Use of the terminal resistor depends on the location of the control computer in the FNet or I/O network. Looped
control computers do not require a terminal resistor.
Control computers or end stations at the beginning or end of the network require a terminal resistor. Depending
on the device type a 120 Ohm resistance, a jumper or a dipswitch is used to terminate the control computer.
Example: Setting the terminal resistor FNet
Four control computers connected using FNet.
Control computers 1 and 4 are at the end of the network. These control computers must be terminated.
Control computers 2 and 3 are looped. These looped control computers do not require a terminal
resistor.
Example: Setting the I/O-net terminal resistor (1)
One control computer connected to two I/0 network modules using one I/O-net.
The control computer is located between the two I/O network modules. This does not require a terminal
resistor.
Both I/O network modules are at the end of the network. These must be terminated.
Example: Setting the I/O-net terminal resistor (2)
One control computer connected to one network module using one I/O-net. This I/O network module is
linked to a second I/O network module.
The control computer and the second I/O network module require a terminal resistor.
The first I/O network module is looped. This does not require a terminal resistor.
The Fancom Greenlink cable (UTP 1x2x0.8mm, unshielded twisted pair) used to wire the FNET and I/O
net. Maximum cable length = 1200 meters.
Connect each Fancom device according to the applicable legislation/regulations of the local energy
provider.
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General