BECKHOFF EL9xxx - Manual (Page 71)

Mounting and wiring
5.6 ATEX ­ Special conditions
WARNING
Observe the special conditions for the intended use of Beckhoff fieldbus
components in potentially explosive areas (directive 94/9/EU)!
ü Conditions
a) The certified components are to be installed in a suitable housing that guarantees a
protection class of at least IP54 in accordance with EN 60529! The environmental con­
ditions during use are thereby to be taken into account!
b) If the temperatures during rated operation are higher than 70°C at the feed­in points of
cables, lines or pipes, or higher than 80°C at the wire branching points, then cables
must be selected whose temperature data correspond to the actual measured tempera­
ture values!
c) Observe the permissible ambient temperature range of 0 ­ 55°C for the use of Beckhoff
fieldbus components in potentially explosive areas!
d) Measures must be taken to protect against the rated operating voltage being exceeded
by more than 40% due to short­term interference voltages!
e) The individual terminals may only be unplugged or removed from the Bus Terminal sys­
tem if the supply voltage has been switched off or if a non­explosive atmosphere is en­
sured!
f) The connections of the certified components may only be connected or disconnected if
the supply voltage has been switched off or if a non­explosive atmosphere is ensured!
g) The fuses of the KL92xx power feed terminals may only be exchanged if the supply
voltage has been switched off or if a non­explosive atmosphere is ensured!
h) Address selectors and ID switches may only be adjusted if the supply voltage has been
switched off or if a non­explosive atmosphere is ensured!
Standards
The fundamental health and safety requirements are fulfilled by compliance with the following standards:
• EN 60079­0: 2006
• EN 60079­15: 2005
EL9xxx 71 Version 3.1