Installation In Connection With Intrinsically Safe Circuits; Repair; Disposal - Pepperl+Fuchs LAL-SRW Série Manuel

ALARM SYSTEM
Safety
1.7.4 Sensor cables
Sensor cables must not be installed in cable or conductor bundles together with other current
circuits. Avoid installing sensor cables parallel to other cables that may transmit interfering
signals, which impair the sensor signal and thus the alarm function. The sensor itself must not
be grounded.
If you extend the sensor cable, observe the applicable ATEX specifications with regard to color,
quality and durability. Use unshielded 2-wire cables with a cross-section of 1 mm² for each
sensor.
1.8

Installation in connection with intrinsically safe circuits

Installation of the intrinsically safe power circuits of the devices is permitted in potentially
explosive zones, whereby, in particular, safe separation from all non-intrinsically safe power
circuits must be guaranteed.
The intrinsically safe current circuits must be installed according to valid setup regulations.
For the interconnection of the intrinsically safe field devices and the intrinsically safe power
circuits of the associated devices, the respective maximum values of the field device and the
associated device with regard to explosion protection must be observed (proof of intrinsic
safety). EN 60079-14/IEC 60079-14 must be observed.
If the used sensors have no withstand test voltage (500 V according to EN 60079-11) between
the external conductive parts and the intrinsically safe circuits, it must be assumed that the
sensors and the corresponding intrinsically safe circuits have electrical contact with each other.
Verification of intrinsic safety circuits must then always include the possibility of connection of
all the intrinsically safe circuits.
1.9

Repair

The devices may not be repaired, changed or manipulated. If there is a defect, the product
must always be replaced with an original part.
1.10

Disposal

Disposal of devices and their packaging material must be performed in compliance with the
applicable laws and guidelines of the corresponding country.
The devices do not contain batteries which need to be disposed of separately from the
products.
EN
EN - 7