5-pole electrical connection a) Three-phase operation Use of the 3-phase system allows TRUNK to be installed in very long uninterrupted lines, making it an ideal solution for large buildings. The 3-phase system, by utilising the third phase as a control line, also allows for any number of individual luminaires to be switched off during periods of inactivity while some remain switched on to provide a required minimum illumination. b) Two-phase operation + emergency lighting When using only two phases, it is possible to use the spare phase conductor for other things such as emergency lighting.
7-pole electrical connection This variant offers all of the above-mentioned advantages in addition to the possibility of including lighting control (LMS). 7-pole connection is necessary for installation in lighting systems determined for the following uses: a) Three-phase operation + LMS Further to allowing for continuous connection in long uninterrupted lines and basic switching control, the extra connectors can be used for connection of dimmable electronic control gears. b) Two-phase operation + emergency lighting + LMS 7-pole wiring enables the implementation of emergency lighting while still offering free connectors for dimmable electronic control gears.
9-pole electrical connection 9-pole connection allows for almost unlimited inclusion of other systems in addition to standard operation, emergency lighting and an LMS. 9-pole connection is necessary for installation in lighting systems determined for the following uses: a) Three-phase operation + emergency lighting + LMS Allows for full three-phase operation in addition to connection for emergency lighting and an LMS. In the case of DALI control, this broadens control possibilities. b) Two-phase operation + emergency lighting + emergency lighting /loud speaker system / other separated phase circuit The additional two connectors can be used for connection of a wide range of other circuits such as a second, independent emergency lighting system, the feeding of load speakers (which can be included in the TRUNK SYSTEM), or any other separated phase circuit.