4
ELECTRICAL CONNECTIONS
26
IFC 300
www.krohne.com
06/2009 - 4000069802 - MA IFC 300 R03 en
4.3.3 Requirements for signal cables provided by the customer
Electrical safety
•
To EN 60811 (Low Voltage Directive) or equivalent national regulations.
Capacitance of the insulated conductors
•
Insulated conductor / insulated conductor < 50 pF/m
•
Insulated conductor / shield < 150 pF/m
Insulation resistance
•
R
iso
> 100 G
Ω
x km
•
U
max
< 24 V
•
I
max
< 100 mA
Test voltages
•
Insulated conductor / inner shield 500 V
•
Insulated conductor / insulated conductor 1000 V
•
Insulated conductor / outer shield 1000 V
Twisting of the insulated conductors
•
At least 10 twists per meter, important for screening magnetic fields.
INFORMATION!
If the signal cable was not ordered, it is to be provided by the customer. The following
requirements regarding the electrical values of the signal cable must be observed:
.book Page 26 Wednesday, June 10, 2009 4:20 PM
