Operation
EL6910 25Version: 1.4.1
4.3 Operation in potentially explosive atmospheres (ATEX)
4.3.1 Special conditions
WARNING
Observe the special conditions for the intended use of Beckhoff fieldbus
components in potentially explosive areas (directive 2014/34/EU)!
The certified components are to be installed in a suitable housing that guarantees a protec-
tion class of at least IP54 in accordance with EN 60529! The environmental conditions dur-
ing use are thereby to be taken into account.
If the temperatures during rated operation are higher than 70 °C at the feed-in points of ca-
bles, 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 temperature values!
Observe the permissible ambient temperature range of 0 to 55 °C when using Beckhoff
fieldbus components in potentially explosive atmospheres!
Measures must be taken to protect against the rated operating voltage being exceeded by
more than 40% due to short-term interference voltages!
The individual terminals may only be unplugged or removed from the Bus Terminal system
if the supply voltage has been switched off or if a non-explosive atmosphere is ensured!
The connections of the certified components may only be connected or disconnected if the
supply voltage has been switched off or if a non-explosive atmosphere is ensured!
The fuses of the EL92xx power feed terminals may only be exchanged if the supply voltage
has been switched off or if a non-explosive atmosphere is ensured!
Address selectors and ID switches may only be adjusted if the supply voltage has been
switched off or if a non-explosive atmosphere is ensured!
The fundamental health and safety requirements are fulfilled by compliance with the following standards:
• EN 60079-0: 2103
• EN 60079-15: 2011
4.3.2 Identification
Beckhoff fieldbus components that are certified for use in potentially explosive atmospheres bear one of the
following markings:
II 3 G Ex nA II T4 KEMA 10ATEX0075 X Ta: 0 - 55°C
or
II 3 G Ex nA nC IIC T4 KEMA 10ATEX0075 X Ta: 0 - 55°C
4.3.3 Date code and serial number
The TwinSAFE terminals bear a date code, which is composed as follows:
Datecode: CWYYSWHW
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