3.4.4
Hazardous areas
When the Rosemount Rosemount 5900C level gauge is installed in hazardous areas, local
regulations and specifications in applicable certificates must be observed.
3.4.5
Power requirements
The Rosemount 5900C 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 5900C is powered by the FF segment.
3.4.6
Power budget
The Rosemount 5900C power consumption is 50 mA. 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 5900C 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
Installation
Reference Manual
September 2019
00809-0100-5901
106
Reference Manual
Summary of Contents for Rosemount 5900C
Page 1: ...Reference Manual 00809 0100 5901 Rev DA September 2019 Rosemount 5900C Radar Level Gauge ...
Page 6: ...Contents Reference Manual September 2019 00809 0100 5901 vi Reference Manual ...
Page 12: ...Introduction Reference Manual September 2019 00809 0100 5901 12 Reference Manual ...
Page 116: ...Installation Reference Manual September 2019 00809 0100 5901 116 Reference Manual ...
Page 204: ...Configuration Reference Manual September 2019 00809 0100 5901 204 Reference Manual ...
Page 208: ...Operation Reference Manual September 2019 00809 0100 5901 208 Reference Manual ...
Page 290: ...Product Certifications Reference Manual September 2019 00809 0100 5901 290 Reference Manual ...