HIMA X-CPU-01 (HIMax System Core CPU, SIL3)

X-CPU-01 is the central processing unit (CPU) of the German HIMA HIMax (X series) safety instrumented system (SIS). The entire unit is SIL3 certified, 1oo2 redundant, and hot-swappable. It is responsible for executing safety logic, I/O scheduling, redundant switching, and safety communication. It is the core of safety systems such as ESD/BMS/FGS.

1. Basic Information

Model: X-CPU-01 (X-CPU01, Order Number: 940781)

Brand: HIMA (Black Horse)

Series: HIMax (X series)

Type: Safety CPU Module (1oo2 Redundancy)

Safety Level: IEC 61508 / IEC 61511 SIL3 (TÜV Certification)

Status: Brand new original, in stock, supports hot-swapping

Adapter Backplane: X-BASE-PLATE-10/15/18-01

Matching Connector Board: X-CB-001-01 (Including 4-port Ethernet Switch)

II. Hardware Core Parameters

Processor: Dual-core ARM Cortex-A53 / PowerPC (1oo2 Security Architecture) Memory:

Flash: 256 MB (program / event storage)

DRAM: 128 MB

NVRAM: Built-in (power-on data retention)

Program capacity: 1023 kB per user program, supports 32 parallel safety programs

Power supply: 24 VDC (‑15% ~ +20%), typical power consumption ≈ 15 W, current 1.4 A

Size (width × height × depth): 29.2 mm × 236 mm × 310 mm (19-inch rack slot)

Weight: ≈ 1.3 kg

Protection: IP20 (in cabinet)

Environment:

Operating temperature: –20 ℃ ~ +60 ℃

Storage temperature: –40 ℃ ~ +85 ℃

Humidity: 5%–95% without condensation

III. Redundancy and Safety (Critical)

Architecture: 1oo2 (two-out-of-one) hardware redundancy, dual-core interlocked self-check

Redundancy switching: Automatic non-disruptive switching, time < 50 ms, single failure does not affect operation

Safety mechanism:

Hardware-level mandatory fail-safe (Fail-Safe)

Comprehensive self-check + mutual check (period < 10 ms)

Fault automatic transition to safe state and record events

Authentication: SIL3, Cat.4, PL e (EN 954‑1 / ISO 13849‑1)

IV. Communication Interfaces (X‑CB‑001‑01 Connector Board)

Ethernet: 4 × 10/100/1000 Mbps (secure Ethernet SafeEthernet)

Protocols: Modbus TCP, PROFIBUS DP, SafeEthernet, TCP/IP

Serial ports: RS‑232 / RS‑485 (optional, for debugging / third-party communication)

System bus: Backplane high-speed safety bus (automatically connects I/O and power)

Redundant communication: Supports CPU redundancy + network redundancy, no single point of failure

V. Function Overview

Safety logic execution: Runs SIL3 safety programs such as ESD/BMS/FGS, supports ladder diagram / function block / structured text (ST)

I/O control: Manages the entire I/O modules (X‑AI‑01, X‑DI‑01, etc.), hot-swappable identification and configuration

Redundancy management: Dual CPU synchronous operation, data comparison, fault switching, throughout without disturbance

Events and diagnostics: Records CPU/I/O/communication events (timestamp ms level), supports online diagnosis and fault traceability

System monitoring: Real-time monitoring of power, fan, temperature, bus status, abnormal alarm and upload to the upper computer

VI. Typical Configuration (Required)

CPU: X‑CPU‑01 ×2 (1oo2 redundancy)

Backplane: X‑BASE‑PLATE‑18‑01 (18 slots)

Power supply: PS2000/230 ×2 (redundant)

Fans: K9203A ×2 (hot-swappable)

Connector board: X‑CB‑001‑01 ×2 (with CPU)

VII. Differences from Older Models (H41q/H51q) CPUs

X‑CPU‑01 (HIMax/X series): SIL3, 1oo2, hot-swappable, gigabit Ethernet, 4 network ports, new architecture, in stock

K‑CPU‑01 (H41q/H51q): SIL3, 1oo2, non-hot-swappable, 100 Mbps network, discontinued

VIII. Application Scenarios

Petroleum and Chemical Industry: ESD emergency stop, FGS fire and gas system, BMS combustion management

Electricity: Turbine / boiler protection, generator excitation control

Natural Gas: Long-distance pipeline cut-off, compressor protection Pharmaceuticals / Fine Chemicals: Reaction Vessel Safety Interlock, Explosion Protection