Emerson / Control Techniques SK2202 | Unidrive SP Series Drive

The Control Techniques SK2202 (part of the Commander SK or Unidrive SP evolution series) is a compact, high-performance AC variable speed drive (VSD) designed for precise motor control in industrial applications. Engineered by Control Techniques (now part of Nidec/Emerson), the SK2202 is widely recognized for its “Drive-in-a-Box” philosophy—offering quick installation, ease of programming, and robust reliability for pump, fan, and general machinery control.

Technical Specifications

Parameter	Detail
Product Model	SK2202
Manufacturer	Control Techniques (Emerson/Nidec)
Motor Power	0.75 kW (1.0 HP)
Input Voltage	200–240V AC, Single-Phase
Control Method	V/Hz (Open Loop)
Communication	RJ45 (Modbus RTU standard)
Operating Temp	-10°C to +40°C (up to 50°C with derating)
Mounting	DIN-rail or panel mount
Dimensions (Approx.)	150mm x 75mm x 140mm
Weight	1.1 kg

Key Features

Ease of Use: Designed with fixed boost and simple parameter structure for rapid commissioning.
Compact Footprint: High power density allows for installation in tight control cabinets.
Integrated Logic: Includes onboard PLC functionality for simple control sequences without external controllers.
Flexible Mounting: Can be mounted side-by-side to optimize cabinet space.
Communication Options: Supports optional fieldbus modules (e.g., Profibus, Ethernet) for advanced integration.

Usage Instructions

Mounting: Install the drive in a clean, ventilated enclosure. Ensure the cooling vents on the top and bottom are not obstructed.
Wiring: Connect the single-phase AC supply to the L1 and L2/N terminals. Connect the 3-phase motor leads to the U, V, and W terminals. Ensure proper grounding to the PE terminal to prevent electrical noise.
Configuration: Use the front-panel keypad to set the basic motor parameters (Nameplate Voltage, Frequency, Current).
Logic: If using the internal PLC functions, use the Control Techniques SYPTLite software to program the drive’s control sequences.
Diagnostics: Observe the front LED display. If the drive trips (e.g., ‘trip’ code displayed), consult the manual to identify the fault (e.g., Overcurrent, Undervoltage) and reset using the stop/reset button.

EMERSON SK2202 CONTROL TECHNIQUES

Frequently Asked Questions (Q&A)

Q: Is the SK2202 obsolete?
- A: Yes, the Commander SK series has been superseded by newer generations like the Commander C series. While still widely available as refurbished or spare inventory, it is recommended to plan for migration to current models for new projects.
Q: Can this drive handle a 3-phase supply?
- A: The SK2202 is specifically designed for a single-phase input. If you have a 3-phase supply, you must use a drive rated for 3-phase input (typically denoted by different model suffixes).
Q: How do I perform a factory reset?
- A: Set parameter 0.00 to 1244 (or 1245 for European 50Hz defaults) and press the reset button. This will revert all parameters to the factory settings.