Siemens SIMOTICS XP 1MD4, Operating Instructions And Installation Instructions, Page: 52 / 128

● Requirements according to IEC/EN 60079-14 when used in Zones 1, 2 or 21, 22
● Configuration notes
6.2 Connecting
6.2.1 Terminal boxes with type of protection "Ex d"
With terminal boxes of protection type "Ex d", the type and size of the cable entry threads and
the type of protection are specified on the terminal box.
WARNING
Loss of type of protection "Ex d" when using cable and conductor entries, piping systems as
well as screw plugs with a basic design.
An explosion can occur. This can result in death, serious injury, or material damage.
Only use sealing plugs with type of protection "Ex d" that have been tested and certified in
accordance with IEC / EN 60079-1 to close openings that are not to be used.
6.2.2 Terminal boxes with type of protection "Ex e"
WARNING
If the seal of the pressure relief flap (preset breaking point) in the lower section of the terminal
box is damaged, then the explosion type of protection is no longer guaranteed.
An explosion may occur during operation. This can result in death, serious injury or material
damage.
The damaged seal may only be repaired with original sealing material.
WARNING
No cable or line entries or simple designs of sealing plug may be used on terminal boxes with
the "Ex e" type of protection.
An explosion may occur during operation. This can result in death, serious injury or material
damage.
● Use only cable entries that have been tested and certified in accordance with
IEC / EN 60079–7 .
● Use only sealing plugs that have been tested and certified in accordance with
IEC / EN 60079–7 to close openings that are not to be used.
Electrical connection
6.2 Connecting
SIMOTICS XP 1MD4/1MD5
52
Operating Instructions 05/2015