Emerson Rosemount 5900S Reference Manual page 80

Installation
September 2019
Segment design
When designing a FISCO fieldbus segment a few requirements need to be considered.
Cabling has to comply with FISCO requirements as described in
Tankbus.
You will also have to ensure that the total operating current of the connected field devices
is within the output capability of the Rosemount 2410 Tank Hub. The 2410 is able to
deliver 250
the total current consumption is less than 250 mA, see
Another requirement is to ensure that all field devices have at least 9 V input voltage at
their terminals. Therefore you will have to take into account the voltage drop in the
fieldbus cables.
Distances are normally quite short between the Rosemount 2410 Tank Hub and field
devices on the tank. In many cases you can use existing cables as long as the FISCO
requirements are fulfilled (see
See chapter "The Tankbus" in the Rosemount 2410 Tank Hub
information on segment design of a Rosemount Tank Gauging system.
3.4.8 Typical installation
The example below
single tank. Terminators are installed at both ends of the fieldbus segment as required in a
F
OUNDATION
Tank Hub and a field device at the end of the network segment.
In addition to the field instruments on the Tankbus,
instrument such as a pressure transmitter can be connected to the intrinsically safe 4 -20
mA analog input of the 2410 Tank Hub.
Maximum number of HART Slave Devices:
Passive current loop: 5
Active current loop: 3
(6) In Smart Wireless Systems the 2410 can deliver 200 mA on the Tankbus
80
(6)
mA. Consequently, the number of field devices has to be considered so that
Cable selection for the
(Figure 3-20) illustrates a system with daisy-chained field devices on a
Fieldbus system. In this case terminators are enabled in the Rosemount 2410
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Cable selection for the
Power budget.
Tankbus).
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Figure 3-20 illustrates how an
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