ABB DI581-S B1 1SAP284000R0001
ABB DI581-S B1 1SAP284000R0001
ABB DI581-S B1 1SAP284000R0001
ABB DI581-S B1 1SAP284000R0001
ABB DI581-S B1 1SAP284000R0001

ABB DI581-S | 16-Channel Sink/Source Digital Input for AC500 PLC

  • Brand: ABB
  • Model: 1SAP284000R0001 DI581-S
  • Product Type: Digital Input Module
  • Series: AC500 Series
  • Core Function: Acquires 16-channel 24V DC digital signals from field devices and transmits data to AC500 PLC CPUs for logic processing.
  • Key Specs: 16 isolated channels, 24V DC sink/source input, 500V AC isolation.
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Description

DI581-S: Product Overview
The DI581-S is a 16-channel digital input module designed for integration into ABB AC500 series programmable logic controllers (PLCs). Its role is to serve as a field-to-controller interface, acquiring discrete signals from industrial devices such as proximity switches, limit switches, pushbuttons, and contactor auxiliary contacts. The module processes these 24V DC signals, conditions them for noise immunity, and transmits the data to the AC500 CPU for execution of control logic.
As part of the AC500 I/O family, the module leverages a platform recognized for its modular architecture, scalability, and seamless integration with engineering tools like ABB Automation Builder and third-party software such as CODESYS V3. The benefits of this platform include simplified system design, reduced wiring complexity through high-density modules, and unified configuration workflows that streamline commissioning and maintenance. The DI581-S enables engineers to expand the I/O capacity of an AC500 system in a cost-effective manner while maintaining system integrity.

ABB DI581-S B1 1SAP284000R0001

ABB DI581-S B1 1SAP284000R0001

DI581-S: Technical Specifications
  • Model Number: 1SAP284000R0001 DI581-S
  • Manufacturer: ABB
  • Product Type: Digital Input Module
  • Number of Channels: 16 (individually configurable)
  • Input Type: 24V DC, sink/source
  • Input Voltage Range: 18-30V DC
  • Isolation Voltage: 500V AC (channel-to-bus)
  • Signal Response Time: <5 ms
  • Operating Temperature: -25°C to +60°C
  • Humidity Range: 5% to 95% non-condensing
  • Power Supply: 24V DC (from AC500 rack backplane)
  • Power Consumption: 1.5W (typical)
  • Dimensions: 25mm x 128mm x 115mm (width x height x depth)
  • Weight: 0.15kg
  • Certifications: CE, UL, cULus, RoHS
Core Features & Customer Value​
The DI581-S module provides several features that translate into operational value. Its 16-channel density reduces cabinet footprint and minimizes the number of modules required in systems with numerous discrete sensors, such as a packaging line or a motor control center. This consolidation simplifies wiring, lowers material costs, and reduces potential points of failure.
Each channel offers configurable sink/source input capability, allowing engineers to connect a variety of field devices without needing external adapters. This flexibility is beneficial during system upgrades or retrofits. The 500V AC channel-to-bus isolation is critical for maintaining signal integrity in electrically noisy industrial environments, protecting the PLC from ground loops and voltage transients.
The module is designed for hot-swapping, permitting replacement without de-energizing the I/O rack. This capability minimizes unplanned downtime, a significant advantage in continuous process industries. Integration with ABB Automation Builder software enables efficient configuration and diagnostics, allowing maintenance teams to quickly identify and resolve field device issues.

ABB DI581-S B1 1SAP284000R0001

ABB DI581-S B1 1SAP284000R0001

Typical Applications​
The DI581-S is well-suited for applications requiring the acquisition of multiple discrete signals. In a bottling plant, it can be used to monitor 16 sensors on a conveyor line, such as bottle presence detectors, fill-level switches, and cap-torque indicators. The data is transmitted to the AC500 CPU, which controls the line speed and rejects non-conforming products.
In a municipal water treatment facility, the module can interface with 16 pump status contacts and valve position switches across a pumping station. This provides the central SCADA system with real-time status for remote monitoring and control.
In an electrical substation, the DI581-S can monitor the auxiliary contacts of 16 circuit breakers or disconnect switches, relaying their status to the plant’s protection and control system. Its wide operating temperature range makes it suitable for installation in non-climate-controlled enclosures.

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