Communication Connections; Wireless Communication - Emerson TopWorx 4310 Instruction Manual

4310 Wireless Position Monitor
December 2011
Figure 14. Magnet Assembly Orientation
ORIENTATION
AT ONE TRAVEL
EXTREME
ORIENTATION
AT MID‐TRAVEL
(FLATS PARALLEL
TO 4310 HOUSING
CHANNEL)
ORIENTATION
AT THE OTHER
TRAVEL EXTREME
W8836‐1A
W8836‐1B

Communication Connections

A HART communicating device, such as a 475 or 375 Field Communicator, interfaces with the 4310 wireless position
monitor. Convenient termination points are located inside the front cover, as shown in figure 2. The
polarity-insensitive connection pins provide access to the Maintenance Port defined in the WirelessHART
specifications. This port must be turned on from the local user interface by selecting SETUP, HANDHELD:ON before
digital communication can commence.
Wireless Communications
Devices in a WirelessHART network are time synchronized and send their data to the gateway at selectable update
rates. The update rates of the device have an effect on the number that the gateway can service. For example, if each
device sent an update once per minute the gateway could support 100 devices.
Battery powered devices conserve energy by only sensing and transmitting data at the selectable update rate. The
faster the update rate the the lower the life span of a power module. Figures 15, 16, 17, and 18 show the correlation
between power module life and update/sample rate, the number of sub-devices, and temperature, respectively.
Continuous updates is the default communication method as shipped, however, the 4310 can be configured to allow
position feedback sampling at faster than the default update rate. The is useful in certain applications; for example,
when used with relief valve monitoring. When using the standard and extended life battery sourced power modules,
sample rates can be set to as fast as 0.5 second sampling. When using the external power option, the sampling rate is
set to approximately 20 times per second.
Faster sampling affects power module life as shown in figures 15 and 16. Refer to Advanced Wireless Reporting
(Report By Exception and Delayed Trigger Reporting) on page 27 for additional information on faster sampling.
Consult the Emerson Smart Wireless Gateway information for details on network size, available at
http://www2.emersonprocess.com/en-US/brands/rosemount/Wireless/Wireless-Gateway/Pages/index.aspx
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Instruction Manual
D103391X012
MOUNTING BRACKET