Connecting Or Disconnecting In Explosive Environments - Siemens SITRANS F Series Operating Instructions Manual

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/
Insufficient isolation of intrinsically safe and non-intrinsically safe circuits
Risk of explosion in hazardous areas.
• When connecting intrinsically safe and non‑intrinsically safe circuits ensure that isolation is
• Ensure that you observe the device approvals applicable in your country.
6.1.1

Connecting or disconnecting in explosive environments

Connecting or disconnecting in explosive environments
Connecting or disconnecting a powered device in explosive environments can lead to an
explosion.
• Connect and disconnect in non-explosive environments.
• Remove power to the device before connecting or disconnecting in explosive atmosphere.
SITRANS FST090
Operating Instructions, 11/2021, A5E50387341-AA
WARNING
protection IP30 or higher according to IEC/EN 60529.
EN 60079-14.
WARNING
carried out properly in accordance with local regulations for example IEC 60079-14.
WARNING
- or-
Connecting
6.1 Basic safety notes
27