Phoenix Contact PLC-RSC-24UC/21 Interface Relay, 24V AC/DC Coil, 1 SPDT Contact, 6A, DIN Rail, Green

In control cabinets across industrial automation, the Phoenix Contact PLC-RSC-24UC/21 interface relay reliably switches loads up to 6 A from a 24 V AC/DC control signal. This slim 6.2 mm wide module mounts directly onto a DIN rail and provides a single changeover contact, making it a practical choice for interfacing PLC outputs with actuators, contactors, or signal lamps.

Key specifications

• Nominal input voltage: 24 V AC/DC (range 19.2–30 V AC/DC)
• Contact configuration: 1 changeover (SPDT)
• Maximum switching voltage: 250 V AC/DC
• Maximum continuous current: 6 A
• Contact material: AgNi (silver nickel)
• Mounting: DIN rail NS 35/7.5 or NS 35/15
• Connection: screw terminals
• Status indicator: green LED
• Operating temperature: -40 °C to +60 °C
• Degree of protection: IP20
• Electrical life: 100,000 operations (6 A, 250 V AC, resistive)
• Mechanical life: 20,000,000 operations
• Coil power consumption: 220 mW
• Test voltage coil/contact: 4 kV AC (50 Hz, 1 min)
• Approvals: CE, EAC, UL, cULus Recognized

Why choose it

The PLC-RSC-24UC/21 combines a compact 6.2 mm housing with robust switching performance. The integrated green LED gives immediate status confirmation, reducing troubleshooting time. Its wide AC/DC input range and screw connections simplify installation in both new and retrofit projects.

Ideal use cases

• Interfacing PLC digital outputs to higher-current loads
• Signal multiplication or isolation in control panels
• Switching solenoids, contactors, and small motors
• Building automation and machine control systems

Good to know

The relay module is part of the Phoenix Contact PLC-INTERFACE series, known for pluggable design and easy maintenance. The green housing color aids quick identification in dense cabinets. Always verify coil polarity and load ratings before commissioning.