ABB CT-ERC.12 Time Delay Relay, 1c/o, 24-48V DC / 24-240V AC

The ABB CT-ERC.12 is a professional-grade electronic time delay relay from the CT-C range, engineered for precise control in industrial and electrical systems. This single-function device provides a reliable ON-delay, or delay-on-make, operation, ensuring that switching processes occur exactly when required. With a versatile input voltage range supporting both 24-48V DC and 24-240V AC, it integrates seamlessly into various control environments. The unit is housed in a compact, grey enclosure and features clear LED status indicators for easy monitoring of operational states.

Advantages

This relay offers exceptional flexibility due to its wide supply voltage range, allowing it to be used in diverse power configurations without the need for multiple device types. Its seven selectable time ranges, spanning from 0.05 seconds up to 100 hours, provide high precision for a variety of timing tasks. The inclusion of a 1c/o SPDT output contact ensures robust switching capabilities for connected loads. Furthermore, the device is built to meet rigorous international standards, including IEC 61812-1 and UL 508, guaranteeing safety and reliability in demanding automation applications.

Suitable for

• Industrial automation systems
• Electrical control panels
• Process timing and sequencing
• Delayed start-up of machinery

This relay may not be suitable for applications requiring multi-function timing capabilities, as it is specifically designed as a single-function ON-delay device. It is also not intended for high-power switching applications that exceed the rated 4A output capacity without the use of an additional contactor or relay.

Key specifications

• Function: ON-delay (delay on make)
• Time ranges: 0.05 s to 100 h
• Control supply voltage: 24-48V DC / 24-240V AC
• Output contact: 1c/o (SPDT)
• Contact rating: 250V / 4A
• Dimensions: 17.5 x 63 x 70 mm
• Weight: 52 g

To use the ABB CT-ERC.12, mount the device onto a standard DIN rail within your control cabinet. Connect the control supply voltage to the designated input terminals, ensuring the voltage levels are within the specified range. Use the adjustment controls on the front of the unit to select the desired time range and duration for your specific application. Once powered, the LED indicator will provide visual feedback regarding the status of the relay, allowing for quick verification of the timing cycle.

What to consider before purchase

• Verify that the ON-delay function meets your specific control requirements.
• Ensure the 4A output rating is sufficient for your connected load.
• Check that the available control voltage matches the supported input range.
• Confirm the physical space in your control cabinet is adequate for the 17.5 mm width.

Usage recommendations

For optimal performance and longevity, ensure the relay is installed in an environment free from excessive dust, moisture, and extreme temperatures. Regularly inspect the terminal connections to ensure they remain secure and free from oxidation.