ABB CR-M230AC4 Interface Relay, 230V AC, 6A, 4c/o

The ABB CR-M230AC4 is a high-performance pluggable interface relay engineered for reliable electrical switching within industrial automation and control systems. This miniature relay is designed to be installed into a compatible ABB CR-M socket, allowing for seamless integration and DIN rail mounting. With a 230V AC coil voltage and four changeover (c/o) contacts, it provides a versatile solution for managing multiple circuits simultaneously from a single control signal.

Advantages

This interface relay stands out due to its robust construction and user-friendly features that simplify maintenance and commissioning. The inclusion of an integrated manual test button allows operators to actuate the relay contacts manually, which is essential for verifying system functionality during installation or troubleshooting. Furthermore, the built-in LED indicator provides clear visual feedback regarding the status of the relay coil, ensuring that operators can quickly identify when the device is energized. Its compact design and compatibility with a wide range of accessories, such as logic sockets and function modules, make it a highly adaptable component for complex electrical panels.

Suitable for

• Industrial automation and control panels
• Signal isolation between control and load circuits
• Switching multiple electrical loads with a single input
• Electrical system commissioning and testing

When it may not be suitable

This relay is not intended for applications requiring high-power switching beyond its 6A current rating or for environments where the control voltage differs from the specified 230V AC. It is also not suitable for direct outdoor installation without a protective enclosure to shield it from moisture and environmental contaminants.

Key specifications

• Coil voltage: 230V AC
• Contact configuration: 4 changeover (c/o) contacts
• Maximum current rating: 6A
• Operating frequency: 50/60 Hz
• Dimensions: 21.2 x 27.5 x 35.6 mm
• Weight: 33 g

How to use

To use the ABB CR-M230AC4, first ensure that a compatible ABB CR-M socket is securely mounted onto a DIN rail. Insert the relay into the socket until it clicks into place. Connect the control wiring to the coil terminals and the load wiring to the output contact terminals according to the wiring diagram. Once installed, the relay will operate automatically when the 230V AC control signal is applied. The integrated test button can be used for manual operation by pressing and locking it, which is useful for testing the connected circuits without an active control signal.

What to consider before purchase

• Ensure the control supply voltage matches the 230V AC requirement.
• Verify that the load current does not exceed the 6A limit.
• Check if you require additional accessories such as logic sockets, markers, or function modules.
• Confirm that the mounting space is sufficient for the relay and socket assembly.

Usage recommendations

Always disconnect the power supply before installing or removing the relay from its socket to prevent electrical shock. Ensure that the test button is returned to its normal operating position after manual testing to allow the relay to function correctly under automatic control.