Interfacing Protonode To Devices; Device Connections To Protonode; Lochinvar Low Voltage Modbus Rtu Wiring To The Protonode (Armor, Sync/Armor X2, Knight/Knight Xl, Crest, Copper-Fin Ii And Ftxl); Wiring Field Port To Rs-485 Serial Network - SMC Networks Lochinvar ProtoNode Startup Manual

4

INTERFACING PROTONODE TO DEVICES

4.1

Device Connections to ProtoNode

The ProtoNode has a 3-pin Phoenix connector for connecting RS-485 devices on the R1 port.
NOTE: Use standard grounding principles for RS-485 GND.
Device Pins
RS-485 +
RS-485 -
RS-485 GND
4.1.1 Lochinvar Low Voltage Modbus RTU Wiring to the ProtoNode (Armor,
SYNC/Armor X2, Knight/Knight XL, Crest, Copper -Fin II and FTXL)
•
On the Lochinvar's Modbus terminal strip, connect Pin A (RS-485+) to B+ (RS-485+) on the
ProtoNode's R1 port 3-pin Phoenix connector.
•
On the Lochinvar's Modbus terminal strip, connect Pin B (RS-485-) to A- (RS-485-) on the
ProtoNode's R1 3-pin Phoenix connector.
•
The Shield Pin on the terminal strip (which is Ground) does not need to be grounded to the
ProtoNode.
4.2

Wiring Field Port to RS-485 Serial Network

•
Connect the RS-485 network wires to the 3-pin RS-485 connector on the R2 port.
o
Use standard grounding principles for RS-485 GND
•
See Section 5 for information on connecting to the Ethernet network.
BMS
Wiring
RS-485 +
RS-485 -
-
ProtoNode Pin
Pin Label Assignment
TX + RS-485 +
RX - RS-485 -
GND RS-485 GND

Figure 6: RS-485 Connections from Devices to the ProtoNode

ProtoNode Pin
Pin Label Assignment
+ RS-485 +
- RS-485 -
GND RS-485 GND

Figure 7: Connection from ProtoNode to RS-485 Field Network

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Lochinvar ProtoNode Start-up Guide
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