Quick and reliable: the new push-in wiring blocks
RELATED PRODUCTS
PRODUCT INFORMATION
MANUFACTURED BY Schneider Electric
RELEASE DATE
July 31, 2025
CATEGORY
HMI, OI
Schneider Electric has introduced a new wiring technology for Schneider Electric Harmony XB4 and XB5 Pushbutton ranges. The company continues to update its Harmony offering to improve usability and meet evolving interface requirements. The compact push-in contact and indicator units support this approach and offer a simplified connection method.
Various contact and pilot light units are available, featuring different tool-free wiring methods based on their installation technology. Faston and plug-in connectors are suited to specific uses, while spring clamp connections are commonly used in general-purpose settings.
The spring clamp opens when the lever is moved, allowing insertion of one or more wires per terminal. Returning the lever to its original position secures the wire and maintains electrical continuity during contact activation by a pushbutton control device.
While this technology has demonstrated durability, certain design limitations may have restricted broader use of the fast connector. These include the inability to stack contacts on multiple levels, which can pose challenges for buttons requiring multiple functions. The push-in connection block concept was developed to address these issues. Schneider aims to enhance functionality in a more compact and user-friendly design.
This wiring method is already used in products such as terminal blocks and relay sockets, and the technology is now suitable for integration into the Harmony XB4 and XB5 contact and indicator blocks. The design allows users to connect wires directly to the block behind the pushbutton head. Users can insert the cable into one of the four terminals to complete the connection. In machines that require a large number of components, reducing installation time can help lower overall manufacturing costs.
Once inserted, the wires can be removed using a release button located at the back of the blocks, which is operated with a flathead screwdriver. Because the wire remains in constant contact with the spring mechanism, vibrations during machine operation are less likely to affect the connection, which may occur with screw blocks. No routine re-tightening is required, simplifying maintenance and reducing installation time.
Switching from a spring clamp to a push-in connection allows the quick-connect range to reduce its overall width by 37%, helping it fit into compact areas such as control stations. Flush-mounted designs also help conserve space behind panels and support a more streamlined layout.
The compact push-in are designed to improve installation efficiency and expand application options for users of the 22mm XB4/XB5 range. They incorporate features intended to enhance usability and streamline wiring tasks.
Edited by Puja Mitra, WTWH Media, for Control Engineering, from a Schneider Electric news release.
