Siemens 3RQ4018-2AM08-0AA0 Output Coupler, 24V DC, 1CO Contact, Push-In Terminal

The Siemens output coupler is a high-performance relay module engineered for reliable signal isolation and switching within industrial automation environments. This compact device facilitates seamless communication between control systems and field devices, ensuring stable operation in demanding control cabinet applications. With its integrated relay design and efficient 24V DC operation, it provides a robust solution for managing electrical signals with precision and safety.

Advantages

This output coupler stands out due to its space-saving design, featuring a slim 6.2 mm width that allows for high-density mounting in control cabinets. The inclusion of Push-In terminal technology significantly reduces installation time by allowing for tool-free, secure wire connections that are resistant to vibration. Furthermore, the device offers a wide operating voltage range, ensuring consistent performance even when supply voltages fluctuate, while the 1CO contact configuration provides versatile switching options for various control logic requirements.

Suitable for

• Industrial automation and control systems
• Signal isolation between controllers and actuators
• Control cabinet wiring and space-constrained installations
• Switching low-to-medium power loads in industrial processes

When it may not be suitable

This device is not intended for switching high-power industrial loads that exceed its thermal current rating of 6A. It is also not suitable for environments requiring specialized protection against extreme moisture, dust, or corrosive gases without additional housing.

Key specifications

• Operating voltage: 24V DC (0.7-1.25 x Us)
• Contact configuration: 1 change-over (1CO) contact
• Thermal current: 6A
• Connection type: Push-In (spring-loaded) terminals
• Module width: 6.2 mm

How to use

To install the output coupler, mount the unit onto a standard DIN rail within your control cabinet. Connect the 24V DC control signal to the designated input terminals and wire your load to the 1CO contact terminals using the Push-In connection points. Ensure that the wire gauge used is compatible with the terminal specifications to maintain a secure electrical connection. Once wired, verify the signal path and ensure the control voltage is within the specified operating range before energizing the system.

What to consider before purchase

• Verify that the 24V DC control voltage matches your existing system architecture.
• Ensure the 6A thermal current rating is sufficient for your specific load requirements.
• Confirm that the 6.2 mm width fits within your current DIN rail layout.
• Check that your wiring infrastructure supports Push-In terminal connections.

Usage recommendations: Regularly inspect the terminal connections for signs of wear or loosening, especially in high-vibration environments. Ensure the device is kept free of debris to maintain optimal thermal dissipation.