Wiring To The Protonode 6 Pin Connector; Biasing The Modbus Rs-485 Device Network - FieldServer LonWorks ProtoNode Instruction Manual

Wiring to the ProtoNode 6 Pin Connector

3.2
•
Pins 1 through 3 are for Modbus RS-485 devices. The RS-485 GND (Pin 3) is not typically connected.
•
Pins 4 through 6 are for power.
Table 3-1: ProtoNode Pin Assignments
Device Pins
Pin RS-485 +
Pin RS-485 -
Pin GND
Power In (+)
Power In (-)
Frame Ground
Apply power to ProtoNode as shown below. Ensure that the power supply used
complies with the specifications provided in Section 7.
•
ProtoNode accepts either 9-30VDC or 12-24 VAC on pins 4 and 5.
Table 3-2: ProtoNode Power Requirements

3.2.1 Biasing the Modbus RS-485 Device Network

•
The ProtoNode has 510 Ohm resistors that can be used to set the biasing. The ProtoNode's
default positions from the factory for the Biasing jumpers are OFF.
•
The OFF position is when the 2 RED biasing jumpers straddle the 4 pins closest to the outside of
the board of the ProtoNode. See Figure 3-2.
•
Only turn biasing ON:
o IF the BMS cannot see more than one device connected to the ProtoNode
o AND you have checked all the settings (Modbus COM settings, wiring, and DIP
switches).
•
To turn biasing ON, move the 2 RED biasing jumpers to straddle the 4 pins closest to the inside of
the board of the ProtoNode.
Page 12 of 97
ProtoNode Pin #
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Power Requirements
Input Voltage 9-30VDC or 12-24VAC
Current Draw 210mA @ 12VDC/VAC
130mA @ 24VDC/VAC
Max Power 2.5 Watts
Pin assignment
RS-485 +
RS-485 -
RS-485 GND
24 VAC +
24 VAC -
FRAME GND
PN: 106417-05