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Installation of signal processing and display devices on the BNA…EX
bypass level indicator in explosion risk areas
When attaching the signal processing and display devices (e.g. MG magnetic switch) to the
BNA…EX bypass level indicator, the upper limit values of the field device and the BNA…EX
bypass level indicator must be complied with within the framework of explosion protection (proof of
inherent safety). Laws and guidelines applying to the use or intended application of the equipment
must be complied with. Only signal processing and display device certified for the given application
conditions according to ATEX may be connected. EEC type certifications must be complied with.
Compliance with any "Special Conditions" stipulated therein is of particular importance.
Example of mounting ( Level Sensor MG... )
The description provided here must be considered as being a means of orientation for
the mounting-on possibility provided by location-specific conditions.
Please also refer to the assembly and operating instructions of the add-on equipment units
Use thightening straps or fastening clips to fasten
the Sensor MG... to the base equipment unit
(bypass chamber)
Depending on the magnet system, the distance
between the position sensor (magnet) and the
Sensor MG... tube should not exceed 8 mm.
It is not permissible to drill into or through the
bypass tube or to weld it directly.
Please note the material pairings.
Number of recommended mounting brackets or tightening straps
Distance centre-to-centre up to
1000mm
2 brackets
Distance centre-to-centre above 1000mm add 1 bracket for each initial 1000mm
The brackets must be fitted at equal distances along the entire length of the pipe.
1
Level Sensor MG...
2
tensioning straps
3
Magnetic roller display
4
Cheese-head screws or
similar
5
Spacers
6
Mounting clips
7
Mounting brackets
