Brushless Servo Drives For High-Volume Applications

Compumotor’s OEM670 and OEM675 Series of servo drives were designed for the needs of OEMs and high-volume users with a fractional horsepower motion control application. These products were developed to provide performance, compact packaging, reliability, and power. The OEM670T and OEM675T are torque amplifiers utilizing a ± 10VDC analog input making them directly compatible with industry standard motion controllers. The OEM670SD and OEM675SD drives use the same command interface found on most step motor amplifiers, allowing an easy upgrade from step motors to the higher performance levels found in brushless servo systems.

Although the voltage and current are the same for the OEM670 and OEM675, the OEM670’s current compensation loop is optimized for NeoMetric and J Series motors; the OEM675’s current compensation loop is optimized for SM and SE motors. We recommend that you use the OEM670 with NeoMetric and J Series motors, and use the OEM675 with SM and SE motors. This provides optimum system transient response for better system performance (easier tuning, better settling time, etc.).

Features

Performance

• Torque Mode operation with OEM670T and OEM675T
• Step & Direction operation with OEM670SD and OEM675SD
• Three-state current control for more efficient drive and cooler motor operation
• Configurable current fold-back
• Plug-in resistors for peak and fold-back current
• Six-state drive design with hall effect sensors for commutation
• Operates with brushless or brushed servo motors
• Several Brushless Servo motors are available from Compumotor providing up to 190 oz-in continous and 570 oz-in peak torque

Reliability

• Short circuit protected -- phase-to-phase and phase-to-ground
• Overvoltage circuitry protects the drive from large inertial loads
• Status/fault LED indicators to confirm proper operation
• Enclosed packaging reduces danger of environmental contamination
• Over temperature circuitry protects the drive from excess heat

Packaging

• Application-specific integrated circuit (ASIC) and surface mount technology minimize product footprint, overall package size, and increase product reliability
• Removable snap-on molded cover for convenient configu-ration and protection against contaminants
• Heat is dissipated through the mounting surface
• Install with only two screws (also provides grounding and captivates cover)
• Universally available standard 25-pin D connector
• Right-angle screw terminal allows side-to-side mounting, or Eurorack compatibility

Power

• Provides 6 Amps continuous current and 12 Amps peak current
• Single 24-75 VDC power supply input

Additional References

OEM670 Torque and Step and Direction Drive Specifications

Speed/Torque Curves for SM, SE, NeoMetric and J Series Motors

OEM670 and OEM675 Series Dimensional Drawings and OEM670X and OEM675X Drive Connections

OEMSD, OEM675SD, OEM670T and OEM675T Drive Connections

Ordering Information and Part Numbers