Schneider Electric 140CRA21220 DIO Drop Interface Module

Product Description

The 140CRA21220 DIO Drop Interface is part of the Modicon Quantum automation platform, designed to provide a reliable communication and power interface between the Quantum backplane and remote I/O drops. It is optimized for systems requiring redundancy at the communication level and stable 24 VDC power input architecture.

This module supports dual redundant ports, enabling improved communication availability and fault-tolerant system design in critical control environments. It integrates diagnostic functions and protected power conversion to maintain operational stability in continuous-duty applications.

Key Technical Specifications

• Product Series: Modicon Quantum
• Device Type: DIO Drop Interface Module
• Model / Part Number: 140CRA21220
• Input Voltage: 24 VDC
• Operating Voltage Range: 20 – 30 VDC
• Max Input Current: 1.6 A @ 24 VDC
• Inrush Current: 30 A @ 24 VDC
• Buffer Time: 1 ms
• Output Voltage: 5.1 VDC regulated backplane supply
• Output Current: 3 A nominal
• Power Dissipation: 11 W
• I/O Capacity: 30 input words / 32 output words
• Communication Ports: 2 redundant drop interface ports
• Backplane Compatibility: 2, 3, 4, 6, 10, 16-slot Quantum racks
• Terminal Connection: 7-position terminal block
• Protection Features: Short-circuit protection, overvoltage protection
• Diagnostics: RAM checksum, RAM address monitoring, runtime and startup diagnostics
• Operating Temperature: 0 to 60 °C
• Storage Temperature: -40 to 85 °C
• Humidity: 95% non-condensing
• Altitude Rating: Up to 5000 m
• Certifications: UL, CSA Class I Division 2, DNV, GOST, C-Tick
• Standards: UL 508

Functional Overview

• Provides interface between Quantum rack backplane and distributed I/O drops
• Supports dual redundant communication ports for higher system availability
• Converts 24 VDC input into regulated 5.1 VDC backplane supply
• Includes embedded diagnostics for system monitoring and fault detection
• Designed for continuous industrial operation in harsh environments

Applications

• Process automation systems requiring high availability
• Distributed control system (DCS) architectures
• Critical infrastructure control systems
• Energy and utility automation networks
• Remote I/O expansion for Modicon Quantum platforms

Compatibility Notes

The 140CRA21220 is designed exclusively for the Modicon Quantum platform. It is not compatible with Modicon Premium or M340 systems due to differences in backplane communication and power architecture.

FAQ

Q1: What is the main difference between this and single-port variants? This model includes dual redundant ports, improving communication reliability and fault tolerance.

Q2: What type of power supply is required? It operates on a 24 VDC supply with a permissible range of 20–30 VDC.

Q3: Is this module suitable for safety-critical environments? Yes, it includes redundancy support, diagnostic functions, and certifications for industrial safety applications.