ABB CT-MFC.12 Multifunction Time Relay 1c/o 24-48VDC/24-240VAC

The ABB CT-MFC.12 is a versatile multifunction electronic time relay from the reliable CT-C range, engineered for precise timing control in industrial automation systems. This compact device offers seven distinct timing functions and seven selectable time ranges, spanning from 0.05 seconds to 100 hours, providing flexibility for a wide variety of operational requirements. It features a single changeover (SPDT) contact output and supports a broad input voltage range, ensuring compatibility with diverse electrical setups.

Advantages

This time relay stands out due to its high level of adaptability and robust construction. The inclusion of seven different timing functions allows for complex control sequences to be managed by a single unit, reducing the need for multiple specialized components. Its wide voltage range capability simplifies inventory management and installation, as it can operate across both DC and AC power supplies. Furthermore, the integrated status LED indicators provide immediate visual feedback, facilitating quick diagnostics and monitoring during operation.

Suitable for

• Industrial automation and control systems
• Timing sequences in manufacturing machinery
• Building management and lighting control
• Process control applications requiring precise time delays

This device may not be suitable for applications requiring high-current switching beyond its 4 A rating or for environments with extreme electromagnetic interference that exceeds standard industrial compliance levels. It is also not intended for use in circuits requiring floating control inputs, as the control input is voltage-related.

Key specifications

• Timing functions: 7
• Time ranges: 0.05 s to 100 h
• Output contact: 1 c/o (SPDT)
• Rated control supply voltage: 24-48 V DC / 24-240 V AC
• Output rating: 250 V / 4 A
• Dimensions: 17.5 x 63 x 70 mm
• Weight: 53 g
• Certifications: IEC 61812-1, UL 508, CAN/CSA C22.2 No.14

To use the ABB CT-MFC.12, mount the device onto a standard DIN rail within your control cabinet. Connect the power supply to the designated terminals, ensuring the voltage is within the specified 24-48 V DC or 24-240 V AC range. Select the desired timing function and time range using the front-mounted rotary switches. Connect your load to the changeover contact terminals. Once powered, the status LED will indicate the operational state of the relay.

What to consider before purchase

• Verify that your control circuit voltage matches the supported input range.
• Ensure the 4 A switching capacity is sufficient for your specific load requirements.
• Check available space on the DIN rail, as the unit width is 17.5 mm.
• Confirm that the required timing functions are covered by the seven available modes.

Usage recommendations

Always ensure that the power supply is disconnected before performing any wiring or adjustments to the rotary switches to prevent electrical hazards and ensure the longevity of the device.