Installing IRDOT Modules
Power Supply
All our modules can be powered from 12 to 16 Volts AC or DC.A controller accessory output is a suitable power source.The low power consumption of the units "less than 20mA for the IRDOT-1" allows many modules to be powered from the same supply.
Installation of Infrared Detection Modules
Units with built in infrared detection are designed to be screwed to the underside of the baseboard with the infrared emitter and detector located in a hole between sleepers."See diagram." They can also operate on their sides.
It is easiest to install the units after the track is laid.Drill a small pilot hole between the sleepers.Use an 8mm drill bit marked with tape for slightly less than the base board thickness. Drill from underneath the baseboard following the pilot hole.Cut or file the small amount of baseboard material left between the sleepers.Install the unit and then fill the remainder of the hole with modelling material.Blu-Tack will hold the units in place temporarily.Use 1.2mm holes for the self-tapping screws that hold the units permanently in place.
When fitted to Z or N gauge track, the gap between sleepers will be less than the diameter of the infrared detector and emitter.However, the modules work well provided they are adjusted to fit close to the sleepers. This positioning prevents reflections off the sleepers causing detection.
For base boards thicker than 22mm "i.e. the height of the infrared devices", or where there are obstructions, the units can be supplied with the infrared emitter and detector fitted to wire leads up to 400mm "18"" long.
The modules will also operate on their side placed along the track. This requires a total width of 45mm. For thick baseboards and restricted space we can supply units with emitter and decoder fixed to wires up to 18 inches long.
The IRDOT units consist of a printed circuit board measuring 30mm by 88mm. Electronic components are fitted on one side. The infra red emitter and decoder fit on the other side. They extend 22mm above the board and are 3mm diameter + thiuckness of the rubber sleeving.