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ICF-1280I Series

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Industrial PROFIBUS-to-fiber converters with redundant fiber ring

Product Feature

  • Redundant fiber ring with zero recovery time
  • Examines network-wide fiber communication from a single converter
  • Auto baudrate detection and data speed of up to 12 Mbps
  • PROFIBUS fail-safe prevents corrupted datagrams in functioning segments
  • Alarm by relay output
  • 2 kV galvanic isolation protection
  • Dual power inputs for redundancy
  • Extends PROFIBUS transmission distance up to 45 km
  • Wide-temperature model available for -40 to 75°C environments
  • Supports Fiber Signal Intensity Diagnosis


The ICF-1280I industrial PROFIBUS-to-fiber converters are used to convert PROFIBUS signals from copper to optical fiber. The converters are used to extend serial transmission up to 4 km (multi-mode fiber) or up to 45 km (single-mode fiber). The ICF-1280I Series provides 2 kV isolation protection for the PROFIBUS system and dual power inputs to ensure that your PROFIBUS device will perform uninterrupted.


Remote Fiber Diagnosis

Optical fiber cables are often deployed for long-distance communication and a fiber-optic inspection pen is used by engineers to ensure proper communication quality of the fiber cable. The ICF-1280I Series eliminates the need for a fiber-optic inspection pen by providing a Remote Fiber Diagnosis function that uses DIP switch adjustments.

There are two major functions provided by Remote Fiber Diagnosis: (1) determining which side (Tx or Rx) is causing the problem on the converter; (2) examining the fiber connections for the overall topology from any individual converter. Fiber cable abnormalities can be automatically detected and identified by the LED indicator even if it is not adjacent to the converter. Remote Fiber Diagnosis facilitates fiber cable deployment and management, and also significantly shortens troubleshooting time by examining fiber connections for the overall topology from any individual converter.


Redundant Ring

The ICF-1280I Series of converters can connect PROFIBUS devices in a redundant fiber ring topology. Use the DIP switch to configure all the ICF- 1280I converters to redundant ring mode. When a PROFIBUS master transmits a signal from one converter to the PROFIBUS slave devices, this signal will travel to all the converters around the ring until it returns to the original converter and terminate. The redundant ring structure ensures no packet loss with zero recovery time.


PROFIBUS Fail-safe

Electrical noise may be generated when a PROFIBUS device malfunctions or the serial interface fails, resulting in bus failure. Traditional media converters transmit noise signals through the fiber wire to the other converter. This not only disrupts data communication between the two buses, but will also bring communication across the entire system to a halt. When this occurs, the engineers will not be able to easily locate the failed device because the entire PROFIBUS network is down. To avoid this situation, the ICF-1280I Series has a mechanism to detect and recognize noise signals. If the bus fails on one side, the noise signal will not propagate through the ICF-1280I converter and affect additional bus segments. In addition, the ICF-1280I converter will also trigger an alarm to provide the location of the failure to the field engineer.


Auto/Manual Baudrate Settings

The ICF-1280I converters convert signals back and forth between PROFIBUS and fiber at baudrates between 9.6 kbps to 12 Mbps. Engineers do not need to know the baudrate of the connected PROFIBUS device; the ICF-1280I converters can automatically detect the baudrate of the PROFIBUS device and apply this baudrate directly. This is an extremely convenient feature. If necessary, baudrates can be set to a fixed value via DIP switches to shorten the baudrate detection period when the system initializes.


Fiber Link Monitor

The ICF-1280I converters support a fiber link monitoring function to detect communication errors on both sides of the fiber connection and determine which side (Tx or Rx) is causing the problem. When a communication error occurs, a red LED status indicator will turn on and the relay alarm will activate. If a fiber abnormality occurs at a remote fiber segment, the Fault LED will flash to indicate the abnormality was in the remote segment. Engineers can use the fiber test function for troubleshooting.


Fiber Signal Intensity Diagnosis

In some circumstances, you may need to measure the receive level of the fiber-optic port with a voltmeter, which can be connected while the device is operating (doing so will not affect data transmission). The measurement can be taken with a voltmeter and read on a PLC that uses floating high impedance analog inputs, which allow you to do the following:

  • Record the incoming optical power for later measurement (e.g., to indicate aging or damage).
  • Carry out a good/bad test (limit value).

Serial Interface

Optical FiberICF-1280I-M-SC Series: 100BaseFX ports (multi-mode SC connector)
ICF-1280I-M-ST Series: 100BaseFX ports (multi-mode ST connector)
ICF-1280I-S-SC Series: 100BaseFX ports (single-mode SC connector)
ICF-1280I-S-ST Series: 100BaseFX ports (single-mode ST connector)
100BaseFX ports (multi-mode SC connector)
100BaseFX ports (single-mode SC connector)

PROFIBUS Interface

Baudrate9600 bps to 12 Mbps
ConnectorDB9 female
Industrial ProtocolsPROFIBUS DP
Isolation2 kV (built-in)
No. of Ports1

Power Parameters

Input Current370 mA @ 12 to 48 VDC
Input Voltage12 to 48 VDC
No. of Power Inputs2
Overload Current ProtectionSupported
Power ConnectorTerminal block (for DC models)
Power Consumption370 mA @ 12 to 48 VDC

Physical Characteristics

IP RatingIP30
Dimensions39 x 115 x 70 mm (1.54 x 4.53 x 2.76 in)
Weight225 g (0.49 lb)
InstallationDIN-rail mounting

Environmental Limits

Operating TemperatureStandard Models: 0 to 60°C (32 to 140°F)
Wide Temp. Models: -40 to 75°C (-40 to 167°F)
0 to 60°C (32 to 140°F)
-40 to 75°C (-40 to 167°F)
Storage Temperature (package 
-40 to 75°C (-40 to 167°F)
Ambient Relative Humidity5 to 95% (non-condensing)

Standards and Certifications

EMCEN 55032/24
EMICISPR 32, FCC Part 15B Class A
EMSIEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
IEC 61000-4-4 EFT: Power: 0.5 kV
IEC 61000-4-5 Surge: Power: 0.5 kV
IEC 61000-4-6 CS: 3 V
IEC 61000-4-8 PFMF
Environmental TestingIEC 60068-2-1
IEC 60068-2-2
IEC 60068-2-3
Hazardous LocationsATEX, Class I Division 2, IECEx
SafetyEN 60950-1, IEC 60950-1
VibrationIEC 60068-2-6


Time1,870,854 hrs
StandardsTelcordia (Bellcore), GB


Warranty Period5 years
Name Type Version Release Date
Datasheet for ICF-1280I Series Datasheet V1.2 21 May 2020


Operating Temp. 0 to 60°C
Fiber Module Type Multi-mode ST


Operating Temp. 0 to 60°C
Fiber Module Type Single-mode ST


Operating Temp. -40 to 75°C
Fiber Module Type Multi-mode ST


Operating Temp. -40 to 75°C
Fiber Module Type Single-mode ST

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