Installation and Connections
XW-210 WiFi™ Users Manual
Multiple sensors can be connected in two ways: directly connected (star topology) or “daisy chained”
(linear topology). Many factors can determine the maximum length of the cable, including the sensor
network topology, the type of cable used, the number of sensors and ambient electromagnetic noise.
Combined cable lengths to all sensors of 600 ft using Cat 5e cable have been successful. However, due
to the uniqueness of installation environments, results may vary. Please test in the desired environment
before making a permanent installation.
The following are general recommendations that will maximize sensor runs and minimize problems.
Cat 5 and Cat 5e network cable has proven to be an effective and low-cost solution for long runs. Other
cable types can be used, but cable capacitance generally limits the length. The illustration shows the
recommended connection using Cat 5 network cable. Connect all unused conductors to ground.
A linear (daisy chain) topology will minimize signal reflections, providing a more reliable connection and
will allow longer cable length than a star topology.
The 1-wire bus is "single-ended" and has no intrinsic noise protection. It is susceptible to interference if
the cable is routed near power lines, fluorescent fixtures, motors or other noise sources. Keep the cable
wiring short and avoid routing it near other electrical equipment.
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Xytronix Research & Design, Inc.
Recommended connections using Cat 5 cable
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