Powerful, Functional, Modular Connectivity

Available in four power levels, all with integral power supplies and shunt regulators, these fully digital brushless servo drives provide transformerless, direct 120/240V ac line operation. These high performance drives use a single DSP (Digital Signal Processor) to close the current, velocity and position loops to provide smooth, high performance servo control. A single rugged resolver feedback reduces wiring to one feedback device for commutation, velocity and position information. All system and application parameters are set digitally to insure repeatability and to eliminate drift. The combination of DSP, DRDC (our Digital Resolver-to-Digital Conversion) and ASICs (Application Specific Integrated Circuits) provides the digital advantage to reduce component count, increase reliability and flexibility, eliminate analog drift and imprecise pot adjustments, while reducing overall size.

A modular design increases functionality and the open architecture ensures that your investment can be upgraded as additional functional enhancements become available. The foundation for this series is a base drive which, in itself, has an impressive list of features and functions. For example, a variety of analog and digital command interfaces are available. The base drive accepts various option cards that provide increased application-specific functionality. Option cards provide three separate functions: a RS232/485 serial interface, a SERCOS multi-axis fiber optic interface and a programmable single axis controller. Connectivity through option cards provides the foundation for future upgrade paths. Three option cards are available.

An autotuning feature automatically sets the servo system set-up parameters to the type of performance desired. Use just a personal computer to set-up your system, no scopes, meters or other instruments are required.

Base Drive Functionality

• Standard Analog and Digital Interface
  • +/- 10V analog interface
  • step-direction digital interface
  • step up/step down interface
  • quadrature encoder interface
• Digital Analog I/O
  • six mappable digital bi-directional I/O
  • two analog outputs
  • one analog input
  • quadrature encoder output
• Clutch/Brake Emulation
• Electronic Gearing with User-Defined Ratios
• Multiple Adjustable Speed Presets
• User-Defined Acceleration Rate
• User-Defined Start/Stop Commands
• Full Line of Option Cards to Expand Functionality and Extend Product Life

Sample Model Number Code

This chart identifies the components of a typical model number code for SC900 Base Drives.

NOTE: Base Servo drive includes Information Sheet. Manual and accessories ordered separately or included by using the Accessories Option designator.

Option Cards

OC930 Serial Interface Option Card
	RS-232/485 serial interface Access drive from a PC during set-up Facilitates all-digital set-up of current, velocity and position loops Serves as a vehicle for field firmware upgrades Data can be stored on option card or in drive
OC940 SERCOS Interface Option Card
	SERCOS Interface - the only open architecture network specifically designed for motion control, synchronous multi-axis protocol Fiber optic connection - speeds and simplifies connections, eliminates complex wiring, immune to external electrical noise, cable lengths up to 100 m between drive and controller possible Eight optically-isolated inputs Eight optically-isolated outputs Torque, velocity and position servo loops are closed locally at the drive
OC950 Programmable Single Axis Position Control Option Card
	New Windows(R) development environment - powerful interactive diagnostics ServoBASIC Plus(TM) programming software - eight software-configurable limit switches, full math capabilities, high speed interrupt driven software, cam profiling, popular PLC and HMI protocols available Twenty-one programmable and configurable I/O - connects with Opto 22 Optional PacLAN(TM) local area network - connect up to 255 drives, 2.5 Mbaud ArcNet compatible 32 kBytes NV memory, 128k optional program storage memory