12.F5.C1B-L50A KEB
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The KEB 12.F5.C1B-L50A is part of the F5 Combivert Axis Drives series and features a 3-phase 400 V AC input configuration with a maximum motor power of 5 HP. This drive offers 8 digital inputs, 2 analog inputs, 2 digital outputs, and 2 relay outputs, along with a peak current of 21 A and IP20 enclosure rating. It operates in open-loop mode and includes a braking transistor accessory.
Internal Product Review
The 12.F5.C1B-L50A is a KEB F5 Combivert axis drive configured for open-loop operation and 5 HP motor power. A 3-phase 400 V AC input and installed braking transistor support stable motion control in demanding panels. Fast response from the 2 ms I/O scan time makes the drive a strong performer for precise applications.
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Product Description:
The 12.F5.C1B-L50A axis drive is produced by KEB as part of the F5 Combivert Axis Drives series. It is an open-loop inverter that processes three-phase mains power and converts it into a regulated output for induction or synchronous motors. In automated machinery, the drive serves as the link between the plant controller and the motor, modulating voltage and frequency while exchanging status over its discrete and analog I/O. Its integrated braking transistor lets the unit absorb regenerative energy during rapid deceleration without external hardware, which helps maintain controlled stopping behavior when loads return energy to the DC bus.
In operation, the drive accepts a 3-phase 400 V AC input. It uses a carrier frequency of 4 kHz, a switching rate that balances acoustic noise with motor current ripple. The continuous output capability is 9.5 A, while the short-term peak reaches 21 A to accommodate acceleration or load surges. Protection against finger contact and falling debris is provided by the IP20 enclosure, so it must be installed inside a closed control cabinet.
Control integration relies on 8 digital inputs, two relay outputs, and a pair of digital sinks, all scanned every 2 ms so command changes reach the modulator without noticeable lag. During high-duty machine cycles, the internal logic keeps electromagnetic interference within C1 limits, allowing the cabinet to meet residential emission requirements without extra filters. The embedded microprocessor supervises a maximum shaft load of 5 HP, matching the housing size B mechanical frame and the inverter size code 12. The 24 V DC internal supply and 29 available terminals support sensor connections, braking resistor wiring, and general field wiring with minimal external accessories, including common machine signals and basic interlocks within the cabinet.
