General
Terminal type	2-wire earth conductor terminal
Conductor cross section	0,08–4 mm²
Colour	Green-yellow
Text	Centrical
Mounting	For mounting rail 35 x 15 mm and 35 x 7.5 mm
Technology	CAGE CLAMP®

The WAGO 281-907 is a 2-conductor protective earth terminal block, specifically designed for use in electrical installations. It enables safe and reliable connection of protective earth conductors with a cross-section up to 4 mm². The terminal block is finished in green-yellow, matching the international identification for protective earth conductors, and features a central marking for clear identification of the connection. It is designed for mounting on support rails with dimensions 35 x 15 mm and 35 x 7.5 mm, ensuring universal use in various enclosures and distributions. The CAGE CLAMP® technology ensures a stable and durable connection, where the conductor is held in a clamp by a pressure mechanism without requiring additional tools such as screwdrivers.

Applications

The terminal block is used in industrial electrotechnics as well as in building electrics, where secure earthing of electrical devices and systems is required. It is particularly suitable for applications involving high mechanical stress or frequent mounting and dismounting operations, as the CAGE CLAMP® technology ensures a robust and resilient connection. Typical use is in enclosures, distributors, and control systems, where the terminal block is mounted on standard support rails.

Functions and Equipment in Detail

The 2-conductor protective earth terminal block 281-907 enables the connection of two conductors with a maximum cross-section of 4 mm². The central marking facilitates identification and documentation of connections, which is advantageous during maintenance and inspection work. The green-yellow colouring corresponds to the standard for protective earth conductors and supports clear assignment within the electrical system. The terminal block is designed for use in enclosures and distributors, where secure earthing is essential.

Technology Explained Simply

The CAGE CLAMP® technology integrated in the terminal block operates without screws. Instead, the conductor is inserted into a clamp, which is held securely by a pressure mechanism. This mechanism ensures a reliable electrical connection that remains stable even under vibrations or temperature fluctuations. The terminal block is designed for conductor cross-sections from 0.08 to 4 mm², enabling broad application with various cable types. Mounting is done on standard support rails, with the terminal block securely fixed by an integrated retention device.

Compatibility and Accessories

The terminal block is compatible with support rails of dimensions 35 x 15 mm and 35 x 7.5 mm, which are widely used in industrial electrotechnics. Various accessories are available to extend functionality, such as group label carriers, warning covers, bridging combs, or profile cover carriers. These components can be used to improve structuring and labelling of enclosures. Combining with WMB labels or multi-labels allows precise marking of the terminals, which is helpful for maintenance and documentation.

Mounting and Installation

Mounting of the terminal block is done by simply hanging it onto the support rail. The terminal block features an integrated retention device ensuring secure fastening. Connection of conductors is achieved by inserting the cables into the clamp and then pressing the actuation lever, which securely clamps the conductor. No additional tools are required. Installation is therefore quick and easy, even for technicians without special tools.

Advantages in Operation

The terminal block provides a reliable and durable connection that remains stable even under demanding operating conditions. The CAGE CLAMP® technology reduces the risk of contact loss and increases safety in the electrical system. The green-yellow colouring and central marking facilitate identification and documentation, making maintenance and inspection more efficient. Compatibility with standard support rails enables universal use across various application areas.