B4236-2 is a 19-inch 5U redundant bus system rack kit from the HIMA (Black Horse) H41q-HR series in Germany, used for building a SIL3-level highly available redundant safety control system.

Basic Information

Model: B4236-2

Brand / Series: HIMA / H41q-HR (compatible with H51q)

Type: System rack assembly kit

Safety level: SIL3, Cat.4, PL e (TÜV certified)

Bus architecture: Redundant system bus + Redundant CPU (high availability)

Rack body

Specification: 19-inch standard, 5U height (approximately 222 mm)

Model: K1409 System Sub-rack

Structure: Integrated cable trough, 4 K9212 fans, backplane Z1009

Installation: Standard 19-inch cabinet fixation

Weight: Approximately 3.5 kg

Standard configuration (complete system configuration)

1 × K1409: 5U system rack (including fans and backplane)

2 × F8652: Redundant Central Processing Module (CU)

2 × F7130A: Redundant Power Module (24/5 VDC)

2 × Z6011: Power decoupling and fuse module

1 × Z6012: Fan monitoring module

2 × Z6013: WD Signal Power Decoupling Module

1 × Z6007/Z6017: Jumpers

4 × K9212: Redundant cooling fans (with fault monitoring)

Core parameters

Operating voltage: 24 VDC (±10%, redundant power supply)

Power consumption: Approximately 80 W (full configuration)

Operating temperature: 0°C ~ +55°C

I/O capacity: Up to 7 I/O modules (redundant bus)

Protection level: IP20

Certifications: TÜV, CE, SIL3

Key features

Dual redundancy (bus + CPU): Both system bus and CPU are redundant, no single point of failure, availability higher than B4236-1

Integrated complete design: Rack, CPU, power supply, fans, power distribution all included, ready to use out of the box

Highly integrated 5U rack: 19-inch 5U height, saves cabinet space, compatible with standard cabinets

Complete self-diagnosis: Real-time fault monitoring of fans, power, CPU, bus, safe shutdown

Industrial-grade reliability: Wide temperature operation, strong anti-interference, suitable for high-risk scenarios such as petrochemicals, power, etc.

Typical applications

Petroleum and chemical ESD emergency stop system (high availability requirements)

Power plant / power station BMS combustion management, FSS furnace safety system

Natural gas / long-distance pipeline SIS safety instrumented system (key sites)

High-risk process equipment SIL3-level safety control platform (high reliability scenario)

Model differences (B4236-1 vs B4236-2)

B4236-1: H41q-H, single-channel bus, redundant CPU (cost optimization)

B4236-2: H41q-HR, redundant bus, redundant CPU (high availability)