Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 2MLR-CPUH/T |
| Manufacturer | Honeywell |
| Product Family | MasterLogic-200R |
| Module Type | Redundant PLC CPU |
| Processor | NGP1000 |
| Program Memory | 7 MB |
| Built-in Flash Memory | 16 MB |
| Data Memory | 2 MB |
| Total Memory | 25 MB |
| Programming Languages | Ladder Diagram, Sequential Function Chart, Structured Text, Instruction List (view only) |
| Basic LD Instruction Speed | 0.042 μs/step |
| Basic MOV Instruction Speed | 0.112 μs/step |
| Maximum I/O Bases | 31 |
| Maximum I/O Slots | 372 |
| Maximum Base I/O | 23,808 points |
| Maximum Network / Remote I/O | 128,000 points |
| I/O Network Medium | Twisted pair / CAT5 |
| Maximum I/O Extension Distance | 100 m over UTP |
| Built-in Programming Interfaces | RS-232C and USB |
| Current Consumption | 1,173 mA |
| Module Weight | Approximately 0.257 kg |
| Operating Temperature | 0–55°C |
| Storage Temperature | -25–70°C |
| Operating Humidity | 5–95% RH, non-condensing |
Specifications are based primarily on Honeywell’s MasterLogic-200 technical documentation. The 100 m UTP distance applies to the documented I/O network configuration, not every communication connection.
Product Introduction
Honeywell 2MLR-CPUH/T MasterLogic-200R Redundant CPU
The Honeywell 2MLR-CPUH/T is a high-speed central processing unit for the MasterLogic-200R programmable logic controller platform. It executes industrial control programs and supports redundant CPU configurations for applications requiring controller availability. Its memory architecture includes 7 MB of program memory, 16 MB of built-in flash, and 2 MB of data memory.
2MLR-CPUHT
The /T version is designed for twisted-pair CAT5 I/O network connectivity, distinguishing it from the fiber-optic 2MLR-CPUH/F. The controller supports distributed I/O expansion, multiple IEC programming languages, and integration with Honeywell control-system environments.
Application Scenarios & Field Pitfalls
The 2MLR-CPUH/T is intended for PLC installations where control execution and I/O availability are important to plant operation. In redundant configurations, the primary and standby controller arrangement helps maintain control continuity during a CPU fault. However, installing a replacement processor without matching the redundancy configuration, synchronization setup, and application project can prevent the system from returning to its intended operating state.
Typical application scenarios
- Process automation: Executes control sequences, interlocks, and equipment logic in industrial process installations.
- Redundant PLC architecture: Operates as part of a MasterLogic-200R primary/standby CPU configuration.
- Distributed I/O control: Manages local and remote I/O bases over the supported CAT5 network architecture.
- Batch and sequence control: Executes programmed logic for equipment sequencing and coordinated process operations.
- Experion integration: Supports compatible Honeywell control-system integration for PLC alarms, events, and clock synchronization.
Engineering checks before replacement
- Distinguish /T from /F. The 2MLR-CPUH/T uses the twisted-pair/CAT5 I/O network variant, while 2MLR-CPUH/F is the fiber-optic version. They should not be substituted without checking the installed communication hardware and network design.
- Verify the redundancy arrangement. Confirm whether the installation uses a master and standby CPU, the synchronization connection, and the required I/O ring topology. A single replacement CPU does not automatically restore the complete redundant architecture.
- Check the application project. Confirm program version, firmware compatibility, retained data, system parameters, and backup availability before commissioning.
- Inspect the CAT5 I/O network. Check cable category, connectors, routing, link status, and the 100 m documented UTP distance limit for the applicable network segment.
- Verify the CPU base and power hardware. The MasterLogic-200R uses dedicated base and power modules. Confirm the installed main base and power supply model rather than assuming compatibility with non-redundant ML200 hardware.
- Validate standby synchronization and switchover. Honeywell’s documentation lists a 22 ms switchover time under its specified redundant operating conditions. Actual behavior should be tested against the installed system configuration and process requirements.
Related Products
- 2MLR-CPUH/F: Fiber-optic version of the MasterLogic-200R redundant CPU. It is the closest functional counterpart, but its network medium differs from the /T model.
- 2MLI-CPUU: Non-redundant MasterLogic-200 CPU. It has a different redundancy architecture and lower documented I/O capacity; it is not a direct substitute for 2MLR-CPUH/T.
- 2MLI-CPUH: Non-redundant MasterLogic-200 CPU variant. Check its memory, base architecture, and application compatibility before considering a system conversion.
- 2MLI-CPUS: Another non-redundant MasterLogic-200 CPU configuration. It belongs to the ML200 family but does not provide the same redundant architecture.
- 2MLR-M06P: Main CPU base designed for the 2MLR-CPUH/T and 2MLR-CPUH/F modules, with six module installation positions.
- 2MLR-E12P: Expansion I/O base for the MasterLogic-200R platform, supporting up to 12 modules.
- 2MLR-DBST: Twisted-pair/CAT5 I/O interface module used in the MasterLogic-200R architecture. Verify the specific base and network topology before replacement.
- 2MLR-DBSF: Fiber-optic I/O interface module for the corresponding fiber-based network configuration. It serves a different communication medium from DBST.
- 2MLR-AC23: 220 VAC power module rated at 8.5 A for the MasterLogic-200R system. It is a power component, not a CPU replacement.
Procurement note: Specify Honeywell 2MLR-CPUH/T (2MLR-CPUHT) and confirm the /T suffix on the physical label. Request the hardware revision, firmware information, module photographs, and functional test evidence. For an operating redundant PLC, also verify the standby CPU, synchronization arrangement, I/O network, and application backup before approving installation.
