ProtoNode Start-Up Guide
Page 15 of 37
4.4 Wiring Field Port to RS-485 BMS Network
Connect the RS-485 network wires to the 3-pin RS-485 connector on ProtoNode FPC-N34 as
shown below in
Figure 11
.
o
The RS-485 GND (Pin 3) is not typically connected
If the ProtoNode is the last device on the RS-485 trunk, then the End-Of-Line Termination
Switch needs to be enabled (
Figure 12
).
o
The default setting from the factory is OFF (switch position = right side)
o
To enable the EOL Termination, turn the EOL switch ON (switch position = left
side)
4.5 Wiring Field Port to a LonW orks Network
Connect ProtoNode to the field network with the LonWorks terminal using approved cable per the
FT-10 installation guidelines. LonWorks has no polarity.
BMS RS-
485 Wiring
ProtoNode
Pin #
Pin
Assignment
RS-485 +
Pin 1
RS-485 +
RS-485 -
Pin 2
RS-485 -
-
Pin 3
RS-485 GND
Figure 12: RS-485 BMS Network EOL Switch
Figure 11: Connection from ProtoNode to RS-485 Field Network
Figure 13: LonWorks Terminal
G
-
+
End-of-Line Switch
