Electrical connection
Liquicap M FMI52 HART
18
Hauser
5
Electrical connection
Before connecting the power supply, note the following:
• the supply voltage must match the data specified on the nameplate
• switch off the supply voltage before connecting the device
• connect the potential equalization to the ground terminal on the sensor
When using the probe in hazardous areas, the relevant national standards and the
information in the safety instructions (XA) must be observed.
Use the specified cable gland only.
5.1
Connecting requirements
5.1.1
Potential equalization
L
DANGER
Risk of explosion!
‣
Connect the cable screen on the sensor side only if installing the probe in Ex-areas!
Connect the potential equalization to the outer ground terminal of the housing (T13, F13,
F16, F17, F27). In the case of the stainless steel housing F15, the ground terminal can also be
located in the housing. For further safety instructions, please refer to the separate
documentation for applications in hazardous areas.
5.1.2
Electromagnetic compatibility (EMC)
Interference emission to EN 61326, Electrical Equipment Class B. Interference immunity to
EN 61326, Annex A (Industrial) and NAMUR Recommendation NE 21 (EMC).
Failure current is in accordance with NAMUR NE43: FEI50H = 22 mA.
A standard commercial instrument cable can be used.
Information on connecting shielded cables is provided in Technical Information
TI00241F "EMC test procedures".
5.1.3
Cable specification
Connect the electronic inserts by using commercially available instrument cables. If a potential
equalization is present, and the shielded instrument cables are used, connect the shielding on
both sides to optimize the shielding effect.
