Operating without chain, Model NB200 narrow-belt driven roller conveyor provides 3 release modes and zero-pressure accumulation. Self-tracking function recognizes when belt has shifted to left/right. Downstream zone look-ahead allows product to move downstream at optimal rate. Conveyor can switch between slug and singulation release modes to match flow demands. With dynamic autoslug functions, accumulation zones self-monitor product density and move product downstream when space is available.