Home → Switches/Actuators → 800-5520 SD-2 Semaphore Driver
800-5520 SD-2 Semaphore Driver - MPM Hobbies

800-5520 SD-2 Semaphore Driver

$18.71 $24.95
**Free CONUS economy shipping on all orders over $100.00**
SKU: TOR5520
Available for pre-order
Try Lay-Buy at checkout. Minimum of 20% down and maximum 6 months "Lay Away" plan. Your product will be shipped after balance is paid. Pre-orders will ship after balance is paid in full and product becomes available. Select "PUT IT ON LAY-BUY' at checkout and spread out those payments. Terms and restrictions apply.
← Previous Product Next Product →

The SD-2 Semaphore Driver is designed for use with the CIRCUITRON TORTOISE™ and an upper or lower quadrant semaphore style signal. NOTE:  Neither the TORTOISE™, the signal
nor the signal linkage are included.

The SD-2 provides all the logic circuitry necessary to drive the signal to all three positions, and is designed to work with CIRCUITRON BD-1, BD-2 or BD-3 Block Occupancy Detectors. Other detection circuits that provide a logic low (- or ground) output may also be used. A minimum of 2 blocks must have detectors installed to allow 3 position indications. The SD-2 measures 2” x 3” and requires a 10-18 volt DC power source for proper operation.