Emerson Rosemount 5900S Reference Manual page 79

Reference Manual
00809-0100-5900
3.4.4 Hazardous areas
When the Rosemount Rosemount 5900S level gauge is installed in hazardous areas, local
regulations and specifications in applicable certificates must be observed.
3.4.5 Power requirements
The Rosemount 5900S is powered over the intrinsically safe Tankbus by the Rosemount
2410 Tank Hub. The 2410 feeds the intrinsically safe fieldbus segment by acting as a FISCO
power supply on the Tankbus.
When installed in a F
Rosemount 5900S is powered by the FF segment.
3.4.6 Power budget
The Rosemount 5900S power consumption is 50 mA for standard devices, and 100 mA for
the Rosemount 5900S 2-in-1 versions. This has to be considered when connecting field
devices to the Tankbus. See section "Power Budget" in the Rosemount 2410 Tank Hub
Reference Manual
3.4.7 Tankbus
The Rosemount Tank Gauging system is easy to install and wire. Devices can be "daisy-
chained" thus reducing the number of external junction boxes.
In a Rosemount Tank Gauging system devices communicate with a Rosemount 2410 Tank
Hub via the intrinsically safe Tankbus. The Tankbus complies with the FISCO
Fieldbus standard. The Rosemount 2410 acts as power supply to the field devices on the
Tankbus. A FISCO system enables more field devices to be connected to the segment
compared to conventional IS systems based on the entity concept.
Termination
A terminator is needed at each end of a F
terminator is placed in the fieldbus power supply, and the other one in the last device in
the fieldbus network.
Note
Ensure that there are two terminators on the fieldbus.
In a Rosemount Tank Gauging system the Rosemount 2410 Tank Hub acts as power
supply. Since the tank hub normally is the first device in the fieldbus segment, the built-in
termination is enabled at factory.
Other devices such as the standard version of the Rosemount 5900S Radar Level Gauge,
the Rosemount 2230 Graphical Field Display, and the Rosemount 2240S Multi-input
Temperature Transmitter also have built-in terminators which can easily be enabled by
inserting a jumper in the terminal block when necessary.
(5) FISCO=Fieldbus Intrinsically Safe Concept
Rosemount 5900S Radar Level Gauge
Fieldbus system without a Rosemount 2410 Tank Hub, the
OUNDATION
for more information.
OUNDATION
September 2019
(5)
™
Fieldbus network. Generally, one
Installation
F
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