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NCE BD-20 DCC Block detector

NCE BD-20 DCC Block detector

Product Code: 101247
5 / 5   1 review
100% of reviewers would recommend this product to others.
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£14.50
(£12.08 excl. VAT)

NCE Block detector

The BD-20 block detector module is normally used to indicate the presence of a locomotive, Coaches or other rolling stock in a track section by connecting to AIU01 and 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.)

Unlike other detection units the BD-20 requires no direct electrical connection to the track. This block detector can be used with any sized DCC power booster of up to 12 Amps capacity. The track feeder wire for one rail of the block is just passed through the hole in the current transformer on the module (see manual) before connecting the feeder to the track. Sensitivity can optionally be adjusted with the use of a 10k Pot of the correct size (see 910100116). The more times the wire goes through the hole in the current transformer the more sensitive the detector becomes. (See the section on Detector Sensitivity for some limits on this matter.)

An LED is provided if you wish for simple indication of staging track occupancy, progress though a helix, etc. You can also add an external relay to control heavy or high voltage loads.

When properly wired and set up this little nasty does it's job well. It has an LED which lights up when a decoder is connected to the track it is watching. As soon in the equipment manual, this item's sensitivity can be adjusted by running more loops of wire through it but I so far have had no problems with just the stars single loop through. Ensure you have well soldered connections between your feeder wires and the track.Supports an additional LED/Buld feedback system which I intend to use as an output for my manual signalling logic. Unfortunately NCE does not have a signalling device just yet; but the Sig 12 is planned for this year; contact support to confirm.I am on YouTube, search my username to see this device in action!
Neal -
NCE BD-20 DCC Block detector
Product Code:101247
NCE BD-20 DCC Block detector

NCE Block detector

The BD-20 block detector module is normally used to indicate the presence of a locomotive, Coaches or other rolling stock in a track section by connecting to AIU01 and 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.)

Unlike other detection units the BD-20 requires no direct electrical connection to the track. This block detector can be used with any sized DCC power booster of up to 12 Amps capacity. The track feeder wire for one rail of the block is just passed through the hole in the current transformer on the module (see manual) before connecting the feeder to the track. Sensitivity can optionally be adjusted with the use of a 10k Pot of the correct size (see 910100116). The more times the wire goes through the hole in the current transformer the more sensitive the detector becomes. (See the section on Detector Sensitivity for some limits on this matter.)

An LED is provided if you wish for simple indication of staging track occupancy, progress though a helix, etc. You can also add an external relay to control heavy or high voltage loads.

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(£ excluding VAT)