Triangle Tube’s ProtoNode Startup Guide
Page 16 of 40
ProtoCessor
1991 Tarob Court Milpitas, California 95035 USA
Web
Figure 10: Modbus RS-485 End-Of-Line Termination Jumper on the ProtoNode N34 (left) and
ProtoNode N35 (right)
Leave in A Position
Modbus RS-485 EOL Jumper
•
On long RS-485 cabling runs, the RS-485 trunk must be properly terminated at each end.
•
The ProtoNode has an End Of Line (EOL) blue jumper. The default setting for this Blue EOL switch is
OFF with the jumper straddling the pins closest to the inside of the board of the ProtoNode.
o
On short cabling runs the EOL jumper does not to need to be turned ON.
•
If the ProtoNode is placed at one of the ends of the trunk, set the blue EOL jumper to the ON position
straddling the pins closest to the outside of the board of the ProtoNode.
•
Always leave the single Red Jumper in the A position (default factory setting).
3.2.2 End of Line Termination Jumper for the Modbus RS-485 port on the ProtoNode
