Motor Speed Inverters | McMaster-Carr

Control the speed and torque of DC motors. These drives have a dial for manual adjustments, or you can automate control by hooking them up to your PLC. Use the potentiometers to set parameters, such as minimum and maximum speed.

Reversing Motor—Operate in either direction with the flip of a switch or an input from your PLC. There’s no need to rewire the drive.

	Drives									Heat Sinks
	Output				Input
	Max. Current without Heat Sink, amp	Max. Current with Heat Sink, amp	Voltage, V DC	For Motor Power @ Voltage	Nominal Voltage	Electrical Phase	Certification		Each		Each
AC-to-DC







				Nonreversing Motor

				5	10	0 to 90 0 to 180	1/8 hp to 1 hp @ 90V DC 1/4 hp to 2 hp @ 180V DC	120V AC/240V AC	Single	C-UL Listed, UL Listed	7793K51	0000000	7793K55	0000000




						Reversing Motor

						5	10	0 to 90 0 to 180	1/8 hp to 1 hp @ 90V DC 1/4 hp to 2 hp @ 180V DC	120V AC/240V AC	Single	C-UL Listed, UL Listed	7793K52	000000	7793K55	000000

Open-Frame DC Motor Drives

Without an enclosure, these drives are ready to build directly into a machine. Adjust the dial to manually control the speed and torque of your setup’s DC motor, or hook them up to your PLC to automate control. These drives have potentiometers to set parameters, such as minimum and maximum speed.

	Drives									Heat Sinks
	Output				Input
	Max. Current without Heat Sink, amp	Max. Current with Heat Sink, amp	Voltage, V DC	For Motor Power @ Voltage	Nominal Voltage	Electrical Phase	Certification		Each		Each
DC-to-DC







				Nonreversing Motor

				16	—	0 to 12 0 to 24	1/6 hp @ 12V DC 1/6 hp to 1/3 hp @ 24V DC	12V DC/24V DC	—	C-UL Listed	7729K13	0000000	———	0


				60	—	0 to 12 0 to 24	3/4 hp @ 12V DC 3/4 hp to 1 hp @ 24V DC	12V DC/24V DC	—	C-UL Listed	7729K11	000000	———	0


				AC-to-DC







								Nonreversing Motor

								5	10	0 to 90 0 to 180	1/8 hp to 1 hp @ 90V DC 1/4 hp to 2 hp @ 180V DC	120V AC/240V AC	Single	C-UL Listed, UL Listed	7793K12	000000	7793K65	000000

Washdown DC Motor Drives

Keep these drives dry, even near washdown zones. A NEMA 4X-rated enclosure seals out moisture and dust. Adjust the dial to manually control the speed and torque of your setup’s DC motor, or hook them up to your PLC to automate control. These drives have potentiometers to set parameters, such as minimum and maximum speed.

Reversing Motor—Operate in either direction with the flip of a switch or an input from your PLC. There’s no need to rewire the drive.

	Output			Input
	Max. Current, amp	Voltage, V DC	For Motor Power @ Voltage	Nominal Voltage	Electrical Phase	Enclosure Rating	Certification		Each
AC-to-DC







				Nonreversing Motor

				10	0 to 90 0 to 180	1/8 hp to 1 hp @ 90V DC 1/4 hp to 2 hp @ 180V DC	120V AC/240V AC	Single	NEMA 4X	C-UL Listed, UL Listed	7793K63	0000000




						Reversing Motor

						10	0 to 90 0 to 180	1/8 hp to 1 hp @ 90V DC 1/4 hp to 2 hp @ 180V DC	120V AC/240V AC	Single	NEMA 4X	C-UL Listed, UL Listed	7793K64	000000

DIN-Rail Mount VFDs

Mount these VFDs to DIN rail inside a control panel. Set them to automatically adjust motor speed. Wire a potentiometer (not included) for remote manual control.

		Output
	For Max. Motor Power, hp	Max. Current, amp	Nominal Voltage	Frequency, Hz	Input Analog Signal	Mounting Location		Each
Single Phase—120V AC Nominal Input Voltage



		1/2	3	115V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K651	0000000


		1	4.8	115V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K652	000000


		Single Phase—240V AC Nominal Input Voltage



				1	4.8	230V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K658	000000


				2	7.8	230V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K655	000000
				3	11	230V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K656	000000


				Three Phase—240V AC Nominal Input Voltage



						1	4.8	230V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K657	000000


						2	7.8	230V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K659	000000
						3	11	230V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K761	000000


						Three Phase—480V AC Nominal Input Voltage



								1	2.2	460V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K762	000000


								3	5.6	460V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K763	000000
								5	7.6	460V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K764	000000
								7 1/2	12	460V AC	0 to 400	4 mA to 20 mA, 0V DC to 10V DC	DIN Rail, Panel	7786K765	00000000

Open Frame VFDs

Vary the speed of three-phase AC motors. Mount these VFDs inside a machine or control cabinet. They’re often used in packaging machines, conveyors, and vacuum equipment. Operate VFDs manually or remotely with an electrical signal.

		Output
	For Max. Motor Power, hp	Nominal Voltage	Frequency, Hz		Each
Single Phase—120/240V AC Nominal Input Voltage



		1/2	230V AC	0 to 120	6488K21	0000000


		1	230V AC	0 to 120	6488K22	000000

Input Adapters

Input Analog Signal		Each
0 to 5V DC, 0 to 10V DC, 4 to 20 mA	6488K31	0000000

Stepper Motor Drives

Tell your stepper motor how far and fast to go by adding a controller and drive to your system. A controller (sold separately) is similar to a PLC—it stores and run programs and send signals to a drive. The drive delivers power to the motor based on the signals from the controller.

Choose a drive rated at or below your motor's maximum current.

For the Manufacturer User Manual, click on a part number and select Product Detail.

Step Resolution—Step resolution determines the size of the step a motor takes. For example, setting a _1/128 step resolution on your drive divides one full step into 128 smaller steps. The smaller the steps your motor takes the more smoothly and precisely it will move.

Number of Step Resolution Settings—Drives can be set to different step resolutions. The higher the number of step resolution settings, the greater the flexibility you have for determining the size of the motor’s step.

							Overall
Current per Phase, amp	Voltage	Step Resolution	No. of Step Resolution Settings	Max. Step Freq., MHz	For Stepper Motor Polarity	Wire Connection	Lg.	Wd.	Ht.		Each
0.3 to 2.2	12V DC to 48V DC	1, 1/2, 1/10, 1/25, 1/64, 1/100	6	2	Bipolar	Screw Terminal	2.6"	3.7"	0.8"	6627T911	0000000
2.35 to 8	24V DC to 75V DC	1, 1/2, 1/10, 1/25, 1/64, 1/100	6	2	Bipolar	Screw Terminal	3.3"	4.7"	1.3"	6627T912	000000
0.4 to 8	90V AC to 240V AC	1, 1/2, 1/4, 1/5, 1/8, 1/10, 1/16, 1/20, 1/25, 1/32, 1/40, 1/50, 1/64, 1/100, 1/125, 1/128	16	2	Bipolar	Screw Terminal	4.7"	7"	2.1"	6627T914	000000

Stepper Motor Controller/Drives

Tell your stepper motor how far and fast to go by adding a controller and drive to your system. A controller is similar to a PLC—they store and run programs and send signals to a drive. These controllers have commands specifically for stepper motors such as number of steps and direction. The drive delivers power to the motor based on the signals from the controller.

Simplify setup with these single units. The controller and drive are combined, so you can determine all your settings from one device including number of steps, direction, and step resolution. They have multiple inputs and outputs to communicate with more than just a motor. Connect sensors and switches or link multiple controllers together to coordinate movements between motors.

Choose a controller/drive rated at or below your motor’s maximum current.

For the Manufacturer User Manual, click on a part number and select Product Detail.

Encoder Compatible—Encoder-compatible controller/drives are best when relative positioning is critical, such as coordinating motion in a multi-axis system. They connect to an encoder (not included), which monitors the position of the motor's shaft and reports back to the controller.

					No. of Inputs/Outputs			Overall
Current per Phase, amp	Voltage	Step Resolution	No. of Step Resolution Settings	Max. Step Freq., MHz	Digital (Input)	Digital (Output)	For Stepper Motor Polarity	Lg.	Wd.	Ht.	Includes	Features		Each
0.1 to 6	12V DC to 48V DC	1 to 1/256	25,501	2	8	4	Bipolar	2.4"	3.9"	0.9"	I/O Cable	—	6627T93	0000000
0.1 to 10	24V DC to 80V DC	1 to 1/256	25,501	2	8	4	Bipolar	3"	5"	1.75"	—	Encoder Compatible	6627T916	000000
0.5 to 6	94V AC to 135V AC	1 to 1/256	25,501	2	7	3	Bipolar	4.7"	6.4"	2.3"	—	—	6627T917	00000000

Washdown VFDs

Rated NEMA 4, these VFDs are protected from washdowns. Set them to automatically adjust motor speed. Wire a potentiometer (not included) for remote manual control.

NEMA 12 Enclosure Rating—Controls rated NEMA 12 also protect against splashes of oil and coolant when used indoors only.

		Output
	For Max. Motor Power, hp	Max. Current, amp	Nominal Voltage	Frequency, Hz	Input Analog Signal	Environment	Enclosure Rating		Each
Single Phase—240V AC Nominal Input Voltage



		1 1/2	4.3	230V AC	0 to 120	4 mA to 20 mA, 0V DC to 10V DC	Oily, Outdoor, Washdown, Wet, Corrosive, Dusty	NEMA 4, NEMA 12, IP66	7786K721	0000000


		Single/Three Phase—240V AC Nominal Input Voltage



				2	7.3	230V AC	0 to 500	4 mA to 20 mA, 0V DC to 10V DC	Outdoor, Washdown, Wet, Dusty	NEMA 4, IP66	7786K391	000000


				Three Phase—480V AC Nominal Input Voltage



						3	4.3	460V AC	0 to 500	4 mA to 20 mA, 0V DC to 10V DC	Outdoor, Washdown, Wet, Dusty	NEMA 4, IP66	7786K361	000000


						3	4.3	460V AC	0 to 500	4 mA to 20 mA, 0V DC to 10V DC	Outdoor, Washdown, Wet, Corrosive, Dusty	NEMA 4, IP66	7786K381	000000