Description
Product Overview
The HIMA F8650X is the central processing module for HIMA’s H51q safety-system architecture. HIMA’s certification documentation identifies revision 01 specifically as a safety-related central module for H51q-MS, H51q-HS, and H51q-HRS systems. That distinction matters during procurement: the F8650X is the processing core of a safety controller, not a conventional discrete or analog I/O module.
At the processor level, the HIMA F8650X uses two synchronized Intel 386EX 32-bit processors operating at 25 MHz. Published technical records identify 1 MB of operating-system Flash-EPROM, 1 MB of user-program Flash-EPROM, and 1 MB of data SRAM for each processor. The module also provides two electrically isolated RS-485 interfaces, a four-digit diagnostic display, and a safety-related watchdog output. Its operating requirement is documented as 5 V / 2 A, with the module occupying 8 SU in the H51q system architecture.
For maintenance engineers, the important point is system compatibility rather than processor speed. HIMA’s documentation separates the F8650X from related central modules such as F8652X, which belongs to the H41q family. Likewise, F8627X and F8628X are communication modules rather than substitutes for the central processor.
The H51q/H41q central-module family entered HIMA’s Legacy phase in April 2020, according to available HIMA lifecycle information. That makes revision control, safety validation, and replacement planning particularly important for existing installations.
Product Introduction
A failed central module in a safety controller is not a normal PLC card replacement. The F8650X sits at the center of the H51q processing architecture, so the replacement must match the installed system family, hardware revision, operating-system requirements, and safety configuration.
For a legacy H51q replacement, confirm the exact module marking before procurement. F8650X revision 01 is explicitly documented for H51q-MS, H51q-HS, and H51q-HRS systems; do not substitute an F8652X simply because the two models look similar.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | |
| Manufacturer / Brand | HIMA Paul Hildebrandt GmbH |
| Product Type | Safety-related central module |
| System Platform | H51q |
| Supported System Families | H51q-MS, H51q-HS, H51q-HRS |
| Documented Revision | Revision 01 |
| Processor Architecture | Dual processor |
| Processor | Intel 386EX |
| Processor Architecture | 32-bit |
| Clock Frequency | 25 MHz |
| OS Memory | 1 MB Flash-EPROM per processor |
| User Program Memory | 1 MB Flash-EPROM per processor |
| Data Memory | 1 MB SRAM per processor |
| Serial Interfaces | 2 × RS-485 |
| RS-485 Isolation | Electrically isolated |
| Diagnostic Display | Four-digit matrix display |
| Watchdog Output | 24 VDC, loadable up to 500 mA |
| Watchdog Protection | Short-circuit protected |
| Operating Supply | 5 VDC / 2 A |
| Rack Space | 8 SU |
| Safety Classification | Safety-related; certification documentation applies to specified H51q configurations |
| Installation | H51q system rack/backplane |
| Communication Expansion | Via compatible H51q communication modules |
| Operating Temperature | Not independently verified from the primary documentation reviewed |
| Protection Rating | Not independently verified from the primary documentation reviewed |
The published technical data above should be distinguished from marketing claims found on reseller pages. In particular, exact SIL applicability and firmware compatibility should be checked against the installed H51q configuration and applicable HIMA certification documentation, rather than inferred solely from the part number. HIMA’s revision list confirms the safety-related classification and supported H51q system families.
F8650X
Related Products
- HIMA F8650 — Earlier related H51q central-module family. Hardware revision and cooling configuration should be checked before considering an as a replacement or vice versa.
- HIMA F8650A — Related H51 central-module variant; not automatically interchangeable with .
- HIMA F8650E — Another related H51 central-module variant requiring configuration-specific verification.
- HIMA F8652X — Central module for H41q-MS, H41q-HS, and H41q-HRS systems. It is a related product, but not a direct H51q substitute.
- HIMA F8627X — Communication module used with H51q architectures; it is not the central processor.
- HIMA F8628X — PROFIBUS-DP communication module in the H51q family; its function is communications rather than central processing.
- HIMA F6217 — Safety-related analog input module for H41q/H51q systems; represents the I/O layer rather than the central processing layer.
- HIMA F6220 — Safety-related Ex(i) thermocouple input module used within H41q/H51q systems.
FAQ
What is the HIMA ?
It is a safety-related central module for HIMA H51q systems, providing the main processing function for H51q-MS, H51q-HS, and H51q-HRS configurations.
Is an I/O module?
No. It is the central processing module. I/O functions are provided by separate HIMA modules installed within the safety-system architecture.
What processors does the use?
The documented configuration uses two Intel 386EX 32-bit processors at 25 MHz. Each processor has dedicated operating-system Flash-EPROM, user-program Flash-EPROM, and data SRAM.
Does provide Ethernet?
Not through a native Ethernet port on the central module. Ethernet communication in the H51q architecture is associated with compatible communication modules such as F8627X.
Can I replace an with an F8652X?
Do not treat them as direct substitutes. HIMA’s revision documentation identifies for H51q systems and F8652X for H41q systems. The installed system family must be confirmed first.
Does support firmware V3.1?
A generic “V3.1” statement cannot be confirmed from the sources reviewed. HIMA maintains separate device and firmware revision documentation, so firmware compatibility should be checked against the exact H51q operating-system version and hardware revision rather than assumed.
Can I hot-swap the ?
Do not assume hot-swapping is permitted. This is the central processing element of a safety-related controller. Replacement should follow the site’s approved shutdown, configuration restoration, proof-test, and safety-validation procedure.
What should I verify before purchasing a replacement?
Confirm the complete designation, hardware revision, installed H51q system type, operating-system revision, diagnostic/display condition, and any configuration or application data that must be restored. For a safety-system replacement, physical compatibility alone is not sufficient.
Is New Surplus acceptable for a legacy H51q system?
Potentially, but condition verification should be stricter than for an ordinary PLC module. Record the module identification and revision, inspect connectors and boards, verify the diagnostic display, and perform the required functional and safety checks before returning the system to service.
