04.F5.S3A-3I2B KEB
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The KEB 04.F5.S3A-3I2B is part of the F5 Combivert Axis Drives series and operates on a three-phase 400 V AC/DC input supply. It has eight digital inputs, two relay outputs rated at 30 VDC and 1 A, and supports analog input and output resolutions of 11 bit and 10 bit respectively. The drive features an incremental TTL encoder interface, a carrier frequency of 8 kHz, and includes a braking transistor and EMI filter as installed accessories.
Internal Product Review
The 04.F5.S3A-3I2B is a KEB F5 Combivert axis drive designed for dependable motion control, with 3-phase 400 V AC/DC input and an integrated braking transistor with EMI filter. A 1 ms I/O scan time and 8 digital inputs give the unit crisp machine response and practical integration flexibility. Incremental TTL encoder support up to 300 kHz is a strong advantage for precise, high-speed axis applications.
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Product Description:
The 04.F5.S3A-3I2B is an axis drive module produced by KEB within the F5 Combivert Axis Drives series. It functions as a closed-loop inverter that delivers regulated power to synchronous or induction machine axes in automated lines, translating control signals into precise motor torque and speed profiles for positioning, conveying, and process tasks. As part of a multi-axis architecture, it links to PLCs through analog, digital, and encoder channels so that motion commands are executed with millisecond-level latency.
This drive samples command voltages with an 11 bit analog input converter, while feedback to supervisory controllers is issued through a 10 bit analog output channel. Eight opto-isolated digital inputs are scanned every 1 ms, and two transistor outputs share a 50 mA DC budget for fast status indication. For incremental feedback, the unit accepts signals up to 300 kHz over a differential TTL interface on the terminal connector terminated by 150 Ω, and an auxiliary signal bus also uses TTL levels to synchronize external counters. A programmable PWM carrier of 8 kHz modulates the output bridge, balancing acoustic noise with motor current ripple. Two form-C relay contacts can be wired for ready, fault, or motor-contactor logic, and the installed braking transistor with the EMI filter handles dynamic braking energy and suppresses conducted emissions.
During high-demand moves, the power stage can supply up to 400% of its nominal current for short bursts, and an overcurrent cutoff activates at 480% to protect the semiconductors. These limits apply to a 3-phase 400 V AC/DC line that feeds the DC link. Field devices are driven through the dual relay channel, which is rated at 30 VDC, 1 A for small solenoids or contactors. Regenerated energy is routed into the factory-installed braking transistor, while the integrated EMI filter reduces conducted noise.
