ELECTRICAL CONNECTIONS
3
47
OPTIFLEX X200
www.krohne.com
09/2018 - 4006564001 - AD IECEX OPTIFLEX x200 R01 en
3.7.2 How to connect the electrical cables
Cable glands are supplied on customer demand. If you supply the cable glands, this part must
have a degree of ingress protection IP
≥
6X (IEC 60529). We recommend that you use a part that
has a degree of ingress protection IP
≥
67. Make sure that the cable gland is sealed.
Terminal compartment
•
If you connect electrical wires to the terminals in the flameproof terminal compartment, use
approved flameproof cable glands (M20×1.5 or
½
NPT). The cable glands must have a test
certificate that agrees with IEC 60079-1. Obey the instructions given on the test certificates.
Make sure that the tightening capacity of the cable gland is applicable to the diameter of the
electrical wire.
•
If you use conduits to connect electrical wires to the terminals in the flameproof terminal
compartment, obey the instructions that follow. Make sure that the conduits are correctly
attached and the flameproof compartment is sealed. The flameproof joint must have a
minimum thread length of 8 mm / 0.32
¨
. The conduits must have a test certificate that agrees
with IEC 60079-1. Use conduit stopping boxes that agree with precautions given in the test
certificate and data in standards related to the installation of the conduit.
•
If you connect electrical wires to the terminals in the dustproof terminal compartment, use
approved flameproof cable glands (M20×1.5 or
½
NPT). The cable glands must have a test
certificate that agrees with IEC 60079-31. Obey the instructions given on the test certificates.
Make sure that the tightening capacity of the cable gland is applicable to diameter of the
electrical wire.
Obey the instructions that follow:
•
Use the electrical connection procedure in the handbook.
Figure 3-14: Remote (Field) version: Compartments in Ex ia/db- and Ex ia/tb-approved equipment
1
Electronics block (Ex ia) compartment
2
Terminal (Ex d / Ex t) compartment
INFORMATION!
The flamepath dimensions are better than the values specified in the International Standard
IEC 60079-1 (minimum length 13.9 mm and maximum gap 118
µ
m).
WARNING!
Use only Ex d-approved cable glands and adaptors for Ex d applications. Use only Ex t-approved
cable glands and adaptors for Ex t applications.