HIMA B4243

B4243 is a high-precision analog signal isolation module from the H41q/H51q series of HIMA (Black Horse) from Germany. It belongs to the SIL3 safety level I/O component and is used for electrical isolation and anti-interference of analog signals in safety instrumented systems (SIS).

Basic Information

Model: B4243

Brand/series: HIMA / H41q, H51q (compatible with HIMax system)

Type: Analog signal isolation module (single channel)

Safety level: SIL3, Cat.4, PL e (TÜV certified, IEC 61508)

Application: Special card for industrial safety system analog signal isolation, resistant to strong interference and high stability

Core parameters

Input signal: 0–10V DC (standard analog voltage)

Output signal: 0–10V DC (linearly corresponding after isolation)

Isolation voltage: 2500V DC (input/output/backplane three isolation)

Channel number: 1 channel (single-channel analog signal isolation)

Accuracy: ±0.1% (full scale, 25℃)

Operating temperature: -20℃ ~ +70℃ (wide temperature industrial grade)

Power consumption: ≤5W (24VDC supply)

Protection level: IP20

Size/weight: Standard HIMA card size, approximately 0.3kg

Key features

Three isolation design: Complete electrical isolation between input, output, and system backplane, blocking ground circulation and noise interference

High-precision linear conversion: Precise analog circuitry, no signal distortion or drift, suitable for high-precision measurement scenarios

Fault safety (Fail-Safe): When the module fails, the output defaults to 0V, complying with the principle of safe system power loss

Wide temperature and strong anti-interference: Stable operation at -20℃ ~ +70℃, resistant to EMI/RFI interference, suitable for harsh environments such as petrochemical and power plants

Hot-swappable support: Online replacement of modules does not affect system operation, reducing maintenance downtime

Typical applications

Petrochemical ESD system: Analog signal isolation (pressure, temperature, level) to prevent interference causing false interlocks

Power plant BMS/FSS system: Analog signal isolation for boilers / steam turbines, ensuring stable control of combustion and furnace safety

Natural gas long-distance pipeline SIS: Pressure / flow analog signal isolation to ensure reliable emergency shutdown logic

Coal chemical / metallurgical high-risk facilities: Anti-interference isolation of key process parameter analog signals to meet SIL3 safety requirements

Model differences (B4243 vs B4235)

B4243: Analog signal isolation (0–10V), 2500V isolation, SIL3, single channel

B4235: Digital signal isolation (5V logic), 1500V isolation, SIL3, multi-channel