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High-voltage DC motor speed controllers are designed for motors rated for greater than 50V operating voltage. Open frame or enclosed models with SCR outputs are available. DC drives are used for precise speed control of DC motors and gearmotors in a wide range of industrial applications.
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DC Drives
Category Selection
DC drives are used for controlling the speed of a DC motor. These drives convert an AC or DC input into the needed DC supply for the motor using a rectifier circuit. This supply can be varied to control the motor's speed.
DC motors and drives are suitable for many applications including conveyors, turntables, and others for which adjustable speed and constant or low-speed torque are required. They also work well in dynamic braking and reversing applications, which are common in many industrial machines.
Our selection of DC drives offers:
- Numerous input voltages: 12-48 VDC, 12/24 VAC, 24/36 VAC,115/230 VAC, and 120/240 VAC
- Several output voltages: 12, 24, 36, 48, 90, and 180 VDC
- Up to 20A of output current
- Open frame and NEMA 4/12 or 4X housings
For part listings and specifications, go to Shop Now.
GSD1 Series DC Drives
IronHorse GSD1 series DC drives are high-performance Pulse-Width- Modulated (PWM) controllers for 12 to 48 volt equipment providing smooth control with high-efficiency operation.
- For low voltage (< 50V) applications
- 1/50 to 1hp ratings
- Jumper selectable 12, 24, 36 or 48V input voltage
- Provides smooth variable speed capability for mobile equipment
- Automatic compensation holds motor speed if load varies or battery voltage declines
- Available in 10, 15 and 20A versions
- Inhibit terminal permits optional start/stop without breaking battery / power line
- Adjustable max speed, min speed, current limit, I.R. compensation, and acceleration
- Speed adjustment using 5k Ohm speed pot or optional 0-10 VDC analog input
Starting at
$224.00
(GSD1-48-10C)
GSD3 Series DC Drives
IronHorse GSD3 series DC drives are general-purpose, economical variable speed controllers for small DC and universal motor applications, featuring a DC output current rating of 2 amps, adjustable trim pot settings, and quick-connect terminal pins.
- Options for low voltage (< 50V) and high voltage (> 50V) applications
- 1/50 to 1/12hp @ 12/24 VAC; 1/50 to 2/3hp @ 120/240 VAC input
- Full-wave bridge power supply
- Adjustable minimum speed, maximum speed, IR compensation
- Fixed acceleration (0.5 seconds)
- 25:1 speed range, 1% speed regulation
- 5k Ohm speed pot with leads, knob and dial included
Starting at
$97.00
(GSD3-240-2CL)
GSD4 Series DC Drives
IronHorse GSD4(A) series DC drives provide cost efficient, reliable control for permanent magnet, shunt wound, and universal motors. Installation and field adjustments are simplified using a barrier type terminal strip and large, easily adjustable trim pots to adjust horsepower ranges.
- Options for low voltage (< 50V) and high voltage (> 50V) applications
- 1/50 to 1/6hp @ 24/36 VAC; 1/50 to 2hp @ 120/240 VAC input
- Full-wave bridge supply
- Adjustable horsepower settings, min and max speed, IR compensation, current limit
- Adjustable acceleration and deceleration (enclosed models and GSD4A)
- 50:1 speed range
- 1% speed regulation with armature voltage feedback (+/- 1/2% with tach feedback)
- 5k ohm speed potentiometer with leads, dial and knob included
- Voltage following or DC tachometer follower by supplying ungrounded analog input
- DC tachometer feedback
- Inhibit circuit permits start and stop without breaking AC lines
- Adjustable Accel and Decel trim pots (GSD4A)
- Optional Modbus RTU communications module (GSD4A)
Starting at
$137.00
(GSD4A-240-2C)
GSD5 Series DC Drives
IronHorse GSD5 series DC drives offer superb flexibility, reliability, and value. A general purpose, economical line of drives rated to 2 horsepower, it provides the ultimate in standard features and versatility.
- For high voltage (> 50V) applications
- 1/8 to 2hp @ 120/240 VAC input
- Packaged bridge supply (full wave)
- Adjustable horsepower settings, min and max speed, IR compensation, current limit
- Adjustable linear acceleration
- 50:1 speed range
- 1% speed regulation with armature voltage feedback (+/- 1/2% with tach feedback)
- 5k ohm speed potentiometer with leads, dial and knob included
- Voltage following or DC tachometer follower by supplying ungrounded analog input
- DC tachometer feedback
- Inhibit circuit permits start and stop without breaking AC lines
Starting at
$191.00
(GSD5-240-10C)
GSD6 Series DC Drive
The reliable, versatile, and economical GSD6 series is the most fully-featured IronHorse analog DC drive. It provides many standard features typically offered as options by other DC drives manufacturers.
- For high voltage (> 50V) applications
- 1/8 to 3hp @ 115/230 VAC input
- Packaged bridge supply (full wave)
- Adjustable horsepower settings, min and max speed, IR compensation, current limit
- Adjustable linear acceleration and deceleration
- 50:1 speed range
- 1% speed regulation with armature voltage feedback (+/- 1/2% with tach feedback)
- 5k ohm speed potentiometer with leads, dial and knob included
- Voltage following or DC tachometer follower by supplying ungrounded analog input
- DC tachometer feedback (jumper selectable)
- Inhibit circuit permits start and stop without breaking AC lines
- +12 VDC, 12mA power supply, user accessible
Priced at
$440.00
(GSD6-240-15C)
GSD7 Series DC Drives
With instant reversing, quick stopping, and rapid cycling, The IronHorse GSD7 series DC drives outperform other dynamic braking and reversing drives.
- For high voltage (> 50V) applications
- 1/50 to 1 hp @ 120 VAC input; 1/25 to 2 hp @ 240 VAC input
- Full-wave bridge supply
- Adjustable min and max speed, IR compensation, current limit
- Fixed acceleration (0.5 sec)
- Line voltage compensation
- 50:1 speed range
- 1% speed regulation with armature voltage feedback
- Duty cycles of 3 or 30 cycles per minute depending on model
- 5k ohm speed potentiometer with leads, dial and knob included
- Onboard dynamic brake resistor
- Automatic dynamic braking on power loss or emergency stop
- Shunt field supply provided
Starting at
$276.00
(GSD7-120-5CR3)
GSD8 Series DC Drives
The GSD8 series DC drives are compact, microprocessor-based motor controllers capable of factory or field configurations for a variety of industrial applications. GSD8 DC drives make use of either a pulse accumulation algorithm (GDS8-240-5C) or a velocity PID algorithm (all other GSD8 drives) that can be easily configured for operation as a speed controller, time-based process controller, or follower drive in a master-follower application.
- For high voltage (> 50V) applications
- 1/2 to 1 hp @ 120 VAC input; 1 to 2 hp @ 240 VAC input
- Digital closed-loop algorithm
- Non-volatile memory storage
- Programmable alarm output
- Power supply accepts 85-265 VAC at 50-60 Hz without switches or jumpers
- Self-contained 5V power supply for external sensor
- Large 4-digit LED display
- European terminal block
- Standard 1/8 or 1/4 DIN panel mounting
- Meets NEMA 4X standards when used with NEMA 4X enclosures
Starting at
$471.00
(GSD8-240-5C)
DC Drive Accessories
Accessories and option cards help with installation and customization of IronHorse DC drives, including:
- Accel/decel adjustment card
- Analog current and voltage signal input cards
- Signal conditioner
- Manual reverse switch
- Heatsinks
- Encoders
- Replacement potentiometer kit
- Digital potentiometers
- Communication module
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