ELECTRICAL CONNECTIONS
3
11
DW 18 SERIES
www.krohne.com
11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
3.1 General notes
3.2 Ex c equipment
The Ex c-approved device does not have a switch option.
3.3 Ex ia equipment
3.3.1 How to connect the electrical cables
•
Use the electrical connection procedure in the Handbook.
•
Supply the Ex i equipment connected to the device. Use only certified intrinsically-safe
equipment.
•
Connect only to separate certified, intrinsically-safe circuits. Make sure that the electrical
circuit characteristics are not more than the values that follow.
3.3.2 Maximum intrinsically-safe values for the electrical circuit
•
U
i
is not given
•
I
i
≤
500 mA
•
C
i
=0 nF
•
L
i
=0
µ
H
Voltage is not given, but U and I must be intrinisically safe.
WARNING!
•
Use the applicable cable glands for the cable entry openings in the housing.
•
If ambient temperature >70
°
C / >158
°
F, use heat-resistant cables, cable glands and cable
entry plugs certified for continuous operation above +80
°
C / +176
°
F.
•
De-energize the circuit.
INFORMATION!
Cable entries are supplied on customer demand. If you supply the cable entries, this part must
have a degree of ingress protection IP
≥
65 (EN 60529).
