Siemens ET 200S Manual page 195

Maintenance
If repair is necessary, the affected module must be sent to the production location.
Repairs can only be carried there.
Special Conditions
1. The ET 200S distributed I/O device must be installed in a cabinet or metal housing.
These must comply with the IP 54 degree of protection 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 50021).
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 7.2 (in accordance with EN 50021).
4. All devices (including switches, etc.) that are connected to the inputs and outputs of
fail-safe signal modules must be approved for EEx nA or EEx nC explosion
protection.
5. Steps must be taken to ensure that the rated voltage through transients cannot be
exceeded by more than 40 %.
6. Ambient temperature range: 0° C to 60° C
7. A sign containing the following warning must be put up inside the housing in an
easily visible position when the housing is opened:
Warning
The housing can only be opened for a short time (e.g. for visual diagnostics). If you
do this, do not operate any switches, remove or install any modules or disconnect
any electrical cables (plug-in connections).
You can disregard this warning if you know that the atmosphere is not hazardous
(i.e. there is no risk of explosion).
List of Approved Modules
You will find the list of approved modules under the ID 12443956 on the Internet:
http://www4.ad.siemens.de/view/cs/
Dezentrales Peripheriesystem ET 200S
EWA 4NEB 780 6024-01 07
General Technical Specifications
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