Product Overview

The DX581-S (1SAP284100R0001) is a specialized functional safety I/O module belonging to the ABB AC500-S safety PLC family. Engineered for high-integrity industrial environments, this module provides the interface for safety-related digital inputs and outputs, as well as pulse signals. It is certified for use in systems requiring up to SIL3 (IEC 61508) or PLe (ISO 13849-1) levels, depending on the wiring configuration. The DX581-S allows for the seamless integration of safety sensors and actuators into the broader S500 I/O station, ensuring rigorous monitoring and fail-safe performance.

Technical Specifications

The DX581-S (1SAP284100R0001) is built for precision and reliability in mission-critical automation loops.

• Manufacturer: ABB (Origin: Germany)

• Part Number: DX581-S

• Order Code: 1SAP284100R0001

• Safety Category: SIL2 / SIL3 (Functional Safety)

• Safety Digital Inputs (SDI): 8 Channels (Configurable as 8 x SIL2 or 4 x SIL3)

• Safety Digital Outputs (SDO): 8 Channels (Up to SIL3 depending on configuration)

• Pulse Outputs: 4 Channels for sensor test and crosstalk detection

• Input Voltage: 24 VDC (Nominal)

• Output Current: 0.5 A per channel (Short-circuit proof)

• Power Supply Range: 20.4 V to 28.8 VDC

• Input Current per Channel: 7 mA

• Configurable Delay: 1 ms to 500 ms (Input debounce)

• Ingress Protection: IP20

• Operating Temperature: -25°C to +60°C

• Dimensions: 76 mm (H) x 67.5 mm (W) x 62 mm (D)

• Mounting: Standard DIN Rail (integrated into AC500 subracks)

Key Functional Safety Features

• SIL3 Compliance: The DX581-S (1SAP284100R0001) supports dual-channel evaluation of sensors, enabling SIL3 safety functions such as emergency stops and light curtains.

• Integrated Test Pulses: Four dedicated pulse outputs allow the system to detect short circuits to external voltage or crosstalk between input lines, ensuring loop integrity.

• Advanced Diagnostics: Real-time monitoring of output voltage and current allows the module to detect wire breaks or internal hardware failures instantly.

• Versatile Configuration: Part of the AC500-S range, this module can be mixed with non-safety I/O on the same bus, allowing for cost-effective system scaling.