Device Connectivity 14-33 xa .c o m Device Connectivity Serial Media Converters > ICF-1180I/1280I Series 14 Specifications Fiber Link Monitor The ICF-1180I/1280I series converter provides a fiber link monitoring function to detect the 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 in a remote fiber segment, the Fault LED will flash to indicate the abnormality is happening in the remote segment. Engineers can use the fiber test function for troubleshooting. Auto/Manual Baudrate Settings The ICF-1180I/1280I series converters simply convert the signal 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-1180I/1280I series 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. 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-1180I/1280I series converter 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-1180I/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. 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 allows you to do the following: 1. Record the incoming optical power for later measurement (e.g., to indicate aging or damage). 2. Carry out a good/bad test (limit value). Technology Standards: IEC 61158-2 for PROFIBUS DP Interface P1/P2/P3 Ports: ICF-1180I: P1 port: ST optical fiber P2 port: PROFIBUS DP (DB9 female) ICF-1280I: P1/P2 ports: ST optical fiber P3 port: PROFIBUS DP (DB9 female) Relay Alarm: One relay output with current-carrying capacity of 2 A @ 30 VDC (Normal open) LED Indicators: PWR1, PWR2, Ready, P1, P2, P3, Fault DIP Switches: DIPs 1 to 4: Baudrate setting DIP 5: Fiber link monitor ICF-1180I: DIP 6: Fiber Inverse function DIP 7: Reserved DIP 8: Remote Fiber Diagnosis ICF-1280I: DIPs 6 to 7: Linear/Star mode (w/ optional P1/P2 disabled), Redundant Ring mode DIP 8: Remote Fiber Diagnosis PROFIBUS Communication Data Rate: 9.6, 19.2, 45.45, 93.75, 187.5, 500, 1500, 3000, 6000, and 12000 Kbps Auto Baudrate: Yes Isolation Protection: 2 kV