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WARNING
Cable requirements
Cables must be suitable for the temperature (at least 70 °C) and be flammability-rated to at
least V-2.
Note
End Of Line (EOL) termination
The FCT010 EOL termination DIP switch is default set to EOL active. To change termination
setting see Warnings (Page 27).
It is important to terminate the Modbus RS-485 line correctly at the start and end of the bus
segment. Impedance mismatch results in reflections on the line which can cause faulty
communication transmission.
If the device is at the end of the bus segment, it is recommended to terminate the device. The
following table shows the relation between the DIP switch settings and the permissible
communication interface set-ups.
Note
End Of Line (EOL) termination
The FCT010 EOL termination DIP switch is default set to EOL non-active. If the installation
requires active termination resistors, the DIP switches should be set to the EOL Active state.
CAUTION
Hazardous areas
Only change the DIP switches in hazardous areas when the device is deenergized.
Location of DIP switch
The DIP switch is located in the electronic as shown below.
FW4
FW3 (before 07/2018)
2))
21
21
2))
Connecting
4.2 Connecting the FC410
SITRANS FC410
28
Compact Operating Instructions, 05/2020, A5E39942309-AB