KROHNE ESKII ESK3 PA ATEX II2G Ex i EN - Manual (Page 8)

4
SAFETY FEATURES
8
ESK
www.krohne.com 09/2008 • 4000333901 MA ESK-Ex- II2G-AD-R01 en
SAFETY FEATURES
4.1 Electrical connection
The electronic signal outputs must be connected to intrinsically safe circuits. The maximum
safety-related values are listed below.
ESKII / ESK2A
Connection by way of a certified intrinsically safe isolation amplifier with the following
maximum values:
• Ui =30 V
• Ii =100 mA
• Pi =1,0 W
For the interconnection to intrinsically safe circuits note the following values:
• Ci = 20 nF
• Li ≈ 0 µH
ESK3-PA
Connection by way of a certified segment coupler with the following maximum values:
• Pi =5,32W
• Ui =24 V
• Ii =380mA
For the interconnection, the permissible limit values for the Profibus-PA in conformity with
the FISCO model must be observed.
Pinning
The electronic signal outputs are electrically connected at the terminals. The table shows
the polarity at the terminals
Connection lines
The connection lines for the intrinsically safe circuits must be selected in keeping with the
applicable installation standard (e.g. EN 60079-14 / VDE 0165).
Terminal Polarity of terminals for electronic signal output
Number ESKII ESK2A / ESK3-PA
11 + Not polarity sensitive
12 -
Terminal polarity of ESK ....
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