HIMA is globally recognized for its specialized Safety PLCs designed for SIL3-rated industrial applications. With decades of proven performance in petrochemical, power, and process industries, HIMA's modular architecture allows high flexibility, redundancy, and real-time diagnostics.
One major benefit I’ve personally experienced as an engineer is how seamlessly these modules integrate with various DCS platforms, making system upgrades and safety logic management significantly easier.
Central Processing Units: F8621A & F8650X
The F8621A CPU Module and F8650X are the brains of HIMA safety systems.
The F8621A is a compact, dual-processor unit ideal for SIL 3 redundancy.
The F8650X, on the other hand, is designed for high-performance applications with its extended memory and processing power.
In my projects, we often prefer the F8650X for turbine safety control and burner management systems due to its fast I/O scan times and advanced diagnostics.
I/O Modules for Diverse Field Signals
F3237 and F3236:
16-channel input modules with isolation and filtering features, perfect for monitoring pressure switches or contact inputs.
F3330:
This 8-channel output module is designed for safe actuator control, including emergency shutdown valves.
F6217:
An 18-channel digital input module that supports harsh industrial environments and offers fault detection per channel.
Choosing the right I/O module impacts the reliability of the whole safety loop. I always recommend F3236 for tight panel installations due to its compact profile and channel density.
Power & Distribution: F7126 and F7131
F7126 Power Supply Module:
Supplies stable voltage for CPU and I/O backplanes. Equipped with redundancy and failure monitoring.
F7131 Distribution Module:
Ensures proper load sharing and fault isolation. Often used in dual-channel redundant power schemes.
From a practical engineering standpoint, pairing F7126 with F7131 has prevented multiple plant shutdowns in offshore facilities I’ve supported.
Thermal & Rack Solutions: K9203 and B9302
K9203 Rack Fan Unit:
Essential for cooling in high-density module arrangements. It enhances the lifespan of surrounding electronics.
B9302 I/O Slot Rack:
A robust and compact mounting solution that fits multiple I/O modules, streamlining panel design and wiring.
I often advise including the K9203 in high-temperature applications, especially in refining units with continuous operations.
Redundancy & Communication: H51Q-HRS and F7553
H51Q-HRS:
This central module supports dual redundant CPUs, ideal for safety-critical zones.
F7553 Coupling Module:
Enables secure communication between main and remote racks in distributed systems.
For long-distance control logic spread over wide geographical areas, the F7553’s coupling reliability has been outstanding in my field experience.
Why Engineers Trust HIMA Modules
With over 20 years in automation, I believe HIMA stands out for three core reasons: modularity, long-term availability, and certified safety compliance (SIL 3 & SIL 4). The ability to mix CPUs, I/Os, power modules, and fans into a tailored safety system gives system integrators maximum flexibility without sacrificing reliability.
Final Thoughts
Each of the HIMA modules listed above is designed with precision and proven in real-world hazardous applications. Whether you’re designing a new ESD system or retrofitting a BMS, these modules—F3237, F8621A, K9203, and others—offer reliability, configurability, and peace of mind for engineers worldwide.