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PRESSURE CONTROL VALVE
BACNET NETWORKING
Network Wire Specifications
For the BACnet MS/TP network specific wire is required.
Do not use standard power or "thermostat" wire. This
wire does not have the necessary requirements for digital
communications. While it's possible it may work (temporarily)
the network will be unreliable and not operating at optimal.
BACnet MS/TP Wire type recommendations
•
Use 1 balanced twisted pair
•
Low capacitance (17pF or less)
•
Plenum rated (FT6, CMP ratings)
•
100-120 ohm, Balanced
•
(CAT5, CAT5E, CAT6 network cable has excellent
specifications and will work in almost any BACnet MS/TP
application.)
•
Price recommends using the Orange Compliment
for (+), the Orange for (-), and the Brown and Brown
Compliment for the (NET COM) connections. These
are paired in a standard CAT5E cable.
NOTE:
NETCOM MUST BE WIRED
Termination
BACnet MS/TP networks must be terminated to ensure proper
operation. A network should be terminated twice, once at
the beginning and once at the end. Termination helps reduce
reflections and noise. The terminating can be done with a 100
ohm resistor across the + and - lines.
Tech Tip: The Price BACnet MS/TP to IP Router has built
in termination and it is enabled by default (since the router is
typically the beginning of the entire MS/TP network). Now you
only have to go and find/terminate that last device.
WIRING
PIN 1
PIN 2
PIN 3
PIN 4
PIN 5
PIN 6
PIN 7
PIN 8
Electrical Noise
Electrical noise can affect both analog signal and digital
communications such as BACnet. Therefore do not route
high voltage lines next to the BACnet network! Avoid noisy
electrical sources such as:
•
Variable Frequency Drives
•
High current power lines
(main panel feeds)
•
Fluorescent light fixtures
If you must pass near noisy electrical lines cross at right
angles. This will help reduce the amount of noise coupled to
the network wires.
ELECTRICAL NOISE EXAMPLE
HIGH VOLTAGE/
CURRENT LINE
BACNET NETWORK
priceindustries.com | PRESSURE CONTROL VALVE - Manual
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