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DC drives are used for precise speed control of DC motors and gearmotors. These IronHorse enclosed DC motor speed controllers with SCR output are designed for motors rated for greater than 50V. With NEMA 4 or 4X ratings, these watertight models can be mounted anywhere (even outdoors). SCR or current loop outputs are available.
IronHorse High Voltage DC Drives
Category Selection
GSD Series DC Drives Overview and Selection Guide
GSD1 Series DC Drives
1/50 - 1 HP @ 12-48 VDC input
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.
- Available in open-frame and NEMA 4X enclosed styles
- 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
- Jumper selectable 12, 24, 36 or 48V operating voltage
- 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 pot or optional 0-10 VDC analog input signal
GSD3 Series DC Drives
1/50 - 1/12 HP @ 24-36 VAC; 1/50 - 2/3 HP @ 120-240 VAC input
IronHorse GSD3 series DC drives are general-purpose, economical variable speed controllers for small DC and universal motor applications, featuring DC output current rating of 2 Amps, adjustable trim pot settings, and quick-connect terminal pins.
- Available in open-frame and NEMA 4 enclosed styles
- Dual input voltage models of 12-24 VAC or 120-240 VAC
- 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
GSD4 Series DC Drives
1/50 - 1/6 HP @ 24-36 VAC; 1/50 - 2 HP @ 120-240 VAC input
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.
- Available in open-frame and NEMA 4X enclosed styles
- Dual input voltage 120-240 VAC or 24-36 VAC, 50/60Hz
- Full-wave bridge supply
- Barrier terminal strip
- 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) ... New!
GSD5 Series DC Drives
1/8 - 2 HP @ 120-240 VAC input
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, offered in open-frame and NEMA 4/12 enclosed models.
- Available in open frame and NEMA 4/12 rated enclosed styles
- Dual input voltage - 120-240 VAC, 50/60Hz
- Packaged bridge supply (full wave)
- Barrier terminal strip
- 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
- Power on/off switch (enclosed models)
- Voltage following or DC tachometer follower by supplying ungrounded analog input
- DC tachometer feedback
- Inhibit circuit permits start and stop without breaking AC lines
GSD6 Series DC Drive
1/8 - 3 HP @ 120-240 VAC input
The GSD6 series is the most fully-featured IronHorse analog DC drive. It provides many standard features typically offered as options from other manufacturers' by combining advanced engineering design, quality component selection, and rigorous quality control.
- Open frame style
- Dual input voltage - 120-240 VAC, 50/60Hz
- Packaged bridge supply (full wave)
- Barrier terminal strip
- 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
GSD7 Series DC Drives
1/50 - 1 HP @ 120 VAC input; 1/25 - 2 HP @ 240 VAC input
Instant reversing, quick stopping, rapid cycling ... The IronHorse GSD7 series DC drives outperform other dynamic braking and reversing drives by utilizing unique zero-speed detect and dynamic braking circuits. These circuits eliminate contact arcing and failed braking problems and eliminate motor plug reversing problems. In the event of a power loss or emergency stop condition, the GSD7 Series DC drives will drop into a dynamic brake condition.
- Open frame style
- Barrier terminal blocks
- 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
- Shunt field supply provided
GSD8 Series DC Drives
1/2 - 1 HP @ 120 VAC input; 1 - 2 HP @ 240 VAC input
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.
- Microprocessor-based design
- Digital closed-loop algorithm
- Non-volatile memory storage
- Factory or field programmable
- Adjustable parameters
- Programmable alarm output
- Universal 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 1/2 inch LED display
- European terminal block
- Standard 1/8 or 1/4 DIN panel mounting
- Meets NEMA 4X standards when used with NEMA 4X enclosures
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