Moxa ICF-1280I-M-ST Industrial PROFIBUS to Multi-Mode Fibre Converter with Redundant Ring (ST)

Overview

The Moxa ICF-1280I-M-ST is an industrial PROFIBUS-to-fibre converter with redundant fibre ring topology support, extending PROFIBUS DP communication over multi-mode optical fibre up to 4 km. The ICF-1280I builds on the ICF-1180I foundation with two critical additions: a redundant ring mode that provides zero recovery time on fibre link failure, and a Remote Fiber Diagnosis function that allows network-wide fibre inspection from any single converter without requiring on-site access to every unit. Like the ICF-1180I, the PROFIBUS fail-safe function prevents noise from a failed bus segment propagating through the fibre link to other segments.

Key Features

• Redundant fibre ring topology with zero recovery time on link failure
• Extends PROFIBUS DP up to 4 km with multi-mode fibre (ST connector)
• Remote Fiber Diagnosis: inspect entire ring topology from any single converter
• PROFIBUS fail-safe: isolates noise from failed bus segments, preserves other segments
• Fibre link monitor with LED and relay alarm on communication error
• Fibre Signal Intensity Diagnosis for aging and limit-value monitoring via voltmeter
• Auto baudrate detection (9.6 kbps to 12 Mbps); manual DIP switch override
• 2 kV galvanic isolation on PROFIBUS port
• Dual redundant 12–48 VDC power inputs
• Relay alarm output
• ATEX, C1D2, IECEx, and DNV maritime certified
• DIN-rail mountable metal housing (IP30)
• 5-year warranty

Redundant Ring & Remote Diagnosis

In redundant ring mode (configured via DIP switch), all ICF-1280I converters form a closed fibre ring. If any fibre segment fails, traffic is automatically rerouted around the ring with zero recovery time and no packet loss. The Remote Fiber Diagnosis function can identify the Tx or Rx side causing a problem on any converter in the ring, and detect fibre cable abnormalities at non-adjacent segments — all from a single local converter.

PROFIBUS & Fibre Interface

The PROFIBUS port uses a DB9 female connector supporting 9.6 kbps to 12 Mbps PROFIBUS DP with 2 kV galvanic isolation. The multi-mode fibre interface uses 100BaseFX ST connectors (50/125 µm (800 MHz) or 62.5/125 µm (500 MHz)). Wavelength is 820 nm, TX -14 dBm, RX sensitivity -28 dBm, link budget 14 dB.

Power & Environmental

Powered via terminal block with two independent 12 to 48 VDC inputs drawing 370 mA. Standard operating temperature is 0 to 60°C; -T variants extend this to -40 to 75°C. Ambient humidity 5 to 95% non-condensing. Metal IP30 housing, 225 g, DIN-rail mountable.

Certifications

IEC 60950-1, UL 508, EN 55032/35, CISPR 32, FCC Part 15B Class A, ATEX, Class I Division 2, IECEx, DNV maritime, CE. MTBF: 1,870,854 hours (Telcordia/GB).