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The Honeywell 2MLC-F201 MasterLogic-200 Sync Cable is a multimode fiber optic synchronization cable used in redundant MasterLogic-200R programmable logic controller (PLC) systems. It connects the two CPU modules in a redundant controller arrangement, supporting synchronization between the active control system and its standby counterpart.
In a redundant PLC installation, two CPU systems are configured so that one controls the process while the other remains available to take over if the active system encounters a failure. The synchronization connection is essential to this arrangement because the two systems must coordinate their operating roles and support the intended redundancy behavior.
The 2MLC-F201 uses multimode fiber optic cable with LC connectors and has a specified cable length of 2 meters. The optical connection is suited to the designated MasterLogic-200R synchronization arrangement, where the two CPU modules are connected through the dedicated fiber link.
For example, a process control system may use redundant PLC hardware to supervise pumps, valves, and other equipment whose operation should continue through a controller fault. The 2MLC-F201 provides the synchronization connection between the redundant CPU modules, while the CPUs, power supplies, communication modules, and PLC application implement the broader redundancy scheme.
This cable is different from the 2MLC-E-series expansion I/O cables. The E-series cables connect expansion bases in a supported non-redundant configuration, whereas the 2MLC-F201 is identified as a synchronization cable for the redundant ML200R system.
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model / Part Number | 2MLC-F201 |
| Product Family | MasterLogic-200R |
| Product Type | Sync Cable |
| Cable Technology | Multimode Fiber Optic Cable |
| Connector Type | LC |
| Cable Length | 2.0 meters |
| Fiber Core / Cladding Diameter | 50/125 μm |
| Bandwidth | 2000 MHz·km at 850 nm |
| Attenuation | ≤ 3.0 dB/km at 850 nm |
| Numerical Aperture | 0.20 ± 0.015 |
| Compatible System | MasterLogic-200R redundant PLC |
| Maximum Optical Link Distance | 2 km, subject to the applicable system requirements |
| Shipping Weight | 3 kg |
The 2MLC-F201 carries optical signals between the two CPU modules in a supported MasterLogic-200R redundant configuration. The fiber link provides the physical communication path required by the synchronization arrangement.
A simplified system arrangement is:
Active CPU ↔ 2MLC-F201 Fiber Optic Sync Cable ↔ Standby CPU
The redundant system uses two CPU assemblies with their associated power and communication hardware. One CPU operates as the active controller, while the other serves as the standby system. If the active controller fails, the system’s redundancy logic manages the transition to the standby CPU according to the configured operating conditions.
The synchronization cable supports this arrangement by connecting the designated CPU interfaces through a multimode optical link. The cable itself does not decide when a switchover occurs or independently maintain process control; those functions depend on the redundant CPUs, system configuration, and supported control logic.
The fiber connection must be installed between the correct interfaces. An expansion cable or an ordinary Ethernet cable is not a substitute for this dedicated synchronization cable, because the physical interface and intended system function differ.
During commissioning, engineers should confirm the correct redundant CPU arrangement, inspect the LC connectors, and verify that the controller reports the expected synchronization status. A correctly connected cable is one part of the redundancy system, not a replacement for the required CPU configuration and system checks.
The 2MLC-F201 forms the optical synchronization link between the two CPU modules in the redundant PLC arrangement. It works with the redundant CPUs and their associated hardware to support the intended active/standby control structure.
Active CPU ↔ Fiber Optic Synchronization Link ↔ Standby CPU
| System Component | Function |
|---|---|
| Honeywell 2MLC-F201 | Provides the multimode fiber optic synchronization connection |
| 2MLR-CPUH/T | Redundant CPU option using the TP communication configuration |
| 2MLR-CPUH/F | Redundant CPU option using the fiber optic communication configuration |
| Main CPU Bases | House the redundant CPUs and associated modules |
| Redundant Power Supplies | Supply the corresponding redundant controller assemblies |
| Communication Modules | Support the system’s configured communication interfaces |
| Active CPU | Executes the active control application |
| Standby CPU | Provides the backup control role within the configured redundancy scheme |
| PLC Application | Defines process control behavior and supported redundancy operation |
| Engineering and Diagnostic Tools | Support configuration, commissioning, and fault investigation |
| Application | Typical Use |
|---|---|
| Power Generation | Connecting redundant PLC CPUs used in plant control systems |
| Water and Wastewater Treatment | Supporting redundant control arrangements for critical pumping and treatment processes |
| Oil and Gas Facilities | Connecting redundant controllers used in process supervision |
| Petrochemical Plants | Supporting controller synchronization in critical automation systems |
| Industrial Utilities | Connecting redundant PLC hardware for essential plant services |
| Continuous Manufacturing | Supporting redundant control arrangements where controller availability is important |
| Process Skids | Connecting redundant CPU assemblies in packaged process equipment |
| Large Pumping Stations | Supporting redundant controller architectures for pump operation |
| Chemical Processing | Connecting the synchronization interfaces of a compatible redundant PLC system |
| Critical Infrastructure Automation | Supporting the physical synchronization link within a configured redundant control system |
| Component | Function |
|---|---|
| Honeywell 2MLR-CPUH/T | Redundant CPU with TP communication configuration |
| Honeywell 2MLR-CPUH/F | Redundant CPU with fiber optic communication configuration |
| Honeywell 2MLR-M02P | Main base for supported redundant CPU installations |
| Honeywell 2MLR-M06P | Main base for supported redundant CPU installations |
| Honeywell 2MLR-AC12 / 2MLR-AC22 | Redundant power supply options |
| Honeywell 2MLR-AC13 / 2MLR-AC23 | Higher-current redundant AC power supply options |
| Honeywell 2MLR-DC42 | Redundant DC power supply option |
| Honeywell 2MLC-F201 | Multimode fiber optic synchronization cable |
| Honeywell 2MLR-DBSF | Fiber optic expansion driver for supported redundant configurations |
| Honeywell 2MLR-DBDF | Fiber optic redundant expansion driver for supported configurations |
| Model | Product Type | Main Difference |
|---|---|---|
| Honeywell 2MLC-F201 | MasterLogic-200R Sync Cable | Multimode fiber optic cable with LC connectors, 2.0 m |
| Honeywell 2MLC-F301 | MasterLogic-200R Fiber Optic Cable | Multimode fiber optic cable, 3.0 m |
| Honeywell 2MLC-F501 | MasterLogic-200R Fiber Optic Cable | Multimode fiber optic cable, 5.0 m |
| Honeywell 2MLR-CPUH/F | Redundant CPU | Redundant CPU with fiber optic communication configuration |
| Honeywell 2MLR-CPUH/T | Redundant CPU | Redundant CPU with TP communication configuration |
| Honeywell 2MLR-DBSF | Expansion Driver | Fiber optic expansion driver |
| Honeywell 2MLR-DBDF | Redundant Expansion Driver | Fiber optic redundant expansion driver |
It provides the multimode fiber optic synchronization link between the two CPU modules in a supported MasterLogic-200R redundant arrangement. The redundant CPUs and their configuration manage active/standby operation.
The 50/125 μm figure identifies the fiber core and cladding dimensions. The 850 nm value is the wavelength at which the specified bandwidth and attenuation characteristics are stated.
No. The 2MLC-F201 is a fiber optic synchronization cable for the redundant ML200R architecture. The 2MLC-E series is used for expansion I/O connections in the designated non-redundant CPU configuration.
Inspect the LC connectors and fiber route, confirm that the cable is connected to the correct synchronization interfaces, and review the CPU models and redundancy configuration. The controller diagnostics should be used to identify whether the fault is associated with the optical link or another part of the redundant system.