Phoenix Contact PLC-RSC 24DC/21 Interface Relay, 1 PDT, 24V DC

The Phoenix Contact PLC-RSC 24DC/21 is a professional-grade interface relay module designed for robust signal switching and electrical isolation in industrial automation environments. This pre-assembled unit combines a high-quality miniature relay with a reliable screw-connection base terminal block, ensuring seamless integration into control cabinets. Engineered for efficiency and durability, it provides a dependable solution for managing electrical loads and signal processing in demanding technical applications.

Advantages

The relay module features a slim, space-saving design that optimizes control cabinet density. It supports efficient connection to system cabling through V8 adapters, significantly reducing wiring time. The unit is equipped with an RT III sealed relay for enhanced protection against environmental factors. It ensures safe electrical isolation between the coil and contact in accordance with DIN EN 50178 standards. Additionally, the module includes functional plug-in bridges and an integrated input circuit with interference suppression to maintain signal integrity.

Suitable for

• Industrial automation and control systems
• Signal switching in control cabinets
• Electrical isolation between control and load circuits
• Interface applications requiring 24V DC control

When it may not be suitable

This relay is intended for standard industrial control applications and may not be suitable for high-power switching tasks exceeding its rated contact capacity. It is also not designed for use in environments with extreme vibration or corrosive atmospheres that exceed the protection rating of the housing.

Key specifications

• Input voltage: 24V DC
• Contact configuration: 1 PDT (Single Pole Double Throw)
• Connection method: Screw connection
• Mounting type: DIN rail NS 35/7.5
• Protection rating: RT III sealed
• Standards: DIN EN 50178 compliant

How to use

Installation is straightforward due to the pre-assembled nature of the module. Simply snap the base terminal block onto a standard NS 35/7.5 DIN rail. Connect your 24V DC control signal to the input terminals and wire your load to the output contact terminals using the integrated screw connections. If multiple relays are used, you can utilize plug-in bridges to distribute power efficiently across adjacent modules.

What to consider before purchase

• Verify that the 24V DC control voltage matches your system requirements.
• Ensure the contact rating is sufficient for your specific load.
• Check available space on the DIN rail for the slim module footprint.
• Confirm compatibility with your existing wiring and cabling infrastructure.

Usage recommendations: Always ensure the power is disconnected before performing any wiring or maintenance tasks on the relay module. Regularly inspect the screw connections to ensure they remain tight and free from oxidation to maintain optimal electrical performance.