21.R4.T60-1019 KEB
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The KEB 21.R4.T60-1019 belongs to the R4 Combivert Regenerative Units series and features a radio interference suppression filter to meet EMI standards EN 55011 and EN 61800-3. This submounted regenerative unit supports both single and parallel operation, with dimensions of 460 mm height, 140 mm width, and 234 mm depth.
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Product Description:
KEB manufactures the 21.R4.T60-1019 as part of its R4 Combivert Regenerative Units series. This regenerative power module connects to the DC link of compatible inverters and channels excess braking energy back to the supply network instead of wasting it as heat. The recovered power improves overall energy efficiency in automated conveyor lines, test stands, and packaging stations. Within a multi-axis system, the module provides a common return path so individual drives can decelerate without separate braking resistors, lowering cabinet temperature, reducing component count, and simplifying thermal management inside the electrical enclosure.
The unit uses a submounted installation style, so the assembly bolts beneath a main drive stack rather than occupying separate rail space. Its fixing points have a 6.5 mm hole diameter that accepts standard M6 hardware. The lateral spacing between mounting holes is 100 mm, while the vertical pitch measures 450 mm, allowing the chassis to align with pre-punched control panels. This mounting pattern supports efficient installation during new equipment builds or retrofits. The unit supports single-unit and parallel operating modes, allowing it to serve one inverter or operate with additional regenerative units when the application requires higher return current.
The enclosure footprint has an overall height of 460 mm, a width of 140 mm, and a depth of 234 mm. These dimensions provide the information needed to calculate cooling airflow, wire bend radii, and required access clearances within the cabinet. Conducted emissions are limited by an internal radio-frequency interference suppression filter that complies with EN 55011 and EN 61800-3. This filtering helps the unit operate near sensitive control wiring without requiring additional line reactors for high-frequency noise suppression. It also limits electrical noise reaching upstream breakers and residual-current devices during dynamic energy recovery, helping preserve signal integrity across connected fieldbus and sensor circuits.
