Siemens SITRANS FS230 Compact Operating Instructions page 34

Connecting
4.1 Basic safety notes
Mains supply from building installation overvoltage category 2
A switch or circuit breaker (max. 15 A) must be installed in close proximity to the equipment
and within easy reach of the operator. It must be marked as the disconnecting device for the
equipment.
Note
Electromagnetic compatibility (EMC)
You can use this device in industrial environments, households and small businesses.
For metal enclosures there is an increased electromagnetic compatibility compared to high-
frequency radiation. This protection can be increased by grounding the enclosure.
See also
Technical specifications (Page 93)
Note
Improvement of interference immunity
• Lay signal cables separate from cables with voltages > 60 V.
• Use cables with twisted wires.
• Keep device and cables in distance to strong electromagnetic fields.
• Use shielded cables to guarantee the full specification according to HART.
• Connect a load resistor of at least 230 Ω in series in the signal circuit in order to guarantee
fault-free HART communication. When power supply isolators are used for SITRANS HART
transmitters, a load resistor is already installed in the device.
Uncovered non-intrinsically safe circuits
Risk of explosion in hazardous areas or electric shock when working on non-intrinsically safe
circuits.
If intrinsically safe and non-intrinsically safe circuits are operated in an enclosure with the type
of protection "Increased safety Ex e", the connections of the non-intrinsically safe circuits must
be additionally covered.
• Ensure that the cover of the non-intrinsically safe circuits complies with degree of
• Separate connections of the non-intrinsically safe circuits in accordance with IEC/
34
WARNING
WARNING
protection IP30 or higher according to IEC/EN 60529.
EN 60079-14.
Compact Operating Instructions, 05/2021, A5E38755607-AC
SITRANS FS230