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Level limit switch
Series RN 4000
Technical information / Instruction manual
Zone classification
Useable in zone Category
Equipement
Protection Level
(EPL)
Dust applications
20, 21, 22
1 D
Da
21, 22
2 D
Db
22
3 D *
Dc
General Notes
Marking
Devices with Ex approval are marked on name plate.
Process pressure
Devices with Ex Approval are approved for atmospheric pressure.
A detailed explanation is given below for ATEX and applies analogously for other Ex approvals:
The scope of the ATEX directive is generally limited to atmospheric pressure, see ATEX directive
2014_34_EU Chapter 1 Art.2 (4).
Atmospheric pressure is defined as absolute pressure 0.8bar to 1.1bar, see ATEX guideline §50 and IEC
60079-0 chapter 1 Scope.
The technical background is that an explosive atmosphere which is compressed (overpressure) or
released (underpressure) can exhibit different explosion behaviour than under atmospheric conditions.
The standards for the types of protection against explosion (IEC 60079 series), on which a type
approval according to the ATEX directive is based, are designed for atmospheric conditions and do not
automatically cover deviating pressure conditions.
Thus, an ATEX type approval issued in accordance with this directive only covers atmospheric pressure.
This applies to all manufacturers.
A deviating operating pressure can be assessed and approved by an expert for the respective
application.
Regardless of this, the design of the level indicators is suitable for a vessel overpressure / underpressure
in accordance with the specified technical data.
Process and ambient
temperature
The permitted temperature ranges are marked on the name plate.
* in case of conductive dust
additional requirements for the
installation are necessary.
Notes for use in Hazardous Locations
Electrostatic charge
The apparatus shall be installed in way that danger caused by electrostatic charges is avoided.
Specific condition of use
Year of manufacturing
2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029
Marking code
K
L
M
N
P
R
S
T
U
V
W
X
ATEX: Year of manufacturing
Marking on the name plate is done according to IEC 60062 as follows:
RN 4000
gi010121
19
Rotonivo
®
1
2
3
4
5
6
7
8
9
10
11
12