Istec SpeedSys 200

SpeedSys 200 is a SIL-rated overspeed detection system for rotating machinery. It delivers the core layer of protection with a compact architecture. Its small technical footprint and low-impact installation enables advanced protection to a wide range of applications.

For SIL 3 applications visit the SpeedSys 300 page »

For non-SIL applications, check out the SpeedSys tachometer series »

Safety by design

The simple and robust design of SpeedSys 200 meets the latest safety standards, and features easy maintenance and long proof test intervals.

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.

“Game changing innovation for SIL rated overspeed protection

Design concept

SpeedSys 200 is designed as an independent layer of protection; to be fundamentally simple and robust. It delivers fast and reliable protection for speed and acceleration and complies to the industry standards.

A separate monitoring module can be added to include extensive monitoring and connectivity features to the configuration. 




The system architecture is designed to suit a wide range of applications. A single module can offer a reliable and economical 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


Certified safety

SpeedSys 200 has been designed to meet the requirements for SIL 2 certified overspeed protection, featuring fast reaction times, advanced 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


Online training

Follow our online video training to fully understand the SpeedSys 200 and its software. The training includes short videos covering the installation, connectors, configuration, and a comprehensive overview of the software.

This training provides an accessible way to familiarize yourself or your team with the Istec SpeedSys 200 overspeed detection system.

You can find the training on the Istec Academy » 

Buy at the Istec shop

Buy SpeedSys 200 easily online via our webshop

Buy online

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