Siemens SIMATIC S7-300 Manual De Producto página 544

Maintenance
If repair is necessary, the affected subassemblies/modules must be sent to the
production location. Repairs can only be carried out there.
Special conditions for:
KEMA 01
KEMA 02
KEMA 03
1. Subassemblies/modules must be installed in an adequate housing. This must
comply with the IP 54 degree of protection (according to EN 60529) as a
minimum. The environmental conditions under which the equipment is installed
must be taken into account. There must be a manufacturer's declaration for
zone 2 available for the housing (in accordance with EN 60079-15).
2. If a temperature of > 70 °C is reached in the cable or at the cable entry of this
housing under operating conditions, or if a temperature of > 80 °C can be
reached at the junction of the conductors under operating conditions, the
temperature-related properties of the cables must correspond to the
temperatures actually measured.
3. The cable entries used must comply with the required IP degree of protection
and Section 6.2 (in accordance with EN 60079-15).
4. Steps must be taken to ensure that the rated voltage through transients cannot
be exceeded by more than 40 %.
Special Conditions for KEMA 04 ATEX 1151X
1. The PROFIBUS bus connector plugs must be installed so that they are
protected from mechanical hazards.
2. If the ingress of moisture and dust cannot be ruled out, the PROFIBUS bus
connection plugs series 6ES7972 ... are to be installed in a suitable housing.
This housing must guarantee at least the protection type IP 54 (according to
EN 60529).
3. The PROFIBUS bus connection plugs must be attached according to
instructions using the supplied screws.
4. The connecting or disconnecting of live conductors or operation of device
switches, e.g. for installation or servicing purposes is only allowed when it has
been ensured that the area is not explosive.
6
English
ATEX 1238X
ATEX 1096X
ATEX 1125X, ATEX 1226X, ATEX 1228X
Product Information on the Use of subassemblies/modules in a Zone 2 Hazardous Area
A5E00352937-03