Dallee Electronics 553 OPTO-DT Infra-Red Optical Detection

Optical detection without interference from ambient light is possible with our OPTODT. Use our single input OPTODT1 to sense any given area using line of sight for 6 feet or more (align diagonally to the track) or use our OPTODT3 to obtain detection with one, two, or three input detector pairs. Both units offer a single block type detection output, utilizing a 5 ampere double pole double throw relay and an expansion connector for a second relay (Item #555), with the timing features offered like our TRAKDTT (Item #565) all included in one unit. The OPTODT detection is for those requiring line of sight without current detection as our TRAKDT family of detectors.

The OPTO-DT1 (Item 552) is a detection device in which the output relay (Double Pole Double Throw) is activated when the optical path of an infra-red beam is interrupted. The OPTO-DT3 (Item 553) version allows up to three separate infra-red beams activating the same relay.

The infra-red beam is generated by an input set consisting of an emitter (looks like a clear LED) and a detector (looks like a black LED). The emitter and detector are mounted on the layout so as to establish a line of sight beam across an area where detection is desired. The emitter and detector can be separated by more than 6 feet but must be precisely aligned. To assist in this alignment, there is an LED on the OPTO-DT which illuminates when proper adjustment is achieved. The OPTODT3 unit, with multiple inputs, has switches so that each emitter/detector set can be independently aligned. If a hood or shield is placed on the detector, the range of the infra-red beam can be extended substantially. The actual distance will depend on conditions within your layout area and on how precisely you are able to align the emitter/detector set. With careful alignment, distances of 15 to 20 feet or more are usually obtainable.