AERCO ProtoNode FPC-N34 & FPC-N35 User Manual
CHAPTER 3 – Interfacing ProtoNode to Devices
OMM-0107_0B
AERCO International, Inc.
•
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3.3 BACnet MS/TP, Modbus RTU or Metasys N2 (FPC-N34): Wiring Field Port to
RS-485 BAS Network
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Connect the BACnet MS/TP or Metasys N2 RS-485 network wires to the 3-pin RS-485
connector on ProtoNode FPC-N34 as shown below in Figure 3-5.
o
The RS-485 GND (Pin 3) is not typically connected.
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See Chapter 5 for information on connecting to BACnet/IP network.
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If the ProtoNode is the last device on the BACnet MS/TP or Metasys N2 trunk,
then the End-Of-Line Termination jumper needs to be enabled (Figure 3-6).
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).
Figure 3-5: Connection from ProtoNode to RS-485 Field Network
Figure 3-6: RS-485 BMS Network EOL Switch
3.4 LonWorks (FPC-N35): Wiring Field Port to LonWorks Network
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Connect ProtoNode to the field network with the LonWorks terminal using a twisted
pair non-shielded cable. LonWorks has no polarity.
Figure 3-7: LonWorks Terminal
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
End-of-Line
Switch
G
-
+
