C3.S4.D4A-3E12 KEB
Wake Industrial LLC is not an authorized distributor of this product.
The KEB C3.S4.D4A-3E12 is a servo controller from the S4 Combivert Servo Controllers series with a voltage class of 400 V and IG-IO control interface. It offers IP20 protection, supports resolver encoder feedback, and operates at motor nominal speeds up to 3000 rpm. This controller can be installed at altitudes up to 2000 meters and functions within an operating temperature range of -10 to 45 degrees Celsius.
Internal Product Review
The C3.S4.D4A-3E12 is a KEB S4 Combivert servo controller with a 400 V voltage class and resolver encoder feedback. The IG-IO control interface supports straightforward integration, and IP20 protection suits clean cabinet installations. Operating capability from -10 to 45 °C adds useful environmental flexibility, making the controller a strong choice for dependable servo control.
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Product Description:
The C3.S4.D4A-3E12 servo controller is produced by KEB within the S4 Combivert Servo Controllers series. It converts line power into regulated three-phase output and coordinates motion commands from a PLC, allowing closed-loop speed or position regulation for industrial transport, pick-and-place, and process machinery. Through integrated signal processing, it synchronizes motor current with feedback devices to maintain dynamic response.
The 400 V voltage class sets the supply window and the internal insulation clearances, allowing the unit to connect directly to standard factory mains. Command and status signals travel through the IG-IO interface, enabling fast handshaking with digital controllers. Rotor position is returned by a resolver, which provides high noise immunity in harsh cabinet environments. Thermal protection is handled by an internal sensor that issues an inverter trip when the heat sink rises above 70 °C, helping prevent semiconductor damage. When paired with a matched servo motor, the drive maintains rated flux up to 3000 rpm, providing stable torque delivery throughout the speed range. The aluminum housing follows design code D and supports cabinet airflow across its finned sides.
Installation is permissible up to 2000 m above sea level, where derating of switching devices is not yet required. Ambient humidity may climb to 95% non-condensing, so conformal-coated boards are used to deter moisture-driven leakage. The enclosure carries an IP20 rating, which indicates finger-safe openings while relying on the cabinet for additional ingress protection. For integrated motor thermal monitoring, three PTC channels are accepted; cold resistance stays below 400 Ω, reset occurs under 500 Ω, and an over-temperature trip engages once they reach 1650 Ω. Storage is allowed down to -25 °C and up to 70 °C. An operating range from -10 °C to 45 °C allows full current delivery without external heaters or chillers.
