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Product Specifications
2
Product Specifications
2.1
Function
The Ethernet Isolator may be installed within the non-explosion-hazardous are
and the Zone 2 hazardous area. As an associated apparatus it is certified to lead
intrinsically safe instrumentation into Zone 0 and Zone 1 hazardous areas. It is a
1:1 data connector with automatic speed detection. Data is passed through with-
out buffering.
The Ethernet Isolator can be used for any Ethernet-based application. This
includes current and future PROFINET and FOUNDATION Fieldbus HSE installa-
tions. This intrinsically safe solution is well suited for:
•
Mobile machinery and equipment in harsh environments
•
Assemblies that are often removed, replaced or reworked
•
In situations where cable breakage is a risk
The intrinsically safe energy limitation eliminates any need for protected installa-
tion. Intrinsically safe Ethernet can be connected and disconnected during normal
plant operation without requiring a hot work permit.
The galvanic isolation eliminates the need for equipotential bonding between the
safe area and the hazardous area. Significant cost savings are realized through
reduced installation material and effort.
The internal design of the Ethernet Isolator includes a galvanically isolating fiber
optic bridge and a voltage and current limiting circuit. Additionally it follows the
stringent requirements for energy-efficient design. Low heat dissipation leads to
reduced cooling requirements and if necessary highest packing density in the
installation cabinet or equipment.
2.2
Typical Applications
The figure below (
see Figure 2.1 on page 9) shows the typical usage of Ether-
net Isolators within an Ethernet network. Using standard Ethernet cable (for cable
parameters see chapter 2.4) and hardware, an up to 100 m long intrinsically safe
connection can be established to connect the hazardous area and the network in
the safe area. It is also a fast and easy way to bridge the Ethernet network through
a Zone 0 or Zone 1 hazardous area. One Ethernet Isolator is required at each end
of the intrinsically safe line.
The Ethernet Isolator requires a 24 VDC power supply.
Table 2.1 Ethernet Isolator
