1. For relationship between type of the connected circuit, maximum permissible ambient temperature and temperature class (for group II application) as well as the effective internal reactances for the individual types of the Valve Position Sensors, refer to the attachment to IECEx TÜV 17.0021 X and in the operating instructions manual.
2. For Group III, the Valve Position Sensors:
The sensor circuits have to be considered galvanically connected to each other, in safety technical point of view. Verification of intrinsic safety must include the possibility of the interconnection of these intrinsically safe circuits. The functional galvanically separation remains unaffected. See also Electrical data for list of effected Valve Position Sensors.
3. Appropriate measures need to be taken to protect the Valve Position Sensors against mechanical damage due to impact if they are used within an ambient temperature range between – 60 °C and – 20 °C. An ambient temperature below – 60°C is not permissible.
4. The connection facilities of the Valve Position Sensors shall be installed as such that a minimum degree of protection of IP20 according IEC 60529 is complied with.
5. Valve Position Sensors PL…-F25…-N4… shall be installed within a surrounding enclosure so that a proper IP degree of protection of at least IP 20 according IEC 60529 is achieved at the installation site.
6. Inadmissible electrostatic charge of parts of the metal housing has to be avoided for the following types of Valve Position Sensors. Dangerous electrostatic charge of parts of the metal housing can be avoided by grounding these parts whereas very small parts of the metal housing (e.g. screws) do not need to be grounded:
· Valve Position Sensors with connection type V1, V16 or V18 may include relevant metal housing parts. See manufacturer instructions for more details.
7. When the following types of Valve Position Sensors are applied corresponding to the explosion group, apparatus group and EPLs tabulated below, inadmissible electrostatic charge of the plastic housing has to be prevented. The equipment shall be labelled with an appropriate warning note:
For use in Group I
For use in Group II
For use in Group II
For use in Group III
Valve Position Sensors which are marked with a gas group resp. with IIIA/IIIB/IIIC in column “Group …” need to be protected against dangerous electrostatic charges.
8. For the application of the following Valve Position Sensors in hazardous areas appropriate measures need to be taken to protect the free resin surface against mechanical damage if the free resin surface is accessible after installation:
9. The Valve Position Sensors PL...-F25…-N4... and NCN3-F31K-N… are being delivered without cable gland. Protection of cables and cable glands from tensile load and torsional stress is necessary, alternatively certified cable glands may be used.
10. Valve Position Sensors with valve circuits, the maximum values of the connected intrinsically safe valve have to be taken into account.