Honeywell 2MLI-CPUS Redundant Power PLC Processor

2MLI-CPUS Honeywell MasterLogic-200 IEC Standard Central Processing Unit

The 2MLI-CPUS is a standard IEC-compliant central processing unit for Honeywell's MasterLogic-200 programmable logic controller series. This CPU module features integrated redundant power supply support for enhanced system reliability. It is designed for applications requiring IEC standard programming and dependable operation in industrial environments.

Core Specifications and Identification

• Manufacturer and Model: This is a Honeywell product from the MasterLogic-200 series.
• Part Number: The specific catalog number is 2MLI-CPUS.
• Product Type: Functions as the IEC standard CPU Central Processing Unit module.
• Key Feature: Supports redundant power supply configuration for fault tolerance.

Capacity and Performance Specifications

• Maximum I/O Capacity: Supports up to 768 I/O points total.
• Program Memory: Provides 640 KB of program memory for application logic.
• Data Memory: Includes 256 KB of data memory for variables and parameters.
• Retentive Memory: 32 KB of battery-backed memory for critical data retention.
• Scan Time: Typical scan time of 0.5 milliseconds per 1K logic instructions.
• High-Speed Counter: Supports 2 independent high-speed counters up to 50 kHz.

Power and Redundancy Features

• Power Supply Input: Accepts DC 24V with a range of 20.4V to 28.8V.
• Redundant Power: Supports dual power supply inputs for redundant operation.
• Power Switching: Automatic switchover in ≤ 5 milliseconds during power failure.
• Current Consumption: Typically 200 mA at 24V DC.
• Battery Backup: Includes built-in lithium battery for memory retention.
• Battery Life: Approximately 3 years under normal operating conditions.

Communication and Network Capabilities

• Built-in Ports: Features 1x RS-232C and 1x RS-485 communication port.
• Communication Speed: Supports baud rates up to 115.2 kbps.
• Network Protocols: Standard support for Modbus RTU and Modbus ASCII protocols.
• Expansion Capability: Can connect to up to 3 local expansion I/O modules.
• Network Options: Compatible with optional Ethernet and Profibus-DP communication modules.

Programming and Standards Compliance

• Programming Standard: Fully compliant with IEC 61131-3 international standard.
• Supported Languages: Ladder Diagram (LD), Function Block Diagram (FBD), and Structured Text (ST).
• Online Functions: Supports online monitoring, debugging, and program modification.
• Real-Time Clock: Built-in clock with ±3 minutes per month accuracy.
• Task Management: Supports up to 8 cyclic tasks with configurable priorities.

Environmental Specifications

• Operating Temperature: Functions from 0°C to 55°C.
• Storage Temperature: Can be stored from -20°C to +70°C.
• Operating Humidity: 10% to 90% RH, no condensation.
• Altitude Rating: Suitable for installation below 2000 meters above sea level.
• Vibration Resistance: 10 to 57 Hz with 0.075 mm amplitude.
• Shock Resistance: 10G for 11 ms duration.

Physical and Installation Specifications

• Module Dimensions: 90 mm (H) x 60 mm (W) x 70 mm (D).
• Mounting: Standard DIN rail mounting (35 mm).
• Weight: Approximately 350 grams.
• LED Indicators: 6 status LEDs for power, run, error, communication, and battery status.

Certifications and Standards

• Safety Standards: Complies with UL 508, CSA 22.2 No. 142, and EN 61131-2.
• EMC Standards: Meets IEC 61000-6-2 and IEC 61000-6-4 requirements.
• Environmental Compliance: RoHS and REACH compliant.

Packaging and Shipping

• Package Contents: Includes the 2MLI-CPUS CPU module, installation guide, and warranty documentation.
• Shipping Methods: Available for international delivery via FedEx, UPS, and DHL services.

Frequently Asked Questions FAQ

• What is the significance of IEC compliance? The 2MLI-CPUS follows IEC 61131-3 standards, ensuring programming language consistency and portability across different PLC platforms from various manufacturers.
• How does redundant power supply work? The CPU accepts power from two independent 24V DC sources; if one fails, it automatically switches to the other within milliseconds without interrupting operation.
• What types of applications is this CPU suitable for? Ideal for small to medium automation projects, machine control, and processes where IEC standard programming and power supply reliability are important.
• Can it be used in safety-critical applications? This is a standard control CPU; for safety applications, refer to Honeywell's safety-rated PLC products specifically designed for SIL-rated functions.

The 2MLI-CPUS provides a balanced combination of IEC standard compliance, adequate processing power, and enhanced reliability through redundant power support. Its moderate I/O capacity and programming flexibility make it suitable for a wide range of industrial automation applications. This Honeywell CPU delivers dependable performance for systems where power continuity and programming standards are critical considerations.

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