Product Overview
The HIMA F8652X is a high-integrity central module (CPU) that forms the computational heart of the HIMA H51q series Programmable Electronic System (PES), a fault-tolerant safety controller purpose-built for emergency shutdown (ESD), safety instrumented system (SIS), and burner management system (BMS) duties in the process industries. Positioned within HIMA’s第三代 HIQuad architecture, the HIMA F8652X implements a Quadruple Modular Redundant (QMR) structure: four independent microprocessors execute the safety application in lockstep, with every external memory and I/O access compared by testable hardware comparators. Any disagreement forces the affected channel into a predefined safe state, while the remaining healthy channels carry the load without process interruption. This design delivers the 1oo2D (one-out-of-two, diagnostic-covered) architecture that underpins AK6 / SIL 3 capability, giving operators both the safety integrity and the availability that continuous-process plants demand.
In practice, the HIMA F8652X is mounted in the central rack of an H51q-HRS or H51q-M system, where it receives process data from the distributed I/O subracks, executes the certified function blocks and interlock logic, and drives the safety outputs. Two CU (central unit) cards, each carrying two processors, make up one HIMA F8652X central unit; together they form a 4-2-0 degradation path — four processors running, then two after a CU fault, then a safe stop only if the second CU also fails. The module runs the ELOP II / SILworX engineered user program from Flash-EPROM, retains volatile data in battery-backed sRAM, and communicates with the DCS, historians, and asset management systems through the system communication interfaces. For asset owners, the HIMA F8652X represents a proven, certifiable, long-life platform: its I/O layer is preserved in the HIQuad X migration path, so a field installed decades ago can be modernized without rewiring the field.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | HIMA F8652X |
| Manufacturer | HIMA Paul Hildebrandt GmbH + Co KG |
| Product Type | Central Module / Safety CPU (QMR) |
| Platform / Series | HIQuad H51q PES, 3rd generation central module |
| Redundancy Architecture | Quadruple Modular Redundant (QMR), 1oo2D per CU |
| Microprocessors | 4 × clock-synchronous microprocessors (2 per CU card) |
| Program Memory | Flash-EPROM, min. 100,000 write/erase cycles |
| Data Memory | sRAM, battery-backed for retention |
| Backup Battery | Lithium battery CR2477N (HIMA p/n 440000018) |
| System Bus / Interfaces | I/O bus, DPR (dual-port RAM), redundant CU link |
| Communication | System communication module interface; SafeEthernet / PROFIBUS DP-V1 capable via comms modules |
| Diagnostic Display | 5-digit alphanumeric LED (status, fault codes, MONO / STOP) |
| Hot-Swap Capability | Yes — module can be pulled under power (triggers alarm; in redundant pair the healthy CU continues) |
| Safety Integrity | IEC 61508 / IEC 61511, SIL 3 capable; AK6 |
| Operating Temperature | -40 °C to +85 °C (module), 0 °C to +60 °C (rack ambient typical) |
| Installation | 19-inch central rack, DIN/subrack guided insertion, keyed slot |
