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SSD-2A Directional Arrows

INTRODUCTION.
The SSD-2A is a Modular Serial 2 color Direction Arrows. 
The Arrows are connected via flat cable to the SSD digital display card. 
There is an option to use Direct connection with 3 wires . 
The Arrows / lanterns are programmable via Leeavís TST Portable Programmer. 
 
 
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