5AC901.BUPS-01 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The 5AC901.BUPS-01 is an addon module manufactured by B & R Automation as part of the 5AC CNC Addon Modules series. It features a maintenance-free lead acid VRLA battery configuration with two 12 V batteries in series and a total nominal voltage of 24 V. The module has a capacity of 2.2 Ah and supports a maximum operating elevation of 3000 meters.
Internal Product Review
The 5AC901.BUPS-01 is a B & R Automation CNC battery backup module built with VRLA lead-acid chemistry and a 24 V nominal rating. Maintenance-free operation and 2.2 Ah capacity support dependable reserve power service in control applications. A practical choice for CNC systems where stable backup performance is critical.
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Product Description:
The 5AC901.BUPS-01 battery module is produced by B&R Automation for the 5AC CNC Addon Modules series. It functions as a buffered uninterruptible power supply that bridges short mains outages so CNC axes can decelerate safely and controller data remain intact in industrial cells. During brief supply interruptions, the buffered section keeps control electronics energized long enough for an orderly stop rather than an abrupt loss of power. Integrated into the DC rail, it provides temporary energy storage without altering the control topology, making it a straightforward reliability component within automated machining centers and robotic stations.
The module uses a lead-acid (VRLA) chemistry, meaning its electrolyte is immobilized and the risk of leakage during cabinet vibration is reduced. Two batteries are wired as 2 × 12 V in series, so the unit presents a regulated 24 V DC output that matches the logic and drive supply used by B&R controllers. With a rated capacity of 2.2 Ah, it can source roughly 2.2 amperes for one hour, which is enough to support embedded PCs and brake circuits during an orderly shutdown. Because the design is maintenance-free, it does not require water replenishment or scheduled electrolyte checks. A negative-temperature-coefficient sensor placed on the cells reports internal temperature to the supervising CPU, allowing charge current adaptation as conditions change during operation or recharge.
For compact cabinet layouts, the module has a depth of 115 mm, a height of 78 mm, and a width of 188 mm, enabling direct DIN-rail installation next to motion drives. Its compact proportions leave room for adjacent power supplies, I/O modules, and motion hardware on the same rail. The assembly is intended for continuous operation at elevations up to 3000 m, where lower air density can reduce convection cooling. For extended storage, the battery should receive a refresh charge every six months to help prevent sulfation, and the included NTC sensor can be used to verify temperature conditions before the module is returned to service.
