8
6.1 Temperature factor / continuous current rating
The time-current characteristic curve depends on the ambient temperature. To
determine the max. permitted load current multiply the nominal device current by
the temperature factor taking into consideration the series connection.
Ambient temperature [°C]
0
10
23
40
50
60
Temperature factor
1
1
1
0.95
0.90
0.85
With series installation the nominal device current can be max. 80% or has to be
overdimensioned accordingly. With increased temperature the load current war-
ning limit "warning limit typ. 0.8 x I
N
" is reduced by the temperature factor.
6.2 Fail-safe element
The load circuits are additionally protected by the circuit protection modules that
are equipped with a fail-safe element (integrated fuse). The fail-safe element is
adapted to the nominal current I
N
of the respective circuit protection module and
the respective wire cross-sections.
7 IO-Link
The load current warning threshold can be configured via the IO-Link inter-
face to provide a visual warning and a warning via IO-Link with a capacity
utilisation between 50 and 100 %.
The IO-Link devices can also be used as stand-alone devices without IO-
Link master.
Extended functions of the DF2101 head module via IO-Link:
• Min. / max. value generation of the measured current and voltage values for
each channel over any period of time
• Averaging of the measured current and voltage values for each channel over
any period of time
• Permanent switching on of individual channels in order to ignore the cyclic
data exchange (e.g. to guarantee the voltage supply of important devices). The
safety function remains active.
You will find the IODDs necessary for the configuration of an IO-Link device and
detailed information about parameter setting tools, process data structure, dia-
gnostic information and parameter addresses at www.ifm.com/gb/io-link.
