Xiamen Xingruijia Import and Export Co., Ltd. has been specializing in the sales of industrial control equipment spare parts for 20 years. For more ABB models, please refer to the product list . If you need other brands or models, please contact us. We have a variety of brands and models in stock, and we can purchase difficult to order models for you. We look forward to your inquiry!!!

First hand source//affordable price//Spot inventory!

•Shipping Port: Xiamen

•E-mail: sales7@saulplc.com

•Tel/WhatsApp/Wechat: + 86-15359273796

•Ship to you via Fedex/DHL/TNT/UPS/EMS

•Package: Original packing with cartons

ABB  DI581-S B1  1SAP284000R0001

The ABB DI581-S B1 (1SAP284000R0001) is a safety digital input module from the ABB AC500-S Safety PLC / S500-S I/O module family. It is designed for safety-critical automation applications requiring reliable acquisition of digital signals from field devices such as emergency stops, safety switches, light curtains, and other protective devices.  

The module provides 16 safety digital input channels, supports SIL2 and SIL3 safety applications, and is typically used together with ABB AC500-S safety controllers and PROFIsafe-based safety systems. 

Product Parameters

Core Function

The ABB DI581-S performs safety-related digital signal acquisition by monitoring external safety devices and transmitting secure input information to the safety PLC.

Main functions include:

• Collecting ON/OFF signals from safety sensors and switches
• Monitoring emergency stop circuits and protective equipment
• Performing discrepancy time monitoring for dual-channel safety signals
• Providing test pulse outputs for fault detection
• Supporting safety communication through PROFIsafe
• Enabling integration into SIL-rated automation architectures  

Design Features

Safety-Rated Architecture

The DI581-S is designed for functional safety applications with certified safety functions, supporting SIL2 and SIL3 requirements depending on channel configuration.  

The module provides:

• Channel-level status indication LEDs
• Error diagnostics
• Input signal monitoring
• Test pulse evaluation for detecting wiring faults  

Flexible Input Configuration

The module supports:

• 16 single-channel safety inputs
• 8 channels for higher SIL3 safety configurations
• Adjustable input filtering parameters  

Compact Modular Design

The DI581-S uses ABB S500-S modular I/O architecture, allowing easy expansion and maintenance within AC500-S safety PLC systems.  

Hardware Composition

The DI581-S module mainly consists of:

• Safety input processing circuit
• Dual-channel safety monitoring electronics
• 24 VDC power supply interface
• Digital input channels
• Test pulse output channels
• LED diagnostic indicators
• Rotary switches for safety address configuration
• I/O bus interface to ABB controller system

The module is installed together with the TU582-S terminal unit, which provides field wiring connection.  

Application Scenarios

The ABB DI581-S is commonly applied in:

Industrial Machinery Safety

• Emergency stop monitoring
• Safety door switches
• Two-hand control systems
• Machine guarding systems

Process Automation

• Safety interlock systems
• Critical equipment monitoring
• Shutdown protection circuits

Manufacturing Systems

• Robotics safety zones
• Assembly line protection
• Automated production equipment

Energy and Infrastructure

• Safety control panels
• Distributed safety I/O systems
• Critical automation systems

Maintenance Points

• Verify 24 VDC power supply stability before operation.
• Check terminal connections and wiring integrity regularly.
• Monitor diagnostic LEDs for channel faults.
• Confirm safety configuration after replacement.
• Ensure compatibility with ABB AC500-S firmware and safety configuration tools.
• Replace terminal units and modules according to ABB installation requirements.

Comprehensive Evaluation

The ABB DI581-S B1 1SAP284000R0001 is a high-reliability safety input module designed for ABB’s AC500-S safety automation platform. With 16 safety digital inputs, SIL2/SIL3 capability, PROFIsafe support, and integrated diagnostic functions, it provides a robust solution for machine safety and industrial protection applications.