SCHNEIDER AS-S908-110
Schneider AS-S908-110 is a Remote I/O Processor belonging to the Modicon AS series from Schneider Electric.
This product is primarily used as a remote expansion module for Modicon 1200/1100 series PLCs, offering high reliability and real-time communication capabilities.
Below are the key specifications and features of this product:
Core Technical Specifications
Rated Current:
- 9 A (rated operating current)
Application Environment:
- Mainly used for remote I/O expansion of Modicon 1200/1100 series PLCs
- Suitable for industrial automation systems, especially in applications requiring highly reliable I/O communication
Main Functions and Advantages
Communication Protocol Support:
- Supports the Modbus RTU communication protocol, enabling fast and efficient data exchange with host computers or other PLCs
High Reliability:
- Designed in accordance with Schneider Electric’s high-reliability standards (e.g., 140NOE77110), providing strong resistance to electrical interference in harsh industrial environments
Integration and Compatibility:
- Also referred to as ASS908110 (an alternative designation), it is typically used in combination with other Modicon series I/O modules (such as ASS911801) to achieve flexible I/O configuration and allocation

Main brand :
ABB Allen-Bradley Alstom Bently GE MOOG Schneider
Woodward HIMA Honeywell Emerson Foxboro
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What is a DCS?
A Distributed Control System (DCS) is a sophisticated, computer-based control system designed to automate, monitor, and manage complex industrial processes. It is widely used in large-scale industrial facilities such as refineries, power plants, chemical plants, and paper mills, where precision, reliability, and scalability are critical.
How Does a DCS Work?
A DCS is composed of several interconnected components that work seamlessly to ensure efficient process control. Here’s a breakdown of its key elements:
- Controllers:
These are the “brains” of the system. Controllers receive data from sensors, process it using pre-programmed logic, and send output signals to actuators to maintain optimal process conditions. - Sensors:
Sensors act as the “eyes and ears” of the system, measuring critical physical parameters such as temperature, pressure, flow rate, and level. This real-time data is essential for accurate control. - Actuators:
Actuators are the “muscles” of the system. They execute physical actions based on controller commands, such as opening/closing valves, starting/stopping motors, or adjusting dampers. - Operator Stations:
These serve as the human-machine interface (HMI), allowing operators to monitor the process, adjust setpoints, and troubleshoot issues. Modern DCS systems often feature intuitive graphical interfaces for ease of use. - Communication Network:
The backbone of the DCS, this network connects all components, enabling seamless data exchange and coordination. It ensures that every part of the system works in harmony, even across large industrial sites.
Why is a DCS Important?
- Centralized Control with Distributed Execution: A DCS allows for centralized monitoring while distributing control functions across multiple controllers, reducing the risk of system-wide failures.
- Scalability: It can easily expand to accommodate growing operational needs.
- Reliability: Redundant systems and fail-safes ensure continuous operation, even in critical environments.
- Efficiency: Optimizes processes, reduces waste, and improves overall productivity.














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