Introduction

The Honeywell 2MLI-CPUS/P CPU Module is a standard-performance IEC-compatible controller for the MasterLogic-200 PLC series. It provides centralized program execution and I/O coordination for compatible industrial automation systems.

Honeywell's model selection documentation specifies a maximum I/O capacity of 768 points and identifies the /P version as supporting a redundant power supply arrangement. This makes the model distinct from the standard 2MLI-CPUS and from the fully redundant 2MLR CPU family.

For maintenance engineers and system integrators, the 2MLI-CPUS/P can be considered for compatible installations that require a standard-performance PLC CPU with redundant power support. Before replacement or commissioning, confirm the power configuration, base compatibility, and controller program requirements.

Technical Specifications

Parameter	Specification
Brand	Honeywell
Model	2MLI-CPUS/P
Product Type	CPU Module
PLC Series	MasterLogic-200
CPU Performance Class	Standard
Programming Architecture	IEC-compatible
Maximum I/O Capacity	768 points
Program Memory	640 KB listed in the model selection guide
Power Supply Arrangement	Redundant power supply support
Redundant CPU Operation	Not provided by the `/P` designation
Dimensions	120 × 25 × 110 mm
Weight	0.13 kg / 0.29 lb

Dimensions and weight are based on the supplied product information. Confirm the applicable hardware revision and installation documentation before use.

Recommended Related Models

Honeywell 2MLI-CPUS CPU Module — Standard-performance IEC CPU with a higher listed I/O capacity.
Honeywell 2MLI-CPUH CPU Module — High-performance CPU for compatible MasterLogic-200 applications.
Honeywell 2MLI-CPUU CPU Module — Enhanced CPU model for applications requiring greater I/O capacity.
Honeywell 2MLR-CPUH/T CPU Module — Redundant CPU for systems using a twisted-pair communication interface.
Honeywell 2MLR-CPUH/F CPU Module — Redundant CPU for systems using a fiber-optic communication interface.
Honeywell 2MLR-AC12 Power Supply Module — Redundant AC power module for supported configurations.

Popular Related Models

Model	Product Description
Honeywell 2MLI-CPUS/P	Standard IEC CPU with Redundant Power Supply Support
Honeywell 2MLI-CPUS	Standard IEC CPU Module
Honeywell 2MLI-CPUH	High-Performance IEC CPU Module
Honeywell 2MLI-CPUU	Enhanced IEC CPU Module
Honeywell 2MLR-CPUH/T	Redundant CPU Module, Twisted-Pair Interface
Honeywell 2MLR-CPUH/F	Redundant CPU Module, Fiber-Optic Interface
Honeywell 2MLR-AC12	Redundant AC Power Supply Module
Honeywell 2MLB-M04A	4-Slot Main Base

Applications

The Honeywell 2MLI-CPUS/P CPU Module is a standard-performance IEC-compatible central processing unit designed for the Honeywell MasterLogic-200 PLC platform. It supports industrial control applications that require reliable program execution, I/O coordination, and integration with compatible automation hardware.

Unlike the standard 2MLI-CPUS, the 2MLI-CPUS/P version is specified for use with a redundant power supply arrangement. It supports a maximum of 768 I/O points, making it suitable for smaller and medium-sized control applications where power availability and operational continuity are important.

Typical applications include:

Manufacturing automation: Executing PLC logic for production machinery and automated equipment.
Process control: Coordinating connected input/output modules for monitoring and control tasks.
Industrial equipment management: Processing field signals and controlling equipment according to programmed logic.
Utilities and infrastructure: Supporting compatible automation systems where dependable controller operation is required.
System upgrades and maintenance: Serving as a replacement CPU when the existing hardware and configuration are compatible.

Advantages

Redundant power supply support: Designed to operate with the applicable redundant power supply arrangement.
IEC-compatible programming: Supports the MasterLogic-200 IEC-based PLC architecture.
Centralized control: Executes the control program and coordinates connected I/O modules.
Modular integration: Works within a compatible MasterLogic-200 system configuration.
Industrial application flexibility: Suitable for a range of automation tasks requiring standard CPU performance.
Defined I/O capacity: Supports up to 768 I/O points according to Honeywell's model selection documentation.

Technical FAQs

Q1: What is the Honeywell 2MLI-CPUS/P used for?

It is a standard-performance CPU module for the MasterLogic-200 PLC platform. It executes the control program and manages supported I/O operations.

Q2: What is the difference between 2MLI-CPUS and 2MLI-CPUS/P?

The 2MLI-CPUS/P model is specified for a redundant power supply arrangement and supports a maximum of 768 I/O points. The standard 2MLI-CPUS supports up to 3,072 I/O points. Verify system requirements before selecting a replacement.

Q3: Does the 2MLI-CPUS/P provide redundant CPU operation?

No. The /P designation refers to the redundant power supply configuration, not a fully redundant CPU arrangement. It should not be confused with the 2MLR redundant CPU series.

Q4: What is the maximum I/O capacity?

Honeywell's model selection documentation specifies a maximum of 768 I/O points for the 2MLI-CPUS/P.

Q5: Is the module IEC-compatible?

Yes. It is identified as a standard IEC CPU module within the MasterLogic-200 series.

Q6: Which power supply should be used?

The 2MLI-CPUS/P is intended for the applicable redundant power supply configuration. Confirm the approved power modules and wiring arrangement in the system documentation before installation.

Q7: Can the module be installed in any MasterLogic-200 base?

Base compatibility must be verified for the specific CPU and system configuration. Do not assume every base or rack is interchangeable.

Q8: Can an existing PLC program be transferred to a replacement module?

Program transfer may be possible, but compatibility depends on the original CPU, firmware, programming environment, and project configuration. Back up the application and verify the migration procedure before replacement.

Q9: What should be checked if the CPU does not start?

Check power supply status, module seating, base connections, CPU status indicators, and any reported controller diagnostics. Follow the manufacturer's troubleshooting procedure before returning the system to operation.

Q10: What should be confirmed before purchasing a 2MLI-CPUS/P?

Confirm the complete model number, I/O capacity, power supply arrangement, base compatibility, firmware requirements, and program compatibility. Also verify the physical label and the condition of the supplied unit.

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