Phoenix Contact: Terminal Block DIN Rail Assembly Selection Guide

The below diagram illustrates a typical terminal block assembly, which are useful for power distribution purposes, point-to-point connections, and similar functionality within an electrical control panel.

  1. Terminal Block – A standard terminal block provides a landing point for a wire, with another common wiring point on the other side of the block
    Ground Terminal Block – Provide a landing point similar to a standard terminal block, but have an electrical connection to the metal DIN Rail they are mounted on, thus providing an electrical ground.
  2. End Covers – Cover the exposed side of a terminal block, providing electrical isolation. Typically used on the last terminal block in a group.
  3. Plug-In Bridge – Allows multiple terminal blocks to be connected electrically, creating multiple wiring points with the same electrical potential.
  4. Partition Plate – Provides visual isolation between groups of terminal blocks. These should not be used in place of an end cover for electrical isolation
  5. End Clamp – Provides a physical “stop”, preventing terminal blocks from sliding along the DIN Rail. These are typically used on each end of a terminal block assembly.
  6. Marker – Provide labeling of terminal blocks for identification.
Typical terminal block DIN rail assembly

Nitin Patel is an Automation Specialist for AWC, Inc. in the Dallas, TX office. He is a Certified Siemens Technology Specialist for Factory Automation. With over 14 years of experience in industrial automation, he has a BS in Electrical Engineering from Texas A&M University.

Nitin Patel

Product Specialist

Nitin Patel

Product Specialist

Nitin Patel is an Automation Specialist for AWC, Inc. in the Dallas, TX office. He is a Certified Siemens Technology Specialist for Factory Automation. With over 14 years of experience in industrial automation, he has a BS in Electrical Engineering from Texas A&M University.
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