Overcurrent; Intended Use; Use In A Potentially Explosive Atmosphere - Emerson PACSystems RSTi-EP User Manual

User Manual
GFK-2958J

Overcurrent

Potentials of network adapters and power-feed modules must be disconnected either
simultaneously or in the order 24 V supply first, then the GND potential.
2.2

Intended Use

The products of the RSTi-EP series are intended for use in industrial automation. A RSTi-EP
station with network adapter and connected modules is intended for the decentralized
control of systems or sub-systems. Via the network adapter every module of a station is
integrated into a fieldbus structure and connected to the primary control unit. The RSTi-EP
products conform to protection class IP 20 (in accordance with DIN EN 60529), they can be
used in potentially explosive atmospheres rated as Zone 2 (as per Directive 2014/34/EU)
and in safe zones.
The observance of the supplied documentation is part of the intended use. The products
described in this manual may only be used for the intended applications and only in
connection with certified third-party devices or components.
2.3

Use in a Potentially Explosive Atmosphere

If RSTi-EP products are used in potentially explosive atmospheres, the following notes are
also applicable:
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Safety
Staff involved in assembly, installation and operation must be qualified to perform
safe work on electrical systems protected against potentially explosive
atmospheres.
The remote I/O-System RSTi-EP shall only be used in an area of not more than
pollution degree 2, as defined in IEC 60664-1.
For applications in potentially explosive atmospheres, the requirements according
to IEC 60079-15 must be observed, the housing enclosing the system must meet
the requirements of explosion protection type Ex n or Ex e and protection class IP54.
The IP54 enclosure must be accessible only by use of a tool.
Sensors and actuators that are located in Zone 2 or in a safe zone can be connected
to the RSTi-EP station.
The ambient temperature range -20°C to +60°C shall not be exceeded.
When the temperature under rated conditions exceeds 70 °C at the conductor or
conduit entry point, or 80 °C at the contact, the temperature specification of the
selected cable shall follow the actual measured temperature values.
A stabilized 24Vdc power supply with double or reinforced insulation shall be used.
When using modules EP-2714, EP-2814, and EP-1804 in explosive atmosphere:
Device shall be installed in an environment free of condensation, corrosives and
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conducting dusts.
If the switching or input voltage exceeds 63V, a transient protection device
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shall be provided that, limits the transients to a peak voltage of 500V or less.
For EP-2714 (Relay Module) only:
Chapter 2
Oct 2019
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