PLEASE NOTE: Effective 2019, we no longer supply Control Techniques variable frequency drives and components. We have drives from several other manufacturers which can meet or exceed the performance characteristics of the Control Techniques line. Simply complete the form below, or contact us with the model of your current or obsolete Control Techniques drive and we’ll be glad to identify a suitable replacement.

Also, the Fincor and Saftronics lines of AC variable frequency drives, DC variable speed drives, and reduced voltage starters were once owned by Emerson but have been obsolete for several years. However, we have many years’ experience working with these drives and can quickly identify replacements capable of exceeding the quality and performance of these older drive technologies. For a suitable replacement, fill out the form below or contact us with your drive or application requirements, and we’ll handle it from there!

Commander SX

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NEMA 4X Washdown Drive

Obsolete Drive Replacement RFQ -

If you need a replacement for an existing obsolete drive, complete the following form and we will send you a quote for a suitable replacement.

* Required

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IP66 Nema 4X rating for mounting in close proximity to the motor and application.
Ambient temperature 40°C (104°F) without derating. Up to 50°C operation with a maximum derating of only one motor size.
Removable gland plate for easy termination and removal of control and motor cables.
Complies with EN954-1 Cat 3 with PX-Secure option. EMC cable gland option for shielded cable management.
Electromagnetic Immunity complies with EN61800-3 (Drive standard) and EN61 000-6-2 (generic standard).
Electromagnetic Emissions complies with EN61800-3 (Drive standard – 1st and 2nd environment) with integral EMC filter.
Complies with EN61000-6-3 and EN61000-6-4 (Generic standard) with integral EMC filter.
Earth leakage current less than 3mA with integral EMC filter in circuit.
European Hygienic Engineering and Design Group EHEDG and FDA hygienic recommendations have been adopted for the food industry

No paint. Anodised aluminium heat sink. Polycarbonate covers. All slopes> 3 degrees incline Roughness < 0.8 microns. No zones where liquids can accumulate.
Open loop vector control.
V/F control.
Closed loop vector with PX-Encoder option.
Speed reference input 0-1 OV, 0-20mA, 4-20mA.
Digital inputs Enable, Run forward, Run reverse, Jog, local/remote select
Switching frequency 3kHz to 11 kHz with 4.5kHz as default.
Acceleration and Deceleration ramps (linear and S-type).
Serial communication as standard

Modbus RTU RS485 via RJ45 connector.
DC injection braking as standard. Integral dynamic braking transistor and resistor PID Controller.
Undervoltage, Supply and DC Link overvoltage, Phase loss, Drive overload, Instantaneous overcurrent, Over temp, Short circuit, Ground fault, Over heat, Motor thermal, Watchdog.


Control Techniqus Commnader SX NEMA 4X Washdown AC Drive Dimensions.

Frame Size
H in (mm)
W in (mm)
D in (mm)

Information provided by Control Techniques, a world leader in the design, production and marketing of electronic drives for the control of electric motors.