Honeywell 2MLR-CPUH/F Redundant CPU Module Fiber Optic Expansion

Product Overview

The Honeywell 2MLR-CPUH/F is a high-performance redundant CPU module for the MasterLogic-200R (ML200R) PLC system with fiber optic (FO) remote I/O expansion. The "H" denotes high-speed processing, while "/F" specifies fiber-optic I/O cable support for long-distance, noise-immune expansion. It provides fully redundant CPU architecture with automatic failover in less than 50 ms, ensuring zero process interruption for critical applications in power generation, oil & gas, and chemical processing.

Key Specifications

• Product Type: Redundant High-Performance CPU Module
• Series: MasterLogic-200R (ML200R)
• Program Memory: 128K steps
• Max I/O Points: 131,072 points
• Processing Speed: 0.1 μs per basic instruction
• Redundancy: Dual CPU with <50 ms switchover
• I/O Expansion: Fiber optic (FO) — supports 2MLR-DBSF expansion driver
• Local I/O Distance: Up to 100 m via UTP CAT5 cable
• Remote I/O Distance: Up to 15 km via fiber optic
• Built-in Ports: USB (programming), RS-232C (diagnostics)
• Programming Standard: IEC 61131-3 (LD, ST, FBD, SFC)
• Web Server: Built-in for remote diagnostics
• Dimensions (W x H x D): 27.4 mm x 90 mm x 70 mm
• Weight: Approx. 200 g
• Operating Temperature: 0°C to +55°C

Features & Benefits

• Fully redundant CPU pair — dual processors run in hot-standby mode; primary CPU failure triggers automatic switchover to standby in under 50 ms with no process disruption
• Fiber optic I/O expansion — supports remote I/O cabinets up to 15 km away via 2MLR-DBSF, completely immune to VFD noise, welding interference, and lightning transients
• 131,072 I/O points — massive I/O capacity supports the largest distributed control architectures without requiring multiple PLCs
• 0.1 μs instruction speed — ultra-fast scan time ensures real-time response for turbine protection, emergency shutdown, and high-speed batch control
• IEC 61131-3 programming — supports all five standard languages, enabling code reuse and global engineering team collaboration
• Built-in web diagnostics — maintenance engineers can view I/O status, force variables, and download trend data via standard web browsers without dedicated HMI software

Typical Applications

• Power plant turbine control and burner management systems (BMS)
• Petrochemical refinery safety instrumented systems (SIS)
• Offshore platform process shutdown and fire & gas systems
• Pharmaceutical batch reactor control with FDA 21 CFR Part 11
• Water treatment plant critical pump and valve control
• Steel mill continuous casting and rolling mill automation

Installation Guide

1. Install CPU pair in redundant main base — mount two 2MLR-CPUH/F modules in the dedicated CPU slots of the 2MLR-M02P or 2MLR-M06P main base.
2. Connect synchronization cable — link the two CPUs with the dedicated redundancy synchronization cable (provided) to ensure real-time data mirroring.
3. Install fiber optic expansion driver — mount 2MLR-DBSF in the expansion driver slot and connect SC-type fiber cables to remote 2MLR-E08P or 2MLR-E12P expansion bases.
4. Apply redundant power — install two 2MLR-AC13 (110V) or 2MLR-AC23 (220V) power supplies for full power redundancy.
5. Configure redundancy in SoftMaster — set the primary/standby roles, I/O scan parameters, and failover behavior in the CPU redundancy settings.
6. Download program — download the application to the primary CPU; the standby CPU automatically synchronizes and mirrors the program.
7. Test failover — simulate primary CPU failure by removing it from the rack and confirm the standby assumes control within 50 ms without process upset.

FAQ

Q: What is the difference between 2MLR-CPUH/F and 2MLR-CPUH/T?
A: The 2MLR-CPUH/F supports fiber optic (FO) remote I/O expansion via 2MLR-DBSF. The 2MLR-CPUH/T supports twisted pair (UTP) remote I/O expansion via 2MLR-DBST. Both are redundant high-performance CPUs. Choose /F for long-distance or high-EMI environments; choose /T for short-distance copper runs.

Q: What is the difference between 2MLR-CPUH/F and 2MLI-CPUU?
A: The 2MLR-CPUH/F is a redundant CPU for ML200R systems with dual CPUs and redundant power. The 2MLI-CPUU is a non-redundant enhanced CPU for standard ML200 systems. They are not interchangeable.

Q: Can I use UTP and fiber in the same system?
A: Yes. The ML200R architecture supports mixed media — local I/O bases connect via UTP CAT5 (up to 100 m), while remote bases connect via fiber (up to 15 km) in the same I/O network.

Q: What is the maximum number of expansion bases?
A: The 2MLR-CPUH/F supports up to 12 local I/O bases and 12 remote I/O bases per system, for a total of 24 bases and 131,072 I/O points.

Q: Does this CPU support peer-to-peer communication?
A: Yes. Install the 2MLL-EFMT (Fast Ethernet) module on the CPU base for peer-to-peer communication between ML200R controllers via dedicated Fast Ethernet.

Selection Tips

• Select 2MLR-CPUH/F when you need CPU redundancy and fiber optic remote I/O for long-distance or high-EMI applications.
• For twisted pair (copper) remote I/O, choose 2MLR-CPUH/T instead.
• Always pair with two identical power supplies (2MLR-AC13 for 110V or 2MLR-AC23 for 220V) to achieve full power redundancy.
• Verify your SoftMaster version supports ML200R redundancy configuration before commissioning.
• Order spare fiber patch cords (SC-SC, multimode) for maintenance and troubleshooting.