SD-3 SIGNAL DRIVER, BI-COLOR LED
The CIRCUITRON SD-3 is capable of driving any single searchlight style, 2 lead or 3 lead, Bi-Color or Tri-Color, LEDtype signal to red, green and amber aspects. Compatible signals are manufactured by Oregon Rail Supply, Tomar, Sunrise Enterprises, ISS and others. Two SD-3s are required for double-head signals. NOTE: The SD-3 will not drive 3 lamp signals (see SD-1 above). Bi-color LEDs contain both a RED and a GREEN chip mounted side by side. Amber is achieved by alternately lighting the red and green LED chips at a high frequency. The eye perceives this mix of red and green as yellow (amber). A hue adjustment is provided on the SD-3 to allow adjusting the amber color. The SD-3 may be controlled by a single-pole, 3 position switch or automatically by detection circuits such as the CIRCUITRON BD-1, BD-2 or BD-3 (minimum of 2 blocks required). Other detection circuits that provide a logic low (ground or -) output may also be used. The SD-3 is constructed on a 2” x 3” printed circuit board and requires a 10 - 18 volts AC or DC input (a DC power source is required when the SD-3 is used with detection circuits).
Although CIRCUITRON Block Occupancy Detectors can directly control 2-color block signals without any additional logic or drivers necessary, whenever you want to connect prototypical 3-color signals, you must have a driver circuit for each signal which will accept the outputs from the “home” and “following” block detectors and translate this information to drive the signal to the proper aspect. CIRCUITRON has driver circuits available for nearly all popular signal types including single and dual head searchlight with Bi-color or Tricolor Light Emitting Diodes, color light signals of any configuration (type D, type G, etc.), position light signals (Pennsylvania, Norfolk & Western, etc.) and color position light signals (B & O). We also have a semaphore driver to be used in conjunction with the CIRCUITRON TORTOISE™ Slow Motion Switch Machine.
800-5530 SD-3 SIGNAL DRIVER, BI-COLOR LED
MSRP $26.95