Types of protection of ET 200iSP
The types of protection include design and electrical measures relating to the equipment to
achieve explosion protection in the hazardous areas.
Table 2-5 Types of protection
Type of Protection Meaning Representation
Intrinsic safety i All voltages, currents, inductance and ca‐
pacitance occurring are limited by elec‐
trical measures (intrinsically safe) -
sparks or thermal eects capable of caus‐
ing ignition cannot occur.
Explosion-proof enclosure
d
The power supply module is installed in a
stable (explosion-proof) enclosure. If the
explosive atmosphere within the enclo‐
sure ignites, the enclosure will withstand
the explosion and contain the explosion
within the module.
Increased-safety enclo‐
sure e
The ET 200iSP must be mounted in an
additional enclosure in the hazardous
area Zone 1. The enclosure must have
the increased safety e type of protection.
This explosion protection type is an addi‐
tional measure to prevent high tempera‐
tures, sparks and arcing from forming
with a higher degree of certainty.
In the Zone 2 hazardous area, this type of
protection is unnecessary. Here, the
ET 200iSP only has to be mounted in an
enclosure suitable for zone 2 with at least
degree of protection IP54.
Encapsulation "m" In the 2 DO Relay UC60V/2A electronic
module, the internal relay is embedded
in a potting compound. This means that
an explosive atmosphere surrounding
the equipment can be ignited neither by
sparks nor by unacceptable heating.
Product overview
2.2 ET 200iSP in the Hazardous Area
ET 200iSP
Operating Instructions, 11/2022, A5E00247483-AK 33
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