General
Terminal type	Barrier strip
Connection system	tension spring connection
Function	Through-wiring clamp
Material	hardened steel, tin-plated copper
Construction type	space-saving

The ZDK 2.5-2 terminal block from Weidmüller is a passage terminal block with spring clamp connection, designed for use in industrial electrical installations. It enables the secure and durable connection of multiple conductors in a row, with a compact design that saves space. The terminal block is suitable for use in enclosures and control systems where a reliable electrical connection under mechanical stress is required.

Terminal block
The ZDK 2.5-2 is a terminal block that offers multiple connection points in a row. This enables structured and clear wiring, especially in complex control systems. The terminal block is designed for use in enclosures and control systems where high packing density and reliable connections are required.

Functions and equipment in detail
The terminal block features a spring clamp connection, enabling quick and secure fastening of conductors. The spring clamp ensures that the contact is held under pressure, guaranteeing a durable electrical connection. The materials are selected to meet the demands of industrial environments: hardened steel provides high mechanical strength, while tin-plated copper offers optimal conductivity and corrosion protection.

Technology explained simply
The spring clamp connection operates without screw turning — the conductor is simply inserted into the terminal block and held securely by spring force. This reduces installation time and minimizes the risk of incorrect connections. The combination of hardened steel and tin-plated copper ensures high mechanical stability and low electrical resistance, which is important for reliable current transmission.

Compatibility and accessories
The ZDK 2.5-2 can be combined with various accessories to extend its functionality. These include cross connectors such as ZQV 2.5/2, ZQV 2.5/3, ZQV 2.5/4, ZQV 2.5/50, ZQV 2.5/6, ZQV 2.5/7, ZQV 2.5/8, ZQV 2.5/10, which enable parallel connection of multiple terminals. For marking connections, label carriers such as BZT 1 WS 10/5 or BZT 1 ZA WS 10/5 are available. Additionally, operating tools such as ZBW 1/3.5 or ZBW 1, end plates such as ZAP/TW ZDK2.5-2 BL, or covers such as ZAD 1/4-2 GE can be used. Test adapters such as ZTA 4 support connection testing.

Installation and mounting
Mounting is done in the usual way in enclosures or on mounting rails. The terminal block is inserted into the designated position, with the spring clamp securing the conductor connection. The compact dimensions facilitate installation in confined spaces. The use of accessories such as cross connectors or markings depends on the requirements of the installation.

Advantages in operation
The ZDK 2.5-2 provides a reliable and durable connection that remains stable even under mechanical stress. The quick mounting via spring clamp connection reduces installation time. The materials ensure a long service life and low maintenance. The combinability with various accessories extends the range of applications in different scenarios.

Spring clamp connection
The spring clamp connection is a proven connection system that operates without screw turning. The spring force securely holds the conductor in the terminal block, ensuring a durable electrical connection. This system is particularly advantageous in installations where quick mounting and high reliability are required.

Passage terminal block
As a passage terminal block, the ZDK 2.5-2 enables the connection of conductors in a row, with current flowing through the terminal block. This is especially useful in control systems where multiple connections in a line are needed.

Tin-plated copper
The tin-plated copper ensures high electrical conductivity and simultaneously protects against corrosion. This is crucial for the long-term stability of the connection, especially in humid or aggressive environments.

Hardened steel
The hardened steel provides high mechanical strength and withstands the stresses encountered in industrial applications. This ensures a long service life of the terminal block under operating conditions.

Compact design
The design is shaped to require minimal space in the enclosure, increasing packing density and facilitating installation in confined spaces.