Siemens SITRANS FUH1010, Product Instruction Manual, Page: 15 / 264

Safety notes
2.4 Installation in hazardous area
FUH1010 IP65 NEMA 4X Precision Volume
14
Operating Instructions, 01/2013, A5E32122003-AA
WARNING
Explosion Hazard
Devices without the correct hazardous area approval create dangerous environments.
Make sure the hazardous area approval is suitable for the environment in which the
device will be installed.
Intrinsically safe data
WARNING
Explosion Hazard
User must install unit with Siemens drawings. With intrinsically safe circuits, use only
certified meters appropriate for the transmitter.
If a non-conforming supply unit is used, the "fail-safe" type of protection will no longer be
effective and the approval certification will be invalid.
Hazardous area safety requirements
It is required that:
●
Electrical connections are in accordance with EN60079-14 (Installing Electrical Systems
in Explosion Hazardous Areas).
● The protective cover over the power supply is properly installed. For intrinsically safe
circuits the connection area can be opened.
● Appropriate cable connectors are used for the output circuits:
–
Intrinsically safe: blue
– Non-intrinsically safe: black
● Sensor and transmitter are connected to the potential equalization.
For intrinsically safe output circuits potential equalization must be maintained along the
entire connection path.
● When protective earth (PE) is connected, no potential difference between the protective
earth (PE) and the potential equalization (PA) can exist, even during a fault condition.