Key Technical Specifications
- Product Model: F-TOP01 984900100
- Manufacturer: HIMA
- System Platform: HIMax XMR
- Optical Interface: 1000Base-SX, 850 nm VCSEL, multimode 50/125 µm or 62.5/125 µm
- Transmission Distance: 550 m on 50 µm MMF, 275 m on 62.5 µm MMF (optional single-mode version up to 30 km)
- Connector Type: Duplex LC, hot-pluggable SFP cage
- Data Rate: 1.25 Gbit/s full-duplex safeethernet (HIMA proprietary safety layer)
- Latency: < 3 µs added (electrical-to-optical + optical-to-electrical)
- Redundancy: Supports ring or line topology with automatic switch-over < 10 ms
- Diagnostic Functions: Optical power monitoring (Tx/Rx), link status, temperature, SFP presence detection reported via safeethernet
- Power Consumption: 2.5 W typical
- Operating Temperature: –20 °C to +60 °C
- Fiber Safety: Class 1 laser product (IEC 60825-1), eye-safe under all conditions
- Certifications & Standards: IEC 61508 SIL 3 (communication link), CE, ATEX Zone 2, TÜV type-approved for safety-related fiber transmission
- MTBF: > 2,100,000 hours
Technical Architecture & Functional Positioning
The F-TOP01 is the only HIMA-certified module that allows safeethernet to leave the electrical domain while preserving full SIL 3 integrity end-to-end. It is not a simple media converter: the module implements the complete HIMA safety protocol stack in hardware and continuously monitors optical budget, bit error rate, and link integrity. Any degradation triggers a controlled safe state in the affected communication path.
In large plants, multiple HIMax racks are often distributed across fire zones or buildings. The F-TOP01 enables deterministic, low-latency, fault-tolerant networking over fiber rings with automatic reconfiguration — eliminating copper limitations and electromagnetic interference problems common in refineries and offshore platforms.
Typical Application Scenarios:
- Applied in refinery-wide integrated ESD systems connecting central control room racks with field racks over several hundred meters of fiber
- Used in LNG tank farms for remote I/O placement outside hazardous areas while maintaining < 20 ms total safety reaction time
- Deployed on offshore platforms linking topside and hull-mounted HIMax systems through fiber penetrations
- Serves as backbone for multi-rack fire & gas systems requiring galvanic isolation and lightning immunity
- Utilized in tunnel and metro safety systems where copper runs exceed permissible length
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