Siemens SITRANS 7MF03.0 Compact Operating Instructions page 30

Connecting
4.1 Basic safety instructions
Improper laying of shielded cables
Risk of explosion through compensating currents between hazardous area and the
non‑hazardous area.
● Shielded cables that cross into hazardous areas should be grounded only at one end.
● If grounding is required at both ends, use an equipotential bonding conductor.
Connecting device in energized state
Risk of explosion in hazardous areas.
● Connect devices in hazardous areas only in a de-energized state.
Exceptions:
● Devices having the type of protection "Intrinsic safety Ex i" may also be connected in
● Exceptions for type of protection "Increased safety ec" (Zone 2) are regulated in the
Incorrect selection of type of protection
Risk of explosion in areas subject to explosion hazard.
This device is approved for several types of protection.
1. Decide in favor of one type of protection.
2. Connect the device in accordance with the selected type of protection.
3. In order to avoid incorrect use at a later point, make the types of protection that are not
NOTICE
Ambient temperature too high
Damage to cable sheath.
● At an ambient temperature ≥ 60 °C (140 °F), use heat-resistant cables suitable for an
30
WARNING
WARNING
energized state in hazardous areas.
relevant certificate.
WARNING
used permanently unrecognizable on the nameplate.
ambient temperature at least 20 °C (36 °F) higher.
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA