2025-08-15 BY
IN Company News

Product Overview

The DSIH900 is a high-performance industrial safety controller designed to provide reliable protection and interlock control in critical manufacturing and process environments. As a core component in safety instrumented systems (SIS), the DSIH900 monitors hazardous conditions and triggers protective actions to prevent accidents, ensuring the safety of personnel, equipment, and the environment. With a focus on compliance and fault tolerance, the DSIH900 meets international safety standards such as IEC 61508 (SIL 3) and IEC 61511, making it suitable for high-risk industries including petrochemical, pharmaceutical, and power generation. Whether deployed in boiler protection systems, emergency shutdown (ESD) loops, or machinery guarding applications, the DSIH900 stands out for its redundant architecture, fast response time, and seamless integration with existing control systems.

Technical Specifications

Parameter
Value
Product Model
DSIH900
Manufacturer
ABB
Product Type
Safety Controller
Safety Integrity Level
SIL 3 (per IEC 61508)
Input/Output Capacity
32 safety inputs, 16 safety outputs (expandable to 128 I/O)
Response Time
< 100 ms
Operating Temperature
-20°C to 60°C (-4°F to 140°F)
Power Supply
Dual redundant 24 VDC (18-32 VDC)
Communication Protocols
Modbus TCP/IP, Profibus DP, Ethernet/IP
MTBF
> 1,000,000 hours

Key Features and Benefits

The DSIH900 is engineered to deliver uncompromising safety performance, starting with its redundant hardware architecture. Equipped with dual processors, power supplies, and communication modules, it eliminates single points of failure—ensuring continuous operation even if a component fails. This redundancy is critical for safety systems where downtime could lead to catastrophic events, providing the highest level of fault tolerance required for SIL 3 applications.
Speed and accuracy are defining traits of the DSIH900. Its fast response time (<100 ms) ensures that hazardous conditions are detected and addressed before they escalate, whether shutting down a chemical reactor or stopping a high-speed production line. The controller’s advanced diagnostics continuously monitor input signals and internal components, providing real-time alerts for faults such as wire breaks, short circuits, or module failures. This proactive monitoring minimizes the risk of undetected issues and simplifies maintenance, reducing the likelihood of unsafe conditions.
Compliance is built into every aspect of the DSIH900’s design. It meets global safety standards, including IEC 61508 (SIL 3) and IEC 61511, as well as industry-specific regulations for hazardous areas (ATEX, Class I Div 2). This ensures seamless integration into safety systems worldwide, eliminating barriers to deployment in multinational facilities. The controller also supports safety lifecycle management, with features like electronic signature tracking and audit trails to simplify documentation for regulatory inspections.
Integration flexibility is another key advantage of the DSIH900. It communicates with mainstream industrial protocols (Modbus TCP/IP, Profibus DP, Ethernet/IP), enabling easy connectivity to DCS systems, HMI panels, and SCADA software. This interoperability allows safety data to be shared across the organization, enhancing visibility into safety system performance while avoiding the need for proprietary software. The controller’s modular design also supports I/O expansion, allowing it to scale from small machinery guarding applications to large-scale plant-wide safety networks.
User-friendly operation simplifies the DSIH900’s configuration and maintenance. Its intuitive programming software uses function block diagrams (FBD) and ladder logic, familiar to most control engineers, reducing training time. The software includes built-in safety libraries for common functions like emergency stops, two-hand control, and permissive interlocks, accelerating system development. Additionally, the controller supports online configuration changes without interrupting operation, enabling updates to safety logic during scheduled maintenance windows without compromising system integrity.
Backed by a one-year warranty and expert pre-sales support to ensure alignment with safety requirements, the DSIH900 offers a reliable, future-proof solution for protecting critical industrial processes.

Related Models

  • DSIH800 – SIL 2-rated variant of the DSIH900 with simplified redundancy, suitable for medium-risk applications requiring lower safety integrity levels.
  • DSIH900-EX – Explosion-proof model certified for hazardous areas (ATEX Zone 2, Class I Div 1), designed for direct installation in explosive environments, compatible with the DSIH900.
  • DSIH900-CC – Compact version with reduced I/O capacity (16 inputs/8 outputs), ideal for small machinery safety systems, works alongside the DSIH900 in distributed setups.
  • DSIH950 – Advanced model with enhanced processing power and support for OPC UA, serving as an upgraded alternative to the DSIH900 for smart factory integration.
  • DSIH900-LTE – Variant with cellular communication for remote monitoring, enabling safety system diagnostics in off-grid locations, compatible with the DSIH900.
  • DSIH700 – Entry-level SIL 1 controller, a cost-effective companion to the DSIH900 for non-critical safety functions in mixed-risk environments.
  • DSIH900-RT – Real-time variant with deterministic response (<50 ms), tailored for high-speed applications like robotics and automated assembly lines, building on the DSIH900’s performance.
As a trusted distributor, we provide expert pre-sales consultation to ensure the DSIH900 meets your safety system requirements, including SIL verification and protocol compatibility checks. Our after-sales support includes installation assistance, programming guidance, and troubleshooting services. All products, including the DSIH900, come with a one-year warranty. If you need a specific model not listed, contact us via [WhatsApp](https://wa.me/+86 19389860630) or email at jllucky33@qq.com for personalized assistance.