Wiring Field Port To Rs-485 Bms Network; Wiring Field Port To A Lonworks Network - MSA FieldServer ProtoNode FPC-N34 Startup Manual

4.4

Wiring Field Port to RS-485 BMS Network

• Connect the RS-485 network wires to the 3-pin RS-485 connector on the ProtoNode FPC-N34 as shown below.
◦ Use standard grounding principles for RS-485 GND
• If the ProtoNode is the last device on the trunk, then the end of line (EOL) termination switch needs to be enabled. See
image below for the orientation of switch positions referenced below.
◦ The default setting from the factory is OFF (switch position = right side)
◦ To enable the EOL Termination, turn the EOL switch ON (switch position = left side)
• If more than one RS-485 device is connected to the network, then the field bias resistor switch needs to be enabled to
ensure proper communication. See image above for the orientation of switch positions referenced below.
◦ The default factory setting is OFF (switch position = right side)
◦ To enable biasing, turn the bias switch ON (switch position = left side)
NOTE: Biasing only needs to be enabled on one device. The ProtoNode has 510 ohm resistors that are used to
set the biasing.
4.5

Wiring Field Port to a LonWorks Network

• Connect ProtoNode to the field network with the LonWorks terminal using approved cable per the FT-10 installation
guidelines. LonWorks has no polarity.
17 ProtoNode Start-up Guide