Antenna Adjustment Considerations; Estimating Range Of An Antenna; Figure 23. Magnetic Mount Bracket With Antenna - Mounted On Steel Surface; Figure 24. Highest Rf Signal When Antennas Are As Parallel To Each Other As Possible - Honeywell Limitless WPMM Series Installation And Technical Manual
Monitor used in conjunction with the limitless switch series
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Limitless™ WPMM Series
Magnetic mount: The benefit of the magnetic-mount antenna is its
ability to mount on any ferrous-metal surface and in various
orientations. A smooth metal surface is preferred to allow the best
attraction of the magnet to the surface. First, the user will need to
determine if the magnetic attraction is sufficient to hold the antenna in
the desired position (i.e., shock, vibration, etc. in the application).
Placing the antenna in a location where it cannot be inadvertently
displaced may help. Magnetic-mount antennas are not designed for
mobile applications.
7.2.4 Antenna Adjustment Considerations
The antenna of the Limitless™ switch and WPMM monitor should be
oriented in parallel. This will, in most cases, allow the longest range
and highest RF signal. The least RF signal is normally in a direction in-
line with the top of the antenna, so avoid having antennas pointed
directly toward or directly away from each other.
Figure 24. Highest RF signal when antennas are as parallel to each other as possible
7.3
Estimating Range of an Antenna
The signal range is defined as the physical distance between the Limitless™ switch and WPMM monitor. It's a
function of the antenna's gain, radio output of the Limitless™ switch and WPMM monitor (8 dBm or 18 dBm), and
cable loss (if used) in conjunction with the environment (i.e. outdoor urban, indoors, etc.) that the Limitless™
product is operating in. The Honeywell antenna range calculator can be used to estimate the expected signal range
that can be achieved between the Limitless™ switch and WPMM monitor with chosen antennas, cable extensions,
radio output, etc. The calculator can be found at www.honeywell.com/limitless.
Signal range specification:
250 m [820 ft] (nominal) – 8 dBm radio output
305 m [1000 ft] (nominal) – 18 dBm radio output
Line of sight with a 2.2 dBi antenna installed on the Limitless™ switch and WPMM monitor
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Honeywell Sensing and Control
50051864
Issue 2
Figure 23. Magnetic Mount Bracket
with Antenna – Mounted on Steel
Surface
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