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
OUNDATION
Fieldbus system without a Rosemount 2410 Tank Hub, the
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
for more information.
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
F
OUNDATION
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
OUNDATION
™
Fieldbus network. Generally, one
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
Reference Manual
Installation
00809-0100-5900
September 2019
Rosemount 5900S Radar Level Gauge
79
Summary of Contents for Rosemount 5900S Series
Page 1: ...Reference Manual 00809 0100 5900 Rev EA September 2019 Rosemount 5900S Radar Level Gauge ...
Page 6: ...Contents Reference Manual September 2019 00809 0100 5900 vi Reference Manual ...
Page 12: ...Introduction Reference Manual September 2019 00809 0100 5900 12 Reference Manual ...
Page 182: ...Configuration Reference Manual September 2019 00809 0100 5900 182 Reference Manual ...
Page 186: ...Operation Reference Manual September 2019 00809 0100 5900 186 Reference Manual ...
Page 266: ...Product Certifications Reference Manual September 2019 00809 0100 5900 266 Reference Manual ...