Moxa ICF-1280I-S-ST-T [2/4] Auto manual baudrate settings
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Moxa ICF-1280I-S-ST-T [2/4] Auto manual baudrate settings

Moxa ICF-1280I-S-ST [2/4] Auto manual baudrate settings
Serial Media Converters
2
www.moxa.com
Specifications
Fiber Link Monitor
The ICF-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 is occurred in a remote fiber segment, the Fault
LED will flash to indicate the abnormality is happened in remote
segment. Engineers can use the fiber test function for troubleshooting.
Auto/Manual Baudrate Settings
The ICF-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-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-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-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 Port: 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:
DIP 1 to 4: Baudrate setting
DIP 5: Fiber link monitor
DIP 6 to 7: Linear/Star mode (w/ optional P1/P2 disable), 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
Optical Fiber Side
Point-to-Point, Linear (Bus), Star, Redundant Topologies:
Multi-mode Single-mode
Wavelength
820 nm 1310 nm
Tx Output
-14 dBm -7 dBm
Rx Sensitivity
-28 dBm -29 dBm
Link Budget
14 dBm 21 dBm
Typical Distance
4 km 45 km

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