ABB PLUTO S20 V2 CFS Programmable Safety PLC (2TLA020070R4700)

The ABB PLUTO S20 V2 CFS is a programmable safety controller designed for machine safety applications requiring up to SIL 3 (IEC 61508) and PL e (ISO 13849‑1). With 16 safety inputs and 8 safety outputs (solid‑state, PNP), it replaces multiple safety relays and provides flexible logic programming. The PLUTO series is known for its simplicity, using a graphic programming interface (Pluto Safety Manager). The V2 CFS model includes cross‑circuit detection, dual‑channel input monitoring, and integrated diagnostics.

Technical Specifications

• Model: PLUTO S20 V2 CFS (Article No.: 2TLA020070R4700)

• Safety Inputs: 16 (24V DC, dual‑channel capable)

• Safety Outputs: 8 (solid‑state, PNP, 0.5 A per channel, short‑circuit proof)

• Test Outputs: 2 (24V DC, 0.1 A for sensor supply)

• Programming: Pluto Safety Manager software (graphical function block)

• User Program Memory: 128 function blocks

• Response Time: 8 ms to 20 ms (depending on configuration)

• Communication: Serial (RS‑485) for Pluto bus (up to 31 units)

• Power Supply: 24V DC (19.2–30V)

• Power Consumption: 3 W typical

• Operating Temperature: -10°C to +55°C

• Protection Rating: IP20

• Dimensions: 110 mm × 90 mm × 55 mm

• Certifications: TÜV, UL, CE, CCC

Functional Description

The PLUTO S20 V2 CFS executes a safety program created by dragging and connecting function blocks (AND, OR, timers, flip‑flops, etc.) in Pluto Safety Manager. The software automatically verifies consistency and generates a checksum. The controller monitors its own hardware (watchdog, output cross‑checks) and can be connected to a PC for debugging. It supports up to 31 units on a Pluto bus, enabling distributed safety control.

Programming and Diagnostics

Programming requires the Pluto Safety Manager software, which runs on Windows. The program is downloaded via a USB‑to‑RS‑485 cable. The software also provides online monitoring of inputs, outputs, and internal variables. Diagnostic information is stored in a non‑volatile log. The controller features LED indicators for power, run, error, and per‑channel I/O status.

Applications

The PLUTO S20 is used in packaging machinery, robotics, woodworking equipment, conveyor systems, and hydraulic presses. Its compact size and high I/O count make it suitable for applications that previously required multiple safety relays.

Conclusion

The ABB PLUTO S20 V2 CFS offers an easy‑to‑use, highly reliable safety PLC solution, reducing wiring and increasing diagnostic capability for safety systems.