DC servo drive
ElectroCraft PRO Series programmable DC drives
Programmable low-voltage servo drives for 9 to 90 V DC, from 4 A continuous / 10 A peak to 50 A continuous / 90 A peak (series maximum), with RS-232, CANopen or EtherCAT.
Key specifications
| Voltage (max) | 90 V |
|---|---|
| Data / bus | RS-232, CANopen, EtherCAT |
| Supply | 9–90 V DC (by model) |
| Continuous current (max) | 50 A |
| Peak current (max) | 90 A |
Summarised in our own words from ElectroCraft, Inc.'s published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
Models PRO-A04V36, PRO-A08V48, PRO-A20V80, PRO-A50V48. Power ratings not published on the overview page.
Specify Motion is not affiliated with ElectroCraft, Inc.. ElectroCraft and PRO Series programmable DC drives are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with an ElectroCraft part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These 3 series from our supply network are the closest match on published figures.
Single-axis 24-70 VDC servo drives from 5 to 60 Arms (180 A peak), in RS (Modbus/pulse/analogue) and CAN (CANopen/analogue) versions. They drive brushless, brushed and PMSM motors including ELVM, with STO SIL3 and backup logic supply on the 40/60 A models.
| Published maximum | PRO Series programmable DC drives | ELD2 Series Low-Voltage DC Servo Drives |
|---|---|---|
| Continuous current | 50 A | 60 A meets or exceeds |
| Peak current | 90 A | 180 A meets or exceeds |
| Power | — | 2,500 W |
| Axes | — | 1 |
ADVANCED Motion Controls' ultra-compact, high power-density digital servo drives for 10-90 VDC systems, up to 100 A continuous and 200 A peak. They come in PCB, machine-embedded, panel and development-board formats, carry STO as standard, and run EtherCAT, CANopen or Ethernet/IP. Extended-environment models are rated -40 to +95 C.
| Published maximum | PRO Series programmable DC drives | FlexPro Digital Servo Drives (FE, FX, … |
|---|---|---|
| Continuous current | 50 A | 100 A meets or exceeds |
| Peak current | 90 A | 200 A meets or exceeds |
Network-capable AMC digital drives spanning 10-747 VDC and 120-480 VAC, up to 150 A continuous and 250 A peak (27.4 kW peak power), in PCB, panel, machine and vehicle formats. They support almost any motor type and feedback, plus CANopen, EtherCAT, POWERLINK and Modbus.
| Published maximum | PRO Series programmable DC drives | DigiFlex Performance Servo Drives (DP,… |
|---|---|---|
| Continuous current | 50 A | 150 A meets or exceeds |
| Peak current | 90 A | 250 A meets or exceeds |
| Power | — | 27,400 W |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
What a DC servo drive is
A DC servo drive controls a servo motor from a low-voltage DC supply, typically between about 12 and 100 V, such as a battery or a DC power supply. It uses a PWM power stage to regulate current in brushless or brushed motors, with current, velocity and position loops closed using encoder or Hall feedback. Many are compact, some palm-sized, with CANopen, EtherCAT, Modbus or pulse inputs. Higher current is needed for the same power than with mains drives.
When engineers choose a DC servo drive
Choose a DC servo drive for mobile robots, AGVs, battery equipment, medical devices and machines designed around safety extra low voltage. It allows simple distribution and safe access to live parts. The trade-offs are current and power: high currents need heavy cables and good connections, so power is typically limited to a few kilowatts. For mains-powered machines above that, an AC servo drive is usually more economical.
How to specify the ElectroCraft PRO Series programmable DC drives
Send these with your enquiry and an engineer can confirm the right PRO Series programmable DC drives variant or an equivalent:
- Supply voltage range (V DC)
- Continuous and peak current (A)
- Motor type: brushless, brushed, linear
- Feedback: encoder, Hall or absolute
- Interface: CANopen, EtherCAT, Modbus, pulse
- Safety functions and STO
- Size, mounting and cooling
Common mistakes to avoid
- Ignoring battery voltage swing from full to low charge
- Undersizing cables and connectors for high current
- Forgetting regenerative energy into the battery
- Overlooking grounding and EMC on low-voltage systems
ElectroCraft PRO Series programmable DC drives: frequently asked questions
What is the ElectroCraft PRO Series programmable DC drives?
Programmable low-voltage servo drives for 9 to 90 V DC, from 4 A continuous / 10 A peak to 50 A continuous / 90 A peak (series maximum), with RS-232, CANopen or EtherCAT. Published series figures include voltage 90 V, continuous current 50 A, peak current 90 A. It is made by ElectroCraft, Inc.; Specify Motion can help source it or propose an equivalent.
Who makes the ElectroCraft PRO Series programmable DC drives?
The ElectroCraft PRO Series programmable DC drives is made by ElectroCraft (ElectroCraft, Inc.) and is listed here for engineers comparing options. Specify Motion is not affiliated with ElectroCraft, Inc.; brand names are used only to identify the product.
What is the voltage of the ElectroCraft PRO Series programmable DC drives?
The published series maximum voltage is 90 V. Individual models and sizes in the PRO Series programmable DC drives range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the ElectroCraft PRO Series programmable DC drives?
Yes. On published figures, Leadshine ELD2 Series Low-Voltage DC Servo Drives and ADVANCED Motion Controls FlexPro Digital Servo Drives (FE, FX, FM, FD, FMP; Micro and Mini sizes) are the closest match from our supply network. An engineer confirms the fit against your application before recommending anything.
Can a DC servo drive return energy to a battery?
Yes, during braking the motor regenerates energy into the DC bus, and with a battery it can be absorbed if the battery management system allows charging. Without a battery or with a full battery, voltage rises, so a braking resistor or clamp circuit may be needed. Check the drive's overvoltage threshold.
What size DC drive do I need?
Size the drive from the motor's continuous and peak current demands, the supply voltage range and the duty cycle. Allow margin above the motor's peak current and check how long the drive can deliver peak. Then confirm the interface and feedback types match the motor and controller.
Further reading: How to select a servo drive · How to select a pcb mount servo drive · Servo drives
Other dc servo drive series
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