MOXA ICF-1280I-M-ST-T

Manufacturer: Moxa Inc. (Taiwan)

Product Brief: Converts a standard PROFIBUS DP RS-485 electrical segment to a fiber-optic link, providing galvanic isolation, noise immunity, and extended distance. Intended for connecting PROFIBUS masters/slaves across electrically noisy or geographically separated areas in industrial plants.

Category: Others

Description

Key Technical Specifications:

Model: ICF-1280I-M-ST-T (Multi-mode fiber, 2 × ST connectors, -40 to 75 °C operating range)
PROFIBUS Interface:
- 1 × DB9 female (RS-485, PROFIBUS DP pinout per IEC 61158)
- Baud Rate: 9.6 kbps to 12 Mbps (auto-detect)
- Bias & Termination: Selectable via DIP switch (120 Ω termination resistor)
Fiber Interface:
- 2 × ST connectors (Multi-mode)
- Wavelength: 820 nm
- Typical Link Budget: 14 dB
- Max Distance: ~ 4 km (multi-mode 62.5/125 µm)
Isolation: 2 kV built-in on serial side
Power Input: 12 – 48 V DC (dual redundant inputs), typical consumption < 5 W
Power Connector: Removable terminal block
Housing: Metal, IP30
Mounting: DIN rail (35 mm)
Dimensions: 39 × 115 × 70 mm (W × H × D)
Weight: ~ 225 g
Operating Temp.: -40 °C to +75 °C (Wide Temp. model — suffix T)
Standards:
- EMC: EN 55032 Class A, IEC 61000-4-2/3/4/5/6/8
- Safety: UL 60950-1, EN 60950-1
- Hazardous Area: Class I Div 2, ATEX / IECEx (where indicated on label)
MTBF: > 1,800,000 hrs (Telcordia SR-332)

Functional Features:

Transparent PROFIBUS protocol conversion — no addressing or configuration required
Link/test LEDs for fiber TX/RX and PROFIBUS activity
Redundant DC power inputs with reverse polarity protection
Supports point-to-point or redundant ring (if used in pairs) topologies

Application Scenarios: Extending PROFIBUS DP to remote skids, linking PLC and VFD/drive clusters across high-EMI areas (near VFD cabinets, welding zones), connecting plant floor to isolated analyzer houses.

Installation & Notes:

Set PROFIBUS termination DIP switch ON only at the physical ends of the RS-485 segment.
Use proper ST-type multimode patch cords; clean fiber ends before mating.
Ensure both ends of the fiber link use matching wavelength and fiber type.
Verify LED “Link” is solid green after connection; flashing indicates no partner detected.

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