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OPTIBAR LC 1010
4.1 General notes
Circuits
The circuits are designed in protection type "intrinsically safe".
The connecting cables should be selected according to the applicable installation standards (e.g.
EN 60079-14) and the maximum operating temperature. Ensure that no residual current can
form between separate intrinsically safe signal circuits.
• The connecting cables must be fixed and laid so they are sufficiently protected against
damage.
• Devices with plugs are to be mounted in that way that ingress protection IP20 is maintained.
• Lay cables so as to ensure that there is sufficient distance between surfaces of the
measuring unit and the connecting cable.
• Unused cable entries are to be closed (>IP66 / 67).
Ensure that all seals are tight.
4.2 Power supply
The pressure transmitter does not require a separate power supply. The required supply for the
built-in electronics is provided via the 4...20 mA current output.
Overvoltage protection
If the level probe is being used as category 1 G equipment, a suitable overvoltage protection
device must be installed upstream (see Industrial Safety Regulations [BetrSichV] and EN 60079-
14).
4.3 Inputs/outputs
The terminal assignment of the built-in electrical equipment is described in the standard
documentation. The pressure transmitter signal circuits may only be connected to certified
intrinsically safe slave units or circuits. For more information refer to chapter "Electrical data".
4.4 Grounding and equipotential bonding
If the device is not sufficiently electrostatically grounded via the process cables, an additional
ground connection must be established using the ground terminal.
Any existing cable shields should be connected to ground according to applicable installation
regulations (EN 60079-14). A terminal connection in the terminal compartment permits a short
way grounding of the cable shields.
4.5 Impact and friction sparks
When used as category 1G equipment, the OPTIBAR LC 1010 in titanium versions must be
mounted in such a way that sparks from impact and friction between titanium and steel (except
stainless steel, if the presence of rust particles can be excluded) cannot occur.
11/2020 - 4007640202 - AD OPTIBAR LC 1010 Ex ia R02 en
ELECTRICAL CONNECTIONS
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