Proven performance



Maximum safety, scalable availability, highest cost-efficiency: since their launch, the H41q/H51q systems have become THE established standard for safe AND economical solutions in the processing industry.  H41q/H51q systems are ideal for small and mid-size safety-critical applications which require high levels of process availability. Success in these systems is based principally on three factors:

Absolute reliability

H41q/H51q systems are based on what has proven to be the world’s best safety technology. HIMA has installed more than 25,000 solutions and more safety systems than all of its rivals in the global processing industry . It’s the quality that has won the day.

Scalable availability

H41q/H51q systems offer the highest level of fault tolerance and therefore process availability. And the best thing is that HIQuad technology enables the systems’ fault tolerance to be adjusted individually, which means that cases of redundancy can always be set up specific to the application - making it more economical. Even in single-channel configurations - non-redundant, that is - the systems can be used up to SIL 3 without time limit.

High adaptive flexibility

H41q/H51q systems are extremely flexible and are easier and therefore efficient to adapt to individual application requirements.  

The H41q/H51q systems utilise the same broad range of I/O cards and are both programmed using

H41q/H51q - the Highlights

  • Maximum reliability
  • SIL3 even in single-channel configuration
  • Flexible redundancy management
  • Hot-swapping of modules
  • Online programm upgrades
  • Comprehensive, tried-and-tested range of I/Os
  • Easy to integrate into all DCSs
  • Safety-related networking via safeethernet.
  • Drag&Drop engineering
  • Proven 19-inch technology
  • For use in Ex-zone 2


Compact product information for download.


Success Story

Boiler management system
for Queen Mary 2