AERCO ProtoNode FPC-N34 & FPC-N35 User Manual
CHAPTER 3 – Interfacing ProtoNode to Devices
Page
20
of
108
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0107_0B
03/07/2017
Ph.: 800-526-0288
GF-150
3.2.2
End of Line Termination Switch for the Modbus RS-485 Device Network
•
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 jumper 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 may
not
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 on the right in the A position (default
factory setting).
ProtoNode FPC-N34 ProtoNode FPC-N35
Figure 3-4: Modbus RS-485 End-Of-Line Termination Switch
Modbus
RS-485
EOL Switch
Leave in A Position
