Siemens SITRANS LH100 Compact Operating Instructions page 18

Connecting
5.1 Basic safety instructions
Unprotected cable ends
Risk of explosion through unprotected cable ends in hazardous areas.
● Protect unused cable ends in accordance with IEC/EN 60079-14.
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
Note
Electromagnetic compatibility (EMC)
You can use this device in industrial environments, households and small businesses.
For metal housings there is an increased electromagnetic compatibility compared to high-
frequency radiation. This protection can be increased by grounding the housing,
see Connecting (Page 17).
Note
Improvement of interference immunity
● Lay signal cables separately to cables with voltages > 60 V.
● Use cable with twisted wires.
● Keep the device and the cables at a distance from strong electromagnetic fields.
18
WARNING
WARNING
WARNING
energized state in hazardous areas.
relevant certificate.
SITRANS LH100 Transmitter for Hydrostatic Level
Compact Operating Instructions, 01/2019, A5E32588610-AA