The ANAFAZE 204-C20000DF is a specialized dual-channel fiber optic input/output (I/O) interface module engineered for high-reliability industrial communication in electrically noisy or hazardous environments. Designed to provide galvanically isolated, high-speed data transmission between control systems—such as DCS, PLCs, or RTUs—the ANAFAZE 204-C20000DF converts electrical signals into optical pulses using multimode fiber technology, effectively eliminating ground loops, electromagnetic interference (EMI), and voltage surges that commonly disrupt copper-based networks. This makes it particularly valuable in power generation, transmission substations, oil & gas facilities, and heavy manufacturing where signal integrity over distance is non-negotiable.
As part of ANAFAZE’s 200-series modular I/O platform—widely deployed in legacy and modernized automation infrastructures—the ANAFAZE 204-C20000DF supports two independent fiber channels, each capable of point-to-point communication up to 2 kilometers using standard 62.5/125 µm or 50/125 µm multimode fiber. The module features industry-standard ST or SC connectors (depending on configuration) and integrates status LEDs for real-time link and activity monitoring. Its compact, DIN-rail mountable design allows seamless integration into existing control panels alongside other ANAFAZE I/O modules, while its wide operating temperature range and conformal coating ensure resilience in extreme conditions. The ANAFAZE 204-C20000DF thus serves as a critical enabler of secure, noise-immune data exchange in mission-critical control loops where downtime is unacceptable.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 204-C20000DF |
| Manufacturer | ANAFAZE Corporation |
| Product Type | Dual-Channel Fiber Optic I/O Interface Module |
| Number of Channels | 2 (independent) |
| Fiber Type | Multimode (62.5/125 µm or 50/125 µm) |
| Wavelength | 850 nm (typical for multimode) |
| Maximum Distance | 2 km (6,560 ft) |
| Data Rate | Up to 10 Mbps per channel (application-dependent) |
| Connectors | ST or SC (field-configurable or factory-set) |
| Power Supply | +5 VDC or +24 VDC (varies by system backplane) |
| Operating Temperature | -40°C to +85°C |
| Dimensions (W × H × D) | 35 mm × 120 mm × 100 mm (approx.) |
| Mounting | DIN rail (EN 50022 compliant) |
| Isolation Voltage | >2500 V RMS (channel-to-channel and to ground) |
Main Features and Advantages
Complete electrical isolation is the cornerstone of the 204-C20000DF’s value proposition. By converting electrical control signals into light pulses transmitted over glass fiber, the module breaks conductive paths between devices, preventing damage from lightning-induced transients, switchgear arcs, or ground potential rise—common in utility and industrial sites. This isolation also eliminates data corruption caused by EMI from large motors, VFDs, or radio transmitters, ensuring deterministic communication even in the noisiest environments.
Dual independent channels enhance system flexibility and redundancy. Each channel on the 204-C20000DF operates autonomously, allowing one to serve as a primary data path while the other acts as a backup, or to connect separate subsystems (e.g., turbine control and generator protection) without cross-interference. The module’s low propagation delay (<1 µs typical) preserves real-time responsiveness, making it suitable for fast interlocking or synchronization tasks. Visual diagnostics via front-panel LEDs—indicating power, fiber link status, and data activity—enable rapid troubleshooting without specialized tools.
Robust mechanical and environmental design ensures long-term field reliability. The 204-C20000DF is built with industrial-grade components, often featuring conformal coating on PCBs to resist moisture, dust, and chemical exposure. Its passive optical design contains no fans or moving parts, minimizing failure points. Compatibility with ANAFAZE’s modular backplane architecture allows hot-swapping in supported systems, reducing maintenance windows. For engineers maintaining aging control systems or designing new installations in high-risk zones, the 204-C20000DF delivers a proven, future-ready solution for noise-free, secure signal transmission.
Application Field
The 204-C20000DF excels in applications where electrical isolation and signal fidelity are paramount. In electrical power substations, it connects protective relays, bay controllers, and SCADA gateways across different ground grids, preventing false tripping during fault events. Within combined-cycle power plants, the 204-C20000DF links distributed control system (DCS) I/O to remote turbine or boiler sensors located hundreds of meters away—immune to the intense EMI generated by high-voltage transformers and rotating machinery.
In oil & gas processing facilities, especially offshore platforms, the module enables safe communication between fire & gas detection panels and central control rooms, meeting stringent intrinsic safety and explosion-proof requirements through its passive optical nature. Similarly, in mining operations, the 204-C20000DF transmits conveyor belt status or ventilation control signals across long tunnels where copper cables would suffer from attenuation and induced noise. For legacy system sustainment, many nuclear and hydroelectric plants continue to rely on ANAFAZE I/O architectures, and the 204-C20000DF remains a critical spare for maintaining these certified control schemes without costly full-system migration. Whether used for new builds or life-extension programs, the 204-C20000DF provides a dependable optical backbone for industrial automation.
Related Products
204-C10000DF: Single-channel version of the same fiber module; ideal for lower-density applications.
204-C20000SF: Single-mode fiber variant offering extended reach (up to 20 km) for wide-area plant networks.
202-E10000: Electrical (copper) I/O base module in the same 200-series platform—used alongside fiber units.
208-PWR24: Dedicated 24VDC power supply module for ANAFAZE 200-series racks housing the 204-C20000DF.
206-RACK4: 4-slot DIN rail chassis designed to hold 204-C20000DF and other 200-series modules.
ANAFAZE FIBER-KIT-ST: Field-installable ST connector kit for custom fiber patch cables compatible with the 204-C20000DF.
204-C20000DF-RED: Redundant dual-fiber configuration (if available) for ultra-high-availability control loops.
Installation and Maintenance
Pre-installation preparation: Before installing the 204-C20000DF, verify compatibility with the host ANAFAZE backplane or carrier system, confirming correct power voltage (+5V or +24V) and slot addressing. Inspect fiber cables for cleanliness and integrity—contaminated or bent fibers can cause link failure. Use only multimode fiber rated for 850 nm operation within the 2 km limit. Ensure connectors (ST or SC) are fully seated and latched; loose connections lead to intermittent faults. When routing fiber, maintain bend radius >30 mm to avoid microcracks and signal loss.
Maintenance recommendations: The 204-C20000DF requires minimal routine maintenance due to its solid-state, passive optical design. However, periodically inspect fiber connector end-faces with a scope for dust, oil, or scratches, and clean using approved fiber cleaning tools if needed. Monitor the front-panel LEDs: a dark “Link” LED indicates broken fiber or misalignment, while flickering may suggest marginal signal strength. Avoid exposing the module to condensation during rapid temperature changes; if installed in outdoor enclosures, use desiccant packs. Should replacement be necessary, handle the 204-C20000DF with ESD precautions and store spares in anti-static packaging. Never look directly into active fiber ports—use a power meter for diagnostics.
