Pallet Handling Conveyor is chain-driven.
Press Release Summary:

Original Press Release:
Hytrol's New 25-CREZD Chain Roller Accumulator
The 25-CREZD is the most intelligent and efficient heavy duty, chain driven roll-to-roll accumulation conveyor in the industry. This pallet handling conveyor combines the intelligence of the
patented EZLogic Accumulation system with the efficiency of the all new EZ Drive System that eliminates many of the mechanical components.
This unit is composed of accumulation zones ranging from 30 inches to 120 inches in length, each of which contains a drive. The drive is turned off when there are no pallets present or when pallets are accumulated, greatly reducing the operating cost over conventional pallet handling conveyor.