Endress+Hauser Prosonic S FMU90 PROFIBUS DP - Sensor Connection

Electrical connection Prosonic S FMU90 PROFIBUS DP
30 Endress+Hauser
Spurs
Information regarding spurs
• The cable between the connector and the bus driver in the field device is known as a
spur.
• Total length of all spurs < 6.6 m (22 ft) at max. 1.5 Mbit/s.
• Spurs may not have a bus terminator.
• Spurs should not be used for transmission rates > 1.5 Mbit/s.
• Practical experience in plants has shown that caution must be exercised when
configuring spurs. It cannot be assumed that the sum of all spurs at transmission rates of
1.5 Mbit/s may be 6.6 m (22 ft). This is greatly influenced by the actual arrangement of
the field devices.
6.3.3 Sensor connection
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CAUTION
Inadequate potential equalization can compromise electrical safety
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Connect the yellow/green protective ground of the FDU91F, FDU93 and FDU95
sensors to local potential equalization after a maximum distance of 30 m (98 ft). The
can be done in a terminal box, at the transmitter or in the cabinet.
NOTICE
Interference signals may cause malfunctions
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Do not route the sensor cables parallel to high-voltage electric power lines or near
frequency converters.
NOTICE
A damaged cable shield may cause malfunctions
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For pre-terminated cables: connect the black wire (shield) to the "BK" terminal.
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For extension cables: twist the shield and connect to the "BK" terminal.
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WARNING
Explosion Hazard
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Do not connect FDU83, FDU84, FDU85 and FDU86 sensors with an ATEX, FM, or CSA
certificate to the FMU90 or FMU95 transmitters.
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For the sensors FDU91F/93/95/96 and FDU83/84/85/86: connect the ground cable
(GNYE) to local potential equalization after a maximum distance of 30 m (98 ft). This
can be done in the terminal box or at the transmitter or in the cabinet if the distance to
the sensor does not exceed 30 m (98 ft).
NOTICE
The evaluation electronics and their direct connections (display/service connector,
service interface etc.) are galvanically isolated from the power supply and the
communication signals, and are connected to the potential of the sensor electronics.
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Pay attention to the potential difference in the case of grounded sensors.
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If removing the jacket of the sensor cable, take the longest required cable length into
consideration.
Further information and the documentation currently available can be found on
the Endress+Hauser website: www.endress.com → Downloads.
Sensor documentation:
• TI01469F (FDU90)
• TI01470F (FDU91)
• TI01471F (FDU91F)
• TI01472F (FDU92)
• TI01473F (FDU93)
• TI01474F (FDU95)
Sensors FDU80/80F/81/81F/82/83/84/85/86/96 can no longer be ordered. The
Prosonic S transmitter can still be connected if the sensors are already installed.