Schneider Electric 140CRA21120 DIO Drop Interface

The Schneider Electric 140CRA21120 provides robust distributed I/O connectivity for Modicon Quantum systems. This dual-port interface module enables flexible system expansion with redundant communication capabilities.

Core Technical Specifications

• Brand: Schneider Electric
• Model: 140CRA21120
• Platform: Modicon Quantum Automation System
• Product Type: Distributed I/O Drop Interface
• Communication Ports: 2 redundant single ports
• Supply Voltage: 24 V DC nominal (20-30 V range)
• Supply Current: 1.6 A maximum at 24 V
• Inrush Current: 30 A peak at 24 V
• Output Voltage: 5.1 V regulated
• Output Current: 3 A nominal capacity
• I/O Capacity: 30 input words / 32 output words
• Power Buffer: 1 ms maximum hold-up time
• Fuse Rating: 2.5 A recommended
• Data Rate: Up to 1.5 Mbps per port
• Isolation Voltage: 1500 V RMS port-to-port

Protection & Safety Features

• Comprehensive short-circuit protection on all outputs
• Advanced overvoltage protection circuitry
• 4 kV contact electrostatic discharge immunity
• 8 kV air gap ESD protection
• Electromagnetic field resistance 9.1 V/m (80-2000 MHz)
• Zero minimum load current requirement
• Thermal overload protection with auto-recovery

Environmental & Compliance

• Operating Temperature: 0°C to +60°C (32°F to 140°F)
• Storage Temperature: -40°C to +85°C (-40°F to 185°F)
• Operating Humidity: 95% maximum non-condensing
• Operating Altitude: 5000 meters maximum (16404 feet)
• Vibration Resistance: 5-150 Hz, 1G amplitude
• Shock Resistance: 15G for 11 ms duration
• Certifications: UL 508, GOST, C-tick, DNV, CSA Class 1 Division 2

System Integration & Compatibility

• Supports multiple backplane sizes: 2, 3, 4, 6, 10, 16 positions
• 7-pole terminal block for secure connections
• Standard module format for easy installation
• Continuous diagnostics with checksum verification
• RAM address monitoring during operation
• Startup self-test routine for reliability
• Power dissipation: 11 W maximum

Packaging & Delivery Information

• Package Content: Single interface module
• Package Dimensions: 12.20" × 6.50" × 1.97"
• Shipping Weight: 23.8 oz (674 grams)
• Carrier Options: FedEx, UPS, DHL express services
• Warranty Coverage: 12 months comprehensive protection
• Lead Time: Typically ships within 24-48 hours

Technical FAQ

• What is the purpose of the redundant communication ports?
• The dual ports provide communication backup that automatically switches if the primary link fails, ensuring continuous data exchange.
• How many I/O points can this interface module support?
• The 140CRA21120 can handle up to 30 input words and 32 output words, translating to several hundred individual I/O points.
• What diagnostic capabilities does this interface provide?
• It performs continuous checksum verification, RAM testing, and address monitoring to detect communication errors immediately.
• Can this module operate in hazardous locations?
• Yes, the CSA Class 1 Division 2 certification allows installation in potentially explosive industrial environments.
• What is the significance of the 1ms buffer time?
• This brief power hold-up allows the system to maintain operation during momentary voltage dips or quick power source switching.

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