Products DC Motor and Controllers

The Vari Speed® R400 is a full-wave DC regenerative control that provides high performance four quadrant speed and torque control. The R400 solid state controller converts single phase AC line power into an adjustable DC power to control 1/4 to 2 horsepower DC motors.

The R400's flexible design is easily selectable for speed or torque mode, tachometer voltage, dual voltage and for horsepower size. The R400 is designed with today's most desirable features including isolated input signals, status indicators, alarm outputs. When performing frequent directional changes, the R400 transfers excess system energy back to the AC line rather than wasting additional energy by the use of a dynamic brake resistor.

The R400 is designed, engineered and manufactured in the USA, and is UL and cUL listed.

The Vari Speed® S1000 is a high-performance DC motor speed control designed for maximum reliability in 1/20 to 2 HP applications. The surface mount technology incorporated into the design reduces package size and improves reliability... creating a savings in both cost and space for you.

• 176B1113, 120 VAC, 45 Deg. Terminal Block
• 176B1114, 240 VAC, 45 Deg. Terminal Block

• Includes a 5 K ohm, 1W pot, and mounting hardware.

• Plug-on design allows for easy field modification
• Refer to ratings chart for correct part number

The Vari Speed® A2000 is compact, rugged, reliable and flexible. Available in 1/2 - 3 HP control rating configurations, the Vari Speed A2000 Series incorporates surface mount technology to reduce package size and improve reliability.

• Compact, extremely rugged speed drive for standard permanent magnet or would-field DC motors
• 120 or 240 VAC line input
• Nine models rated for 1/8 to 3 HP
• Available in chassis, NEMA 12 or NEMA 4 enclosure
• LED status indicators for Power On, Run, and Current Limits
• Chassis units are UL and cUL listed

• Run/Jog/Stop switch
• Indicators for Power On, Run and Current Limit

Graham's Motors and Controls Cycletrol® Series DC adjustable speed controls provide rapid cycling capabilities, while offering higher reliability and lower maintenance compared to clutch/brake mechanisms. The Cycletrol Series consists of two product lines, the 150 Series rated for up to 60 cycles/minute and the C2000 rated for up to 30 cycles/minute.

• All Cycletrol digital logic inputs are optically isolated
• Versatile logic allows direct interfacing with switches and push-buttons or solid state devices
• LED function lights are easy-to-see indicators of control status
• Transient protection by voltage clamping MOV's and RC networks protect power components against power spikes
• Torque limiting by the Cycletrol's adjustable current limit provides motor and drive train protection in the event of machine overloads or jams
• Heavy-duty aluminum chassis or NEMA 12 enclosures



The Cycletrol 150 is the fastest cycling DC motor control in the industry. On-board logic conotrols reduce costly external relays and timing circuits.

• Cycle rate up to 60 CPM allows quick, repetitive run/stop opetaration with cycling duty permanet magnet motors
• wide speed range with full torque available dows to 9 rpm
• Integrated timer enables automatic cycling: eliminate external componets and wiring
• Start-up current (up to 400%) provides extra starting torque for fast acceleration
• Solid-state dynamic brake circuit for faster response without the wear normally associated with mechanical system
• Magnetic circuit breaker standard on NEMA 12 enclosure models
• CE Rated

Graham's Motors and Controls Cycletrol® Series DC adjustable speed controls provide rapid cycling capabilities, while offering higher reliability and lower maintenance compared to clutch/brake mechanisms. The Cycletrol Series consists of two product lines, the 150 Series rated for up to 60 cycles/minute and the C2000 rated for up to 30 cycles/minute.

• All Cycletrol digital logic inputs are optically isolated
• Versatile logic allows direct interfacing with switches and push-buttons or solid state devices
• LED function lights are easy-to-see indicators of control status
• Transient protection by voltage clamping MOV's and RC networks protect power components against power spikes
• Torque limiting by the Cycletrol's adjustable current limit provides motor and drive train protection in the event of machine overloads or jams
• Heavy-duty aluminum chassis or NEMA 12 enclosures



The Cycltrol C200 Serie DC drive provides rapid cycling up to 30 cpm. The C200 serves as an accurate speed and cycling conotrol and is coverred by our two-year warranty.

• - Econimical alternative for lighter duty cycling applications
• Wide speed range with full torque available sodwn to 60 rpm