Schneider Modicon AS-P890-000 Remote I/O Processor Power Supply

The Schneider Modicon AS-P890-000 is a remote I/O processor power supply module for the Modicon Quantum 800 series programmable logic controller platform. This module provides stable 24 V DC power to remote I/O modules, enabling distributed I/O configurations while providing electrical isolation between the master PLC and remote I/O for enhanced system reliability. The AS-P890-000 is designed for use in distributed I/O systems where I/O modules need to be placed at a distance from the main controller, reducing wiring and improving system flexibility. With a wide input voltage range of 90‑264 V AC and a high output efficiency of 96%, this power supply is suitable for industrial environments requiring stable and efficient power delivery.

Technical Specifications

Input voltage range: 90‑264 V AC (universal input). Output voltage: 24 V DC regulated. Output power: 1000 W. Output current capacity: 50 A. Efficiency: 96% (typical). Interfaces: supports multiple industrial communication protocols including Modbus and Ethernet for integration with other devices. Compatibility: compatible with Modicon 800 series I/O and PLC systems. Protection functions: overload protection, short-circuit protection. Operating temperature range: -20°C to +50°C. Protection class: IP20. Dimensions: 100 mm × 40 mm × 70 mm. Certifications: CE, UL. The module is designed for installation in a control cabinet. It provides stable 24 V DC power to remote I/O modules, supporting I/O expansion and signal isolation.

Key Features

• 90-264 V AC universal input for global compatibility

• 24 V DC output at 1000 W (50 A capacity)

• 96% efficiency for reduced energy consumption and heat dissipation

• Remote I/O processor functionality for Modicon 800 series

• Provides electrical isolation between master PLC and remote I/O

• Supports multiple industrial communication protocols (Modbus, Ethernet)

• Wide operating temperature range (-20°C to +50°C)

• Overload and short-circuit protection

• Compact dimensions (100 mm × 40 mm × 70 mm)

Function in Modicon Quantum 800 Systems

The AS-P890-000 serves as a remote I/O adapter and power supply module for the Modicon Quantum 800 series. It provides stable 24 V DC power to remote I/O modules connected to it, enabling distributed I/O configurations where I/O modules can be located farther from the main controller. This reduces cabling costs and improves system flexibility. The module also provides electrical isolation between the master PLC and remote I/O, protecting the main controller from field wiring faults and improving overall system reliability. In distributed I/O systems, the AS-P890-000 can be placed at remote locations, providing local power supply to I/O modules and reducing the need for long power cables.

Integration with Quantum Series

The AS-P890-000 is fully compatible with Modicon Quantum 800 series I/O modules and PLCs. It integrates seamlessly into existing Quantum architectures, allowing engineers to expand I/O capacity without replacing the main controller. The module supports communication protocols including Modbus and Ethernet, ensuring smooth connection with other devices and systems. This improves system interoperability and allows the module to be used in a wide range of industrial automation applications. The user‑friendly programming environment allows easy parameter setting, control logic writing, and system debugging.

Applications

The AS-P890-000 is used in industrial automation applications requiring distributed I/O configurations, such as manufacturing lines (connecting various sensors and actuators on the production line to the central control system), energy sector monitoring and control of power generation and distribution systems, automation control integration of different devices and systems to achieve seamless operation, and harsh environment installations where electromagnetic interference is high. The module is suitable for industries including manufacturing, energy, oil and gas, water treatment, and general automation.

Installation and Wiring

Mount the AS-P890-000 on a DIN rail or panel inside a control cabinet. Connect the AC input (90‑264 V AC) to the line (L) and neutral (N) terminals. Connect the ground terminal (PE) to the cabinet ground. Connect the 24 V DC output to the remote I/O modules’ power supply terminals. Use appropriate wire sizes for the 50 A output capacity. The module supports overcurrent and short-circuit protection; external fuses are not required but may be added for additional protection. Ensure adequate clearance for heat dissipation; the 96% efficiency minimizes heat generation, but proper ventilation is still recommended.

Maintenance and Diagnostics

The AS-P890-000 has LED indicators for power and fault status. If the output voltage is within specification, the green LED illuminates. A red LED indicates a fault condition (overload, short circuit, or over-temperature). The module’s status can be monitored via the communication interface or through the main PLC’s diagnostic system. No routine maintenance is required. Replace the module if the output fails.

Conclusion

The Schneider Modicon AS-P890-000 remote I/O processor power supply module provides reliable, efficient power distribution for Modicon Quantum 800 series distributed I/O systems. Its 96% efficiency, 1000 W capacity, and wide input range make it a suitable choice for industrial automation applications requiring remote I/O expansion.