NCE 5240205 Block Module Detector/DCC, 0.01 to 20A BD20

Block Module Detector/DCC, 0.01 to 20A BD20

Description

The BD-20 block detector module is normally used to indicate the presence of a locomotive, caboose or other rolling stock in a track section by sensing electrical current drawn by that rolling stock. Locomotives will naturally trigger the detector because they draw current through their DCC decoder. Unpowered rolling stock will not trigger the detector unless equipped with some means of drawing current from the rails such as lights or resistor wheel sets.