SK4203 - Variable speed drive - CONTROL TECHNIQUES

Control Techniques SK4203 frequency drive, SK series

The frequency drive reference SK4203 belongs to the SK series from the manufacturer CONTROL TECHNIQUES. Designed to control asynchronous motors in demanding production environments, it implements pulse-width modulation PWM with adjustable carrier frequency. The architecture integrates 2 microprocessors, including a DSP dedicated to signal synthesis, which supports precise speed regulation and reliable torque holding under load variations. This drive is aimed at maintenance managers, automation engineers and integrators seeking a robust solution for conveyors, pumps, ventilation and production machines. The SK series is designed for fast commissioning via the local keypad or Control Techniques commissioning tools, with a set of control I/Os that simplify integration with a programmable logic controller, a numeric controller or a supervision system.

Technical specifications

• Manufacturer reference : SK4203
• Range : SK series from CONTROL TECHNIQUES
• Manufacturer : CONTROL TECHNIQUES
• Type : Frequency drive for AC asynchronous motors
• Control : PWM with adjustable carrier frequency, precise speed and torque control
• Processor : 2-microprocessor architecture, including 1 DSP for signal synthesis
• Built-in functions : Configurable acceleration and deceleration ramps, motor protections
• User interface : Local keypad and Control Techniques commissioning tools
• Integration : Control I/O for closed-loop control and connection to a PLC
• Supply and power : Voltage and power range depend on the SK4203 variant; confirm on the nameplate

Overview of the Control Techniques SK series

The SK series from CONTROL TECHNIQUES is designed for speed variation of asynchronous motors within industrial automation architectures. It emphasizes regulation stability, ease of configuration and compatibility with common maintenance practices. DSP-based digital signal processing enables clean PWM synthesis and consistent dynamic response across the operating range. Motor protection and ramp management functions aim to reduce mechanical and electrical stress, thereby limiting wear on drives and coupled components. The ergonomics of the SK series make it easy to duplicate settings during a replacement, reducing downtime in case of failure or obsolescence. The control I/O logic ensures reliable interaction with machine safety devices and process signals, while access to parameters via keypad or commissioning software allows fine adjustment to the requirements of each application. In environments where frequency drives, servo-drives and motion controllers coexist, the SK series provides a versatile drive building block for loads with standard characteristics.

Industrial applications

This CONTROL TECHNIQUES frequency drive integrates into many production contexts. The control profile, configurable ramps and command interface enable effective open-loop operation with process feedback via the PLC. Typical uses include :

• Conveying and intralogistics : Speed adjustment for accumulation, transfer and sorting
• Pumps and ventilation : Flow adaptation and energy optimisation through speed reduction
• Production machines : Driving product transport units, dosing machines, coaters
• Food and packaging : Driving rollers, belts and indexing modules
• Materials handling : Control of feed motors on assembly or finishing lines

Integration and communication

The SK4203 is intended for direct integration into an automation architecture. The control inputs/outputs facilitate interfacing with a programmable logic controller, an operator panel or a SCADA system. Configuration is performed via the local keypad or using Control Techniques commissioning tools, which speeds up parameter duplication and preventive maintenance. Depending on the SK series configuration, optional communication modules can be used for data exchange over fieldbus networks. This modular approach allows adaptation to site standards without requiring an overhaul of the architecture. Key parameters include ramps, frequency limits, protection thresholds and I/O assignment to ensure a consistent drive response within the control loop managed by the PLC or the numeric controller. In installations where standard drives and high-dynamics axes coexist, the SK4203 operates alongside servo-drives, providing robust speed functions for loads with predictable inertia and torque.

Availability and warranty

The CONTROL TECHNIQUES SK4203 frequency drive is offered by Standard Exchange Industry as refurbished, exchange or repaired units, depending on the condition of your equipment. Each refurbished unit is tested on a test bench and delivered with a warranty appropriate to the service, typically between 6 and 24 months. Shipping is carried out within 24 to 72 hours to over 120 countries to minimise production line downtime. Our technical teams can verify reference compatibility with your motor and automation architecture from nameplate information, installation photos and the parameters in use. In case of obsolescence or uncertainty about the exact SK variant, we identify an alternative within the same range or an equivalent replacement solution, with commissioning support. This approach aims to ensure service continuity, manage technical risks and secure the performance of your process.