I. Basic Information

Model: H4012 (H 4012)

Brand: HIMA (Germany)

Type: Safety-related Switch Amplifier (with line fault monitoring)

Safety Level: SIL3 (IEC 61508), Cat.4 (EN 954), PL e (ISO 13849)

Explosion-proof Certification: ATEX (Ex) - Intrinsically Safe

Installation: DIN rail installation (terminal box type)

Weight: Approximately 2kg

Status: In service, dedicated to explosion-proof safety circuit

II. Core Parameters

Input: (Ex) Intrinsically Safe Input, compatible with safety-tested proximity switches

Output: Relay Output (for line faults)

Monitoring Function: Dual monitoring of open circuit and short circuit faults

Operating Temperature: -20℃ ~ +60℃

Protection Grade: IP20

Power Supply: 24VDC (Redundant Input)

III. Key Functional Features

SIL3 Safety Certification: Meets IEC 61508 SIL3 standards, suitable for ESD, F&G, and explosion-proof safety circuits.

Intrinsically Safe Design: ATEX (Ex) i Certification, can be directly used in Zone 0/Zone 1 hazardous environments (chemicals, oil and gas).

Full-line Fault Monitoring: Built-in dual fault detection of open circuit and short circuit, when a fault occurs, the relay outputs an alarm signal.

Dual-channel Redundancy Architecture: Safety dual-channel design, with built-in self-check, fault-safe response.

Special Proximity Switch Compatibility: Specifically designed for safety-tested proximity switches, with reliable signal processing