• Circuitron Block Occupancy Detector

    $39.95

    BD-1HD BLOCK OCCUPANCY

    DETECTOR - OPTO-ELECTRONIC

    The CIRCUITRON BD-1 is an advanced,

    integrated circuit design Block Occupancy

    Detector utilizing our proven Opto-Electronic

    design which provides

    positive indication whenever

    a block-section of a

    layout is occupied by

    any piece of rolling

    stock. Two pair of

    CIRCUITRON Opto-

    Sensors (included) are

    mounted between the

    ties at the end points of

    the block that is to be

    protected. Any piece of

    rolling stock entering the

    block shades the Opto-Sensors from ambient

    room light which activates the logic circuitry

    on the BD-1 circuit board. No modifications to

    rolling stock are necessary. The BD-1 is bidirectional

    and will give proper indications even

    if a train leaves a block by reversing direction

    and backing out. The CIRCUITRON BD-1 also

    contains driver circuitry sufficient to power a

    pair of two-color LED (including 2 lead Bi-Color

    LEDs) or incandescent lamp block signals at

    each end of the protected block (LED-type

    signals must be wired with a common anode

    [+] configuration). The outputs on the BD-1

    can control a maximum of 250 ma. For 3-

    color signaling, additional signal drivers will be

    necessary (see our SD-x series of drivers later

    in this section). The BD-1 requires a 10-18

    volt DC input for proper operation. The power

    supply should be filtered for proper operation.

    If you do not have a filtered power supply, the

    CIRCUITRON PS-1 filtered AC to DC Converter

    or PS-2 Regulated AC to DC Converter are

    ideal for this application. The BD-1 is

    constructed on a 2” x 3” printed circuit board.

    The BD-1HD is identical to the BD-1 but

    includes heavy duty output transistors to

    power lamps in large scale signals. Each

    output on the BD-1HD can control 500 ma.


    Reviews