04.F5.S3A-3I21 KEB
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The KEB 04.F5.S3A-3I21 is part of the F5 Combivert Axis Drives series and features closed loop field-oriented control of motors. It includes 5 digital inputs with 13 to 30 V DC, 2 digital outputs, and 2 encoder inputs. The unit is equipped with a braking transistor, EMI filter, and supports a 1 millisecond I/O scan time.
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Product Description:
The 04.F5.S3A-3I21 is an axis drive module from the F5 Combivert Axis Drives series manufactured by KEB. It performs closed-loop, field-oriented control of synchronous or induction motors, allowing speed and torque to follow command profiles generated by a PLC or motion controller. The unit uses housing form factor code A and includes an integrated braking transistor and EMI filter for cabinet installation. In multi-axis machinery, the drive processes feedback through as many as two encoder inputs, allowing accurate rotor position capture for coordinated motion.
The control core samples its I/O every 1 ms, while a faster torque setpoint path refreshes every 250 µs to maintain precise current regulation. One analog input accepts signals within a range of ±10 V and provides 11-bit resolution. A matching analog output reproduces reference or diagnostic values across the same electrical range. A counter input tracks incremental events at frequencies up to 500 Hz, making it suitable for spindle orientation or basic length measurement. Digital resources include five digital inputs and two digital outputs, with discrete events processed alongside the analog channels so mixed-signal updates reach the motor model during the same control cycle.
The digital inputs accept field voltages from 13 to 30 V DC. The sourcing outputs can deliver a combined load of 50 mA for status lamps or actuator pilot signals. An isolated relay output carries up to 30 V DC at 1 A for use in interlock chains. Internally, the drive processes position data with 32-bit resolution, providing the fine interpolation needed by the dual-encoder interface. The available analog output, counter input, relay contact, and discrete I/O support direct connections to common control signals without requiring separate interface modules.
