5mm² | 5-pole or 7-pole sockets at intervals of 307 mm for electrical connection of inserts |
Luminaire inserts with 3-pole connection system suitable for5-core or 7-core wired rail (HF-DALI and HF-dimming: 3-pole + 2-pole for control signal for connection in 7-core wired rail) | 3-phase preselection is made with moving of contact pin prior to installation in rail | with HFG, HF-DALI or HF-dimmable (1-10V) as standard | further electrical equipment on request |
3-phase track adapter module with 5-pole plug connector as standard for making electrical contact with 5-pole plug connector for connection in trunking rail | for 1 or 2 conventional spotlights with universal track adapter |
Luminaire inserts with emergency lighting function with HFG as standard, with choice of:
- self-contained supply for AC voltage on normal mains or with integral self-contained supply
- changeover relay for AC voltage on normal mains or a second, external power supply (emergency supply)
- without changeover relay for permanent operation with a second, external power supply (emergency supply), or
- with E27 socket for operation with a second, external power supply (emergency supply)

DUS® luminaire inserts with open distribution |
lighting technology can be supplemented with reflectors, specular reflectors and louvres