TCL | ISTEC SpeedSys 200

Istec SpeedSys 200

The SpeedSys 200 is a SIL-rated overspeed detection system for rotating machinery. It delivers a robust layer of protection with a compact footprint. Its small robust design and low-impact installation enables advanced protection in a wide range of machinery.

Safe by design

The SpeedSys 200 is built with safety in the design rather than the conventional method of proven in use.
‘Proven in use’ requires years of usage data. Changes to the device will invalidate this data and the certification. ‘Safe by design’ allows for easy recertification after changes.


The module is designed for a wide range of applications. A single module can offer an economical and reliable solution for overspeed protection. Redundancy and voting structures can be created for more demanding applications or increased availability.

Typical applications include:

  • Micro turbines
  • Wind turbines
  • Compressors and pumps
  • Aeroderivative gas turbines
  • Gas and steam turbines
  • Marine applications

Istec SpeedSys 200

Design Concept

SpeedSys 200 is designed as an independent layer of protection; its purpose is to be simple and robust. The module delivers quick and reliable protection and complies to the industry standards.

Any configuration

The overspeed detection system is compatible with all sensor types and applicable in any environment, making it easy to install and retrofit.

Scalable system

SpeedSys 200 is modular and scalable to fit any application; from low impact stand alone configurations to multiple module voting structures for increased safety or availability.



Certified safety

SpeedSys 200 has been designed to meet the requirements for SIL 2 certified overspeed protection, featuring incredibly fast reaction times, cutting-edge self-monitoring with long test intervals and sufficient safety outputs.

Designed for versatility

The system has a small technical footprint that can be used in field enclosures or in control rooms, and industry standard in- and outputs for easy integration and retrofitting.

Isolated inputs

Isolated inputs eliminate the need for separate isolators or barriers in the field, reducing failure modes and increasing sensor monitoring functions.


System features

  • SIL 2 certified protection
  • 8 ms system response time
  • 2 safety relays + 1 safety analog output
  • Suitable for Hall-effect-, electromagnetic- or proximity sensors


  • ATEX/IECEx Zone 0,1,2 (Ex ia) isolated inputs
  • Advanced self-monitoring and diagnosis
  • 10 year proof-test interval (typical)
  • External voting for redundant configurations



  • API 670
  • API 612
  • IEC 61508, SIL 2