Heathcote Electronics IRDASC4 3 Aspect Signal Control Module
The IRDASC-4 combines block control of signals with built in infra red detection. As a train passes a signal that signal will change to red and each following IRDASC 4 will set its signal to the appropriate aspect ie yellow and green. An LED fixed to the circuit board indicates the operation of the infra red detection for set up purposes. The IRDASC-4 is available in 2,3,and 4 aspect versions, these may be combined together when an oval is wired. For three aspect signalling at least three IRDASC4s are required (with 2 IRDASC4s only red and yellow would be indicated). When less signals are used or the line does not form a continuous oval a MAS Sequencer 4 is used to operate the last signal in the chain with the IRDASC 4s operating the other signals. For a full instruction sheet please go to our downloads tab.
Optional extended wiring is available from the drop down menu opposite. This extends the IR detectors by approx. 18 inches.