Description
The Circuitron 5502 BD-2 Current Sensing Block Occupancy Detector is a current-sensing block-occupancy detector — provides a Red / Green signal output for a single isolated block of track.
What it does: Detects the current drawn by a locomotive or any lighted piece of rolling stock in an isolated block. Drives Red / Green LEDs (for 2-aspect signals) directly. Works with common-rail wired AC or DC track power and with most Command Control (DCC) systems. State-of-the-art IC design for high sensitivity and reliability.
- Detection method: Current sensing (no track interruption)
- Output: 2-color (Red / Green) signal drivers
- Track power: Common-rail AC / DC / DCC
- Detects: Locomotives + any lighted rolling stock
- Circuitron SKU: 5502 (Walthers 800-5502)
Tip: For trailing freight cars without lights, add a resistor wheel-set per car to keep the block flagged as occupied even when the loco has left.
About Circuitron: A USA-made model-railroad electronics specialist (Maryville, Illinois) founded in the 1970s. Famous for the industry-standard Tortoise slow-motion under-table switch machine and its surface-mount cousin the SMAIL. The full range covers detection (block detectors, Opto-Sensor grade-crossing logic), automation (auto-reversers, external relays, twin-coil alternators), signal / lighting electronics (alternating flashers, ditch-light oscillators, strobe drivers), power supplies, and a complete set of Tortoise / SMAIL replacement parts plus the solderless ZipZ connection system. Most circuits work with AC, DC, or DCC track power unless specifically noted otherwise.
In stock at Oakville Model Trains Depot.