KROHNE ALTOSONIC V12 EN - Manual (Page 29)

ELECTRICAL CONNECTIONS
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ALTOSONIC V12
www.krohne.com 04/2013 - 4002643502 - MA ALTOSONIC V12 R02 en
4.6 Cabling
We recommend to use screened cable with twisted pairs for connecting power, serial outputs
and the status signals. The screen can be used to connect the ground terminal.
Length of power supply cable vs diameter
Figure 4-6: Location of power connector
WARNING!
• Replace any unused cable gland by an Ex-d blind plug!
• The temperature rating of all cables must have a temperature rating of at least 65 ° C. In case
the process design temperature exceeds 65 ° C, the cables must have a temperature rating at
least as high as the maximum process design temperature.
WARNING!
In respect of the model of the cable glands used, the outer diameter of the cable must be
between 6.5 and 14 mm. Unused cable glands must be replaced by Ex d approved blind stops.
Length of cable between power supply and
flowmeter
[m] Required minimum copper cross section
70
2 x 0.5 mm 2 (AWG 20)
100
2 x 0.75 mm 2 (AWG 18)
200
2 x 1.5 mm 2 (AWG 15)
400
2 x 4 mm 2 (AWG 11)