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Sauer-Danfoss — Series of PLUS+1™ Compliant Safety Controllers

By Stacy Combest | August 22, 2012

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Sauer-Danfoss PLUS+1TM Compliant safety controllers offer outstanding functional safety capabilities to OEM designers of mobile off-highway vehicles worldwide. Designated SC024-010, SC024-020 and SC050-020, these devices simplify and streamline the application process, facilitating easier compliance with stringent functional safety standards. The three Sauer-Danfoss safety controller variants help vehicle manufacturers meet European Machinery Directive 2006/42/EC and are designed to achieve SIL 2 (Safety Integrity Level 2 according to IEC 61508) and PL-d (Performance Level d per ISO 13849-1) standards, with third-party certification pending.

The safety controllers join the flexible, powerful, expandable and growing PLUS+1 family of mobile machine management products, which integrate seamlessly through industry-renowned application expertise, offering accelerated mobile machinery development and time to market.

The Sauer-Danfoss safety controllers update three higher volume Sauer-Danfoss controllers to add improved functional safety capabilities. Each programmable device is a single controller module that includes two independent microprocessors with redundant control of each output. Integral safety layer software provides automatic fault detection monitoring, and enables programming of application-specific responses to fault conditions.  The design architecture facilitates use of the primary microprocessor for non-safety-critical applications, isolating control of safety functions in the secondary or safety microprocessor. The GUIDE-programmable devices are pin-for-pin compatible with equivalent Sauer-Danfoss MC controllers, requiring no wiring changes to transition from the standard controller to a safety controller.

The safety controller series features enhanced performance derived from the logical incorporation of state-of-the-art electronic technology. Upgrades include a larger memory capacity, higher environmental performance and enhanced input/output flexibility. The primary controller offers 512K of flash memory, while the secondary controller provides 128K of flash memory. The devices’ operating temperature range has been increased to 85 degrees C. Some multifunction inputs can now read 4-20 mA current, and digital inputs are now digital/analog to facilitate smart digital inputs. The frequency range of PWM outputs has been expanded to 33-4,000 Hz or 20,000 Hz and supports separate PWM frequencies per channel.

Additional enhancements include:

  • Configurable sensor power featuring a selectable range from 3-12 volts
  • A 150 V/m EMI/RFI rating
  • A lower power mode enabling application software to command internal power supplies to shut down when the controller is idle
  • The capability of running on as low as 7 volts, providing the ability to stay on consistently through engine crank

Sauer-Danfoss offers a team of subject matter experts with expertise in the development of OEM customer strategies to achieve functional safety compliance. Sauer-Danfoss can contribute by providing technical input, integrating products to develop subsystems and solutions, and offering information about the functions and reliability characteristics of such product assemblies.

Sauer-Danfoss
www.sauer-danfoss.com

Motion Control Tips


Filed Under: Motion Control Tips
Tagged With: Sauer-Danfoss
 

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