H-System – Isolated Barriers and Termination Boards
Product Specifications
2023-03
7
2 Product Specifications
2.1 Function
Isolated barriers are used to protect intrinsically safe circuits in explosive areas.
In addition to the required current, voltage and power limitation, the isolated barriers have
a galvanic isolation between the field circuit and the controller.
The H-System isolated barriers are mounted on termination boards. Pre-wiring is possible
on termination boards. To close the signal circuit, the isolated barriers are simply plugged in.
The isolated barriers can be replaced during live operation when the wiring is connected.
Figure 2.1 Generic H-System termination board with isolated barriers
Generic and control-system specific termination boards are available in the H-System.
Termination boards can be adapted to specific input/output requirements.
These requirements can be implemented via
• Various connecting plugs to the controller
• Various terminals to the field device
• A large selection of isolated barriers
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