Schneider Electric CA4KN22BW3 Auxiliary Contact Block 2NO+2NC 24V DC

The Schneider Electric CA4KN22BW3 is a professional-grade auxiliary contact block engineered for integration with industrial control systems. This component provides reliable switching capabilities with a configuration of 2 normally open (NO) and 2 normally closed (NC) contacts, operating efficiently on a 24V DC control circuit. Designed for durability and precision, it serves as a critical interface in automation setups, ensuring consistent electrical signaling and operational safety.

Advantages

This auxiliary contact block stands out due to its robust construction and high-quality materials, which contribute to a long service life even in intensive industrial environments. Its compact design allows for space-saving installation within control panels, while the 24V DC operation makes it highly compatible with modern low-voltage automation systems. The device maintains stable performance across a broad temperature range, ensuring that switching operations remain accurate and reliable regardless of environmental fluctuations.

Suitable for

• Industrial automation control panels
• Motor starter assemblies
• Relay logic systems
• Electrical signaling and monitoring circuits

When it may not be suitable

This contact block is specifically designed for 24V DC control circuits and is not suitable for direct connection to high-voltage AC power lines or applications requiring different voltage ratings. It should not be used in environments that exceed the specified operating temperature range or in conditions where extreme moisture or corrosive agents are present without appropriate protective enclosures.

Key specifications

• Contact configuration: 2 NO + 2 NC
• Control circuit voltage: 24V DC
• Rated insulation voltage: 690V
• Operating temperature range: -25 to 50 °C
• Mounting type: Front mounting

How to use

The contact block is designed to be mounted onto compatible contactors or control relays. Ensure the power supply is disconnected before installation to prevent electrical hazards. Align the block with the mounting interface on the host device and secure it firmly according to the manufacturer's mechanical guidelines. Once installed, connect the control wires to the designated terminals, ensuring that the wiring matches the intended logic of your control system. After installation, perform a functional test to verify that the contacts actuate correctly when the coil is energized.

What to consider before purchase

• Verify the voltage compatibility of your existing control system.
• Ensure the contact configuration (2NO+2NC) meets your specific logic requirements.
• Check the physical space available in your control panel for mounting.
• Confirm compatibility with your specific contactor or relay model series.

Usage recommendations

Always ensure that the electrical load connected to the auxiliary contacts does not exceed the rated operational current to prevent premature wear or contact welding. Regular inspection of terminal connections is recommended to maintain optimal electrical conductivity.