KROHNE OPTIWAVE 7300 IECEx - Manual (Page 13)

ELECTRICAL CONNECTIONS
3
13
OPTIWAVE 7300 C
www.krohne.com 10/2010 - 4000176502 - AD IECEX OPTIWAVE7300 R02 en
3.2.2 How to close the terminal compartment
Ex d / Ex tD applications
• Attach the terminal compartment cover 2. Turn the terminal compartment cover carefully to
prevent damage to the thread and the gasket.
• Make sure that the terminal compartment cover is tight.
• Use a 3 mm Allen wrench to attach the cover stop 1.
• Make sure that the cover stop 1 screw is tight.
3.3 Terminal tightening capacity
The terminal tightening capacity for curent output terminals 1 and 2 is:
3.4 Equipotential bonding system
There is a terminal in the terminal compartment and another on the side of the converter
support pillar that can be used equipotential bonding conductors.
3.5 Ex ia / Ex iaD equipment
3.5.1 How to connect the electrical cables
Cable entries are supplied on customer demand. If you supply the cable entries, this part must
have a degree of ingress protection IP≥6x (IEC 60529).
• Use the electrical connection procedure in the Handbook.
• If possible, use galvanically-isolated equipment.
• Supply the Ex i / Ex iD 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.
DANGER!
Ex d applications
Ex d applications Ex d applications Ex d applications
Make sure that the terminal compartment is correctly sealed. An explosion can cause death or
injury to personnel and/or damage to equipment. Obey the instructions that follow:
Type of wire Terminal tightening capacity
[mm²] [AWG]
Rigid 4 11
Flexible 2.5 13