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Terminal blocks for the Ex area

Approvals in standard Ex

The right solution for every Ex application.

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Phoenix Contact offers a comprehensive range of Ex-approved connection technology for process engineering. As a result of the high-quality contact and insulation materials, the terminal blocks are particularly suitable for harsh, potentially explosive industrial applications. The terminal blocks approved for potentially explosive areas are standard terminal blocks. In addition to the usual approvals and in accordance with standard IEC/EN 60079‑7, they also have an IECEx and ATEX certificate from one of the testing institutes authorized by the EC.

Your advantages

Comprehensive range of standard terminal blocks for all connection technologies with Ex approval
Safe use, thanks to high-quality contact materials
Space-saving solutions, thanks to compact fuse and disconnect terminal blocks

Terminal blocks for “e” increased safety protection in Ex Zone 1 and 2 or 21 and 22

Terminal blocks for “e” increased safety protection

When the installation instructions are followed, the terminal blocks satisfy the requirements for “e” increased safety protection. The terminal blocks are therefore approved for installation in Zone 2 and, in particular, Zone 1, i.e., in the actual Ex area. The latter, however, is only on condition that the terminal blocks are installed in connection boxes. The connection boxes must also be approved for “e” protection and must have at least IP54 protection.

Detailed information on terminal blocks in the Ex e and Ex i area is available in the download area for the respective approved terminal blocks.

Terminal blocks for “i” intrinsic safety protection in Ex Zone 0, 1, and 2 or 20, 21, and 22

Terminal blocks for “i” intrinsic safety protection

No special approval is required for terminal blocks in applications with “i” intrinsic safety protection. In addition to Ex e approved terminal blocks, standard terminal blocks can also be used here, taking IEC/EN 60079-11 into consideration.

Ex e and Ex i terminal blocks in the same housing

In electrical equipment, such as junction boxes, both intrinsically safe circuits (Ex i) and increased safety circuits (Ex e) can be combined. Safe mechanical isolation and, if necessary, visual separation are prescribed here. It must be ensured that individual conductors do not come into contact with conductive parts of the other circuits when the wiring is disconnected from the terminal block.

Terminal blocks for Ex nA/Ex ec protection in Ex Zone 2 or 22

Terminal blocks for “nA/ec” protection

The comprehensive range of disconnect and fuse terminal blocks offers numerous solutions for potentially explosive areas. By combining the fuse lever, feed-through, and PE foot, shielded signal circuits can be wired using a single multi-level fuse terminal block, for example.

Further information