Accumulating Models
Photo-eye controlled zones provide zero-pressure accumulation and controlled product release.
24VDC Powered Roller Technology
Motorized Roller Conveyor (MDR).
Energy-efficient zoned transport and zero-pressure accumulation for cartons, totes, cases, packages, and compatible unit loads.
ACSI MDR Family
Explore the 190MRA Model Family.
The 190MRA page contains the detailed specifications, resources, configuration tables, and options for ACSI motorized roller conveyors.
Model 190MRA Family
24VDC Motorized Roller Conveyor
Zoned transport and zero-pressure accumulation with straight, curve, belted-zone, Poly-V, 1.9-inch, and 2.5-inch configurations.
View Models & Specifications →Transport Models
Non-accumulating configurations move compatible unit loads without zoned accumulation control.
Routing Options
Straight and curved configurations support system layouts, turns, and flow paths.
Surface & Drive Choices
O-ring, Poly-V, chain-driven, and belted-zone variations address differing product and duty requirements.
The Fundamentals
How Does a Motorized Roller Conveyor Work?
A motorized roller conveyor uses compact 24VDC motor-driven rollers to power defined conveyor zones. Each motorized roller transfers motion to adjacent carrying rollers, allowing sections of the conveyor to operate only when product movement is required.
Zone control makes MDR well suited to transporting, queuing, buffering, positioning, and releasing compatible cartons, totes, cases, and packages. In a zero-pressure accumulation system, sensing and controls stop upstream zones before products contact one another, then release loads according to the required flow logic.
Because power and control are distributed by zone, MDR systems can support quiet operation, reversing, variable speeds, controlled release, and flexible system sequencing. Product size, weight, bottom condition, throughput, zone length, route, controls, and environment must still be reviewed for the final design.
24VDC Roller Drive
A compact brushless motor inside a roller powers a local group of carrying rollers.
Independent Zones
Defined conveyor sections start and stop according to product sensing and control logic.
On-Demand Operation
Zones can remain idle until product movement is needed, reducing unnecessary conveyor motion.
Flexible Control
Applications can incorporate accumulation, controlled release, reversing, and variable-speed operation.
Application Guidance
Where Motorized Roller Fits.
MDR is a strong starting point when stable-bottom unit loads need controlled, quiet, zone-based movement through an automated process.
Compatible Unit Loads
Cartons, totes, cases, parcels, and packages need bottoms that receive adequate support from the selected roller spacing or belted surface.
Review: Footprint, weight, bottom, and orientation
Accumulation & Buffering
Use zero-pressure zones when products must queue without contact for merges, workstations, inspection, packing, or downstream process control.
Review: Zone length, sensors, release logic, and rate
Transport & Routing
Transport configurations, curves, and drive variations support assembly, warehousing, distribution, parcel, and fulfillment flow.
Review: Route, speed, total live load, and controls
Technology Comparison
Compare Powered Roller Drive Systems.
The correct platform depends on the product, duty, routing, accumulation method, controls, and environment—not the acronym alone.
Motorized Roller
Distributed 24VDC zones support on-demand transport, sensing, controlled release, and zero-pressure accumulation of compatible unit loads.
Belt Driven Live Roller
A common belt drive powers carrying rollers for economical transport, curves, spurs, and mechanical or photo-eye accumulation choices.
Line Shaft Live Roller
A longitudinal shaft and urethane O-rings drive the rollers for modular light- to medium-duty routing and optional accumulation.
When to evaluate CDLRFor heavy unit loads, pallets, oily conditions, or applications requiring positive roller-to-roller drive, compare chain driven live roller (CDLR). Final selection should be based on the actual load and operating conditions.
Buyer Questions
Motorized Roller Conveyor FAQs.
Answers to common questions about MDR terminology, products, controls, and available configurations.
What does MDR mean in conveyor systems?
MDR means motor-driven roller or motorized drive roller. A compact 24VDC motor is housed within a conveyor roller and transfers motion to adjacent rollers within a controlled conveyor zone.
What products can an MDR conveyor move?
MDR conveyors are commonly considered for cartons, totes, cases, packages, and other compatible unit loads with bottoms that receive adequate support from the selected roller spacing or belt surface.
Can motorized roller conveyor operate without accumulation?
Yes. The ACSI MDR family includes controlled zero-pressure accumulating configurations and transport configurations without accumulation zones.
What motorized roller configurations does ACSI offer?
The ACSI 190MRA family includes straight and curved configurations, accumulating and transport control arrangements, 1.9-inch and 2.5-inch roller platforms, and O-ring, Poly-V, chain-driven, and belted-zone variations.
MDR Conveyor Application Review
Start with the Product and Flow.
Share the product dimensions and weight, bottom condition, throughput, accumulation and release requirements, route, speed, controls, and operating environment. ACSI manufactures the conveyor equipment, and our distributors provide system integration and installation.