Siemens SITRANS P Series 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.
Connecting device in an energized state / Disconnecting device from power supply in an
energized state
Risk of explosion in hazardous areas.
● In hazardous areas, only connect the device in a de-energized state and only disconnect
Exceptions:
● Devices with the "Intrinsic safety Ex i" type of protection may also be connected or
● Exceptions for "Non-sparking nA" type of protection (Zone 2) are regulated in the relevant
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 Electrical
connections (Page 19).
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.
Note
Power supply
The device should only be supplied with limited energy according to UL61010-1 Second
Edition, Section 9.3 or LPS (Low Power Supply) in accordance with UL60950-1 or Class 2 in
accordance with UL1310 or UL1585.
18
WARNING
WARNING
the device from the power supply in a de-energized state.
disconnected in an energized state in hazardous areas.
certificate.
Compact Operating Instructions, 02/2019, A5E03304437-AB
SITRANS P220