Lochinvar ProtoNode Start-up Guide
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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.
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
for information on connecting to the Ethernet network.
Device Pins
ProtoNode
Pin Label
Pin
Assignment
RS-485 +
TX +
RS-485 +
RS-485 -
RX -
RS-485 -
RS-485 GND
GND
RS-485 GND
BMS
Wiring
ProtoNode
Pin Label
Pin
Assignment
RS-485 +
+
RS-485 +
RS-485 -
-
RS-485 -
-
GND
RS-485 GND
Figure 6: RS-485 Connections from Devices to the ProtoNode
Figure 7: Connection from ProtoNode to RS-485 Field Network
G
-
+
G
-
+
