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Tried-and-Tested Fields of Application of the BULLET
The adapter is ideal for systems in which dirt and moisture prevail,
such as those used in the manufacture of paper. After all, wherever
bleach is used, dangerous concentrations of gases may occur. But
even in tank applications where many different measurements take place,
the BULLET is the right choice: With the multidrop feature, up to
eight field devices can be bundled together for connection to a single
adapter. This makes it possible to achieve huge savings when
expanding networks.
The loop-powered adapter can be used in the chemicals industry and
pharmaceutical industry too, in mobile mixing tanks, for example.
These mobile mixing tanks fulfill a wide range of functions in the
process-engineering processes that apply for this sector thanks to
their integrated agitator. The mixing tanks may serve as preparation
containers, material buffers, or as stores for dosed products. Since
they are frequently used in safeguarded procedures that are subject
to special monitoring processes, the mixing tanks are equipped
with sensors. These 4 mA … 20 mA HART-compatible sensors control
the drive speed of the agitator and detect the temperature, pressure,
pH value, and fill level of the tank. Using the BULLET, the data from
these field devices can be transmitted to the process control system
wirelessly via the gateway. “This ensures the mixing tank can remain
mobile while at the same time making sure the existing power supply is
used to optimum effect,” explains Garry Cusick, Business Development
Manager USA at Pepperl+Fuchs. This is because both the BULLET
adapters and the field devices can be powered directly from the existing
energy source. While a BULLET adapter transmits the 4 mA … 20 mA
signal from the agitator, the HART signals indicating the temperature,
pressure, pH value, and fill level are transmitted to a second BULLET
device via the multidrop procedure. In this way, the BULLET adapter
makes it possible to achieve a high level of performance, cost-efficiency,
and flexibility when planning systems.
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