Key Technical Specifications
- Product Model: F1DI1601
- Manufacturer: HIMA
- System Platform: HIMatrix Safety System
- Channels: 16 independent safety digital inputs (Group A + B, 8 channels each)
- Input Type: NAMUR (EN 60947-5-6) or dry contact, line-monitored (test pulses)
- Nominal Voltage: 24 VDC (18–30 VDC range)
- Input Current: 4.5 mA (ON), 1.5 mA (OFF) per channel
- Line Monitoring: Integrated short-circuit & open-circuit detection with diagnostic alarm
- Diagnostic Coverage: > 99 % (IEC 61508)
- Response Time: ≤ 8 ms (including safety reaction time)
- Safe Isolation: 500 VAC between groups and backplane
- Power Consumption: 3.5 W typical
- Operating Temperature: –25 °C to +70 °C (extended range with derating)
- Safety Integrity: SIL 3 (IEC 61508), SIL 4 capable in 1oo2D architecture, Category 4 / PL e (EN ISO 13849-1)
- Certifications: TÜV Rheinland SIL3, ATEX Zone 2 / IECEx, UL, CSA, FM Class I Div 2, Marine DNV-GL
- MTBF: > 1,200,000 hours (Siemens SN 29500 at 40 °C)
- Dimensions (W×H×D): 22.5 × 99 × 114 mm (standard HIMatrix slice)
Technical Architecture & Functional Positioning
The F1DI1601 is a core safety I/O component within the decentralized HIMatrix architecture. It operates in 1oo2D (one-out-of-two with diagnostics) internal structure: each of the 16 inputs is processed by two independent microcontrollers running diverse software. Discrepancies trigger immediate safe state transition and diagnostic reporting via safeethernet.
Line monitoring uses high-frequency test pulses that detect wire-break or short-circuit conditions within 5 seconds without interfering with sensor function. This satisfies the most stringent process industry requirements (e.g., emergency shutdown, fire & gas detection) where undetected field wiring faults are unacceptable.
In large distributed systems, multiple F1DI1601 modules communicate deterministically over HIMA’s proprietary safeethernet protocol with < 10 ms system reaction time, making it ideal for burner management (EN 50156), turbine control, and offshore ESD applications.
Typical Application Scenarios
- Burner management systems (BMS) according to EN 746-2 and NFPA 86 monitoring flame detectors, gas valves, and limit switches
- Emergency shutdown (ESD) systems in petrochemical plants with hundreds of safety pushbuttons and valve position feedbacks
- Fire & gas detection panels interfacing directly to NAMUR smoke and heat detectors
- High-integrity pressure protection systems (HIPPS) IEC 61511 with certified SIL3 final element monitoring
- Offshore platform wellhead safety instrumented systems requiring DNV-GL and ATEX certification
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