Phoenix PLC-RSC Series – Detailed Product Overview

The Phoenix PLC-RSC series represents a professional-grade family of interface relay modules designed for signal switching, isolation, and control applications in industrial automation systems. Each module combines compact design, long service life, and high reliability, providing a seamless interface between control systems (PLCs, DCS, or controllers) and field devices such as sensors, actuators, and safety components.

1. Product Description

The Phoenix PLC-RSC (Relay Signal Conditioner) modules are used to convert control signals, switch loads, or isolate inputs and outputs across automation systems. These modules support 24 V DC operating voltage as standard and are available in multiple variants optimized for current handling, explosion protection, sensor input, or actuator control.

Their modular design enables quick installation on DIN rails and easy integration with terminal blocks or signal distribution systems. Many models also support plug-in relay replacement, reducing downtime during maintenance.

2. Technical Highlights

• Nominal Voltage: 24 V DC (standard); select models support 21 V to 28 V operating range.

• Switching Capacity: Up to 6 A (resistive load), 250 V AC / 30 V DC depending on type.

• Contact Configuration: SPDT (1 CO), DPDT (2 CO), or multi-channel.

• Insulation Voltage: 2.5 kV between input and output.

• Mounting: DIN rail (35 mm).

• Relay Status Indication: LED or mechanical flag.

• Optional Features:

  • Manual test lever (MS versions)

  • Sensor interface (SEN versions)

  • Actuator driver (ACT versions)

  • Explosion protection (EX, ATEX, or C1D2 certified)

  • High-current switching (HC versions)

  • Dual-channel isolation (21-21 versions)

3. Complete Model Reference Table

4. Application Fields

The PLC-RSC series is designed for a wide range of automation and process control applications:

• Industrial Automation Systems: PLC signal isolation and output control

• Process Engineering: Valve actuation, pump control, and signal feedback

• Building Automation: HVAC relay switching and alarm triggering

• Energy & Power: Monitoring and control in substations and power plants

• Hazardous Environments: ATEX or C1D2 versions suitable for Ex zones

• Machine Safety: Dual-channel and monitored relay configurations

5. Selection Recommendations

6. Advantages

• Compact modular design saves control cabinet space

• Plug-in relay for easy maintenance and replacement

• LED indication for operational status

• Optional manual test lever for functional checks

• Multiple certifications ensure global compliance (UL, CE, EAC, ATEX, C1D2)

• Flexible configurations for automation, safety, and process applications

7. Conclusion

The Phoenix PLC-RSC series provides a versatile and dependable interface solution for modern industrial control systems.
Whether used for standard switching, signal isolation, monitoring, or explosion-proof control, these relays ensure operational reliability, reduced wiring effort, and simplified maintenance.
With its wide product range, modular design, and comprehensive certification portfolio, the PLC-RSC series continues to be a preferred choice for engineers and system integrators seeking robust, compact, and intelligent relay interfaces.