Device Connections To Protonode; Connecting Nuro Modbus Rtu Boilers To The Protonode's Rs-485; Connecting Love Modbus Rtu Boilers To The Protonode's Rs-485; Connecting Envi Modbus Rtu Boilers To The Protonode's Rs-485 - SMC Networks ProtoNode FPC-N34 Manual

3.2 Device Connections to ProtoNode

ProtoNode 6 Pin Phoenix connector for RS-485 Devices
•
The 6 pin Phoenix connector is the same for ProtoNode FPC-N34 (BACnet) and FPC-N35
(LonWorks).
•
Pins 1 through 3 are for Modbus RS-485 devices.
o
The RS-485 GND (Pin 3) is not typically connected
•
Pins 4 through 6 are for power. Do not connect power wait until Section
3.2.1 Connecting NURO Modbus RTU Boilers to the ProtoNode's RS -485
•
Connect NURO's Modbus COM A to ProtoNode's pin 1 labeled Tx/+ on the Phoenix 6 pin
connector.
•
Connect NURO's Modbus COM B to ProtoNode's pin 2 labeled Rx/- on the Phoenix 6 pin
connector.
•
Do not connect Ground between NURO and the ProtoNode's RS-485 Ground.
3.2.2 Connecting LOVE Modbus RTU Boilers to the ProtoNode's RS -485
•
Connect LOVE's Modbus DATA+ to ProtoNode's pin 1 labeled Tx/+ on the Phoenix 6 pin
connector.
•
Connect LOVE's Modbus DATA- to ProtoNode's pin 2 labeled Rx/- on the Phoenix 6 pin connector.
•
Do not connect Ground between LOVE and the ProtoNode's RS-485 Ground.
3.2.3 Connecting ENVI Modbus RTU Boilers to the ProtoNode's RS -485
•
Connect ENVI's Modbus COM 1A (RS-485+) to ProtoNode's pin 1 labeled B+ (RS-485+) on the
Phoenix 6 pin connector.
•
Connect ENVI's Modbus COM 1B (RS-485-) to ProtoNode's pin 2 labeled A- (RS-485-) on the
Phoenix 6 pin connector.
•
Do not connect Ground between ENVI and the ProtoNode's RS-485 Ground.

Figure 11: Wiring diagram for Modbus RTU RS-485 connections to the ProtoNode's RS-485 port

Page 16 of 50
ProtoNode Startup Guide
3.5.