Honeywell 2MLR-CPUH/T MasterLogic-200R Redundant CPU, 7MB Program Memory, Twisted-Pair Network

Product Overview

The Honeywell 2MLR-CPUH/T is a high-speed redundant CPU module for the MasterLogic-200R PLC platform. Featuring 7 MB of program memory, 16 MB of Flash memory, and a 0.042 µs per step LD instruction execution speed, this processor delivers exceptional control performance for demanding industrial automation applications. The /T suffix designates twisted-pair (UTP) network redundancy, enabling CPU hot-standby failover with switchover times under 50 ms.

Key Specifications

• Processor: High-speed 32-bit microprocessor
• Program Memory: 7 MB
• Data Memory: 2 MB
• Flash Memory: 16 MB (for program and data backup)
• Instruction Execution Speed: 0.042 µs per step (LD typical)
• Max Local I/O Points: 23,808 points
• Max Network/Remote I/O Points: 128,000 points
• Max I/O Bases: 31
• Max Slots: 372
• Operator Count: 18
• Redundancy: CPU hot-standby redundancy (switchover < 50 ms)
• I/O Network: Twisted-pair (UTP) redundant I/O network
• Remote I/O Distance: Up to 100 m via UTP CAT5 cable
• Communication Ports: USB (12 Mbps), RS-232C (Modbus RTU), Ethernet (10/100 Mbps)
• Supported Protocols: TCP/IP, UDP, Modbus TCP/IP, HNet
• Programming Languages: Ladder Diagram (LD), Sequential Function Chart (SFC), Structured Text (ST), Instruction List (IL, view only)
• Current Consumption: 1173 mA
• Dimensions (W × H × D): 27 × 98 × 90 mm
• Weight: 0.257 kg
• Operating Temperature: 0°C to +55°C

Features & Benefits

1. Sub-50 ms Failover: Hot-standby CPU redundancy ensures continuous operation with automatic switchover in under 50 milliseconds.
2. Ultra-Fast Processing: 0.042 µs per step LD execution handles complex logic, high-speed counting, and advanced PID loops without scan-time degradation.
3. Massive I/O Capacity: Supports up to 128,000 network I/O points and 372 slots across 31 bases for large-scale distributed control.
4. Multi-Protocol Ethernet: Built-in 10/100 Mbps Ethernet supports Modbus TCP/IP and HNet for seamless integration with SCADA, DCS, and MES systems.
5. IEC 61131-3 Compliant: Program in Ladder Diagram, Sequential Function Chart, or Structured Text using Honeywell SoftMaster programming software.
6. Non-Volatile Backup: 16 MB Flash memory retains program and data during power loss, eliminating restart delays.

FAQ

Q: What is the difference between 2MLR-CPUH/T and 2MLR-CPUH/F?
A: The 2MLR-CPUH/T uses twisted-pair (UTP CAT5) for the redundant I/O network, while the 2MLR-CPUH/F uses fiber optic for the redundant I/O network. Select /T for short-distance copper cabling and /F for long-distance or electrically noisy environments.

Q: What programming software is required?
A: The 2MLR-CPUH/T is programmed using Honeywell SoftMaster software, which supports all IEC 61131-3 languages.

Q: How many expansion bases can this CPU support?
A: The CPU supports up to 31 I/O bases total, including the main CPU base and all remote expansion bases.

Q: Is the USB port used for programming?
A: Yes, the front-panel USB port (12 Mbps) allows direct programming, firmware updates, and online monitoring without requiring an Ethernet connection.

Installation Guide

• Install the CPU module into the designated CPU slot (slot 0) of the 2MLR-M02P or 2MLR-M06P main base.
• Connect the Ethernet port to your plant network switch using a shielded Cat5e or higher cable for programming and HMI communication.
• For redundant configurations, install a second 2MLR-CPUH/T in the partner main base and connect the sync cable between the two CPUs.
• Connect UTP CAT5 cables from the CPU's I/O network ports to the expansion driver modules (2MLR-DBST) for remote I/O bases.
• Configure IP addresses and redundancy parameters via SoftMaster software before downloading the control program.
• Verify CPU status via the front-panel LEDs (RUN, ERR, redundancy status) before bringing the process online.

Selection Tips

• Network Medium: Choose 2MLR-CPUH/T for twisted-pair (copper) I/O networks up to 100 m. For fiber-optic networks up to 2 km, select 2MLR-CPUH/F.
• Memory Requirements: With 7 MB program memory and 2 MB data memory, this CPU handles large, complex control strategies. For smaller applications, consider the 2MLI-CPUH-CC (512 KB program memory, 6,144 I/O points).
• Redundancy Scope: To achieve full redundancy, pair the CPU with redundant power supplies (2MLR-AC12/AC22), redundant expansion bases (2MLR-E12H), and dual expansion drivers (2MLR-DBDT).
• I/O Density: Calculate total required digital, analog, and communication modules across all planned bases to ensure the 372-slot limit is not exceeded.