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.
- 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.
- End Covers – Cover the exposed side of a terminal block, providing electrical isolation. Typically used on the last terminal block in a group.
- Plug-In Bridge – Allows multiple terminal blocks to be connected electrically, creating multiple wiring points with the same electrical potential.
- Partition Plate – Provides visual isolation between groups of terminal blocks. These should not be used in place of an end cover for electrical isolation
- 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.
- Marker – Provide labeling of terminal blocks for identification.