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- Honeywell
- 2MLP-DC42
- Power Supply Module
- USA
- 155 × 120 × 85 mm
- 0.5 kg
- Xiamen, China
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Product Overview
The Honeywell 2MLP-DC42 is a DC-input power supply module for the MasterLogic-200 PLC system. It accepts a nominal 24 V DC input and converts it into a regulated 5 V DC output for the controller’s internal power distribution.
In industrial control cabinets where 24 V DC is already available from a centralized power supply, this module offers a way to supply the MasterLogic-200 controller without requiring a separate AC input at the PLC power module. It is particularly relevant to installations built around DC-powered instrumentation, control circuits, and distributed automation equipment.
The module delivers a rated 5 V DC output current of 6 A. This supply supports the operating requirements of the PLC hardware installed in the corresponding system configuration. Maintaining the correct power capacity is essential when a control system contains several I/O and communication modules.
For example, in a production machine with a MasterLogic-200 CPU, digital input modules, output modules, and fieldbus communication hardware, the 2MLP-DC42 supplies the required internal DC power through the PLC power architecture.
Its selection should take into account the CPU family, total module load, available 24 V DC supply capacity, and the electrical requirements of the complete controller configuration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model | 2MLP-DC42 |
| Product Type | Power Supply Module |
| Product Series | MasterLogic-200 |
| Rated Input Voltage | DC 24 V |
| Output Voltage | DC 5 V (±2%) |
| Output Current | 6.0 A |
| Input Efficiency | 60% or more |
| Inrush Current | 80 A peak or less |
| Input Fuse | Built-in |
| Overcurrent Protection | 6.6 A or more |
| Overvoltage Protection | 5.5–6.5 V |
| Allowable Momentary Interruption | 10 ms or shorter |
| Dimensions | 155 × 120 × 85 mm |
| Weight | 0.5 kg |
Product Features
1. 24 V DC Input
The 2MLP-DC42 operates from a nominal 24 V DC input. This makes it suitable for control cabinets that already use a DC power distribution system for PLC equipment and industrial control circuits.
2. Regulated 5 V DC Output
The module converts the incoming DC supply into a regulated 5 V DC output with a specified tolerance of ±2%. This output serves the internal power requirements of the MasterLogic-200 controller configuration.
3. 6 A Output Capacity
The rated output current is 6 A, allowing the module to supply the required power to a compatible MasterLogic-200 system. Actual loading should be evaluated against the combined requirements of the installed hardware.
4. Built-In Input Fuse
An internal fuse provides input-side circuit protection. The fuse is built into the module and is not intended for routine user replacement.
5. Overcurrent Protection
The output circuit includes overcurrent protection. When the current exceeds the specified protection threshold, the protection mechanism helps prevent continued operation under an excessive load condition.
6. Overvoltage Protection
The 5 V output circuit incorporates overvoltage protection within the specified 5.5–6.5 V range. This helps protect connected PLC electronics against abnormal output voltage conditions.
7. Power Status Indication
The module includes a voltage-status indicator. The LED illuminates when the output voltage is normal, allowing maintenance personnel to perform a basic visual check during system inspection.
8. DC-Powered PLC Integration
Its DC-input arrangement is useful in automation installations where the PLC power architecture is based on a 24 V DC supply rather than direct AC distribution.
Working Principle
The 2MLP-DC42 operates as a DC-to-DC power conversion module. It receives 24 V DC from the external control power source and converts that voltage into a regulated 5 V DC output for the MasterLogic-200 PLC system.
The conversion process is important because the PLC’s internal electronic circuits require a controlled supply voltage. Applying the incoming 24 V DC directly to circuits intended for 5 V operation would damage the connected hardware.
During normal operation, the module receives its input supply, performs voltage conversion, and maintains the specified output voltage within its rated operating conditions. The internal protection circuitry monitors abnormal electrical conditions.
A typical operating sequence includes:
- Receiving the 24 V DC input from the control power distribution system.
- Converting the incoming voltage through the internal power conversion circuit.
- Regulating the output to 5 V DC within the specified tolerance.
- Supplying power to the compatible MasterLogic-200 system.
- Monitoring output conditions through the module’s status indication.
- Activating the applicable protection mechanism if an abnormal electrical condition occurs.
Typical Power Distribution Path:
24 V DC Control Power Supply → 2MLP-DC42 → Regulated 5 V DC Output → MasterLogic-200 PLC Electronics
Example Industrial Operation:
In an automated packaging machine, the control cabinet may use a centralized 24 V DC power supply. The 2MLP-DC42 receives this voltage and converts it into the 5 V DC supply required by the compatible MasterLogic-200 PLC configuration. The CPU can then execute the control program while connected I/O and communication hardware operate within the system’s specified power requirements.
Role in MasterLogic-200 Control Architecture
Within the MasterLogic-200 architecture, the 2MLP-DC42 handles power conversion rather than application processing or field communication.
The CPU executes the PLC program, digital and analog modules handle field signals, and communication modules exchange information with external automation equipment. The power supply module supports these functions by maintaining the required internal DC power distribution.
The 2MLP-DC42 is particularly relevant to the ML200-IEC non-redundant architecture. Its application should be checked against the CPU model and the power requirements of the installed modules.
| Control System Component | Function |
|---|---|
| 2MLP-DC42 | 24 V DC input, 5 V DC power supply |
| 2MLP-ACF1 | AC input power supply with 5 V and 24 V outputs |
| 2MLP-ACF2 | AC input power supply with 5 V output |
| 2MLP-AC23 | AC input power supply with 8.5 A 5 V output |
| 2MLI-CPUS | Standard IEC CPU Module |
| 2MLI-CPUH | High Performance IEC CPU Module |
| 2MLI-CPUU | Enhanced IEC CPU Module |
| 2MLI-CPUS/P | Standard IEC CPU Module with applicable system configuration |
| 2MLB-M04A | Four-Slot Main CPU Base |
| 2MLB-M06A | Six-Slot Main CPU Base |
| 2MLB-M08A | Eight-Slot Main CPU Base |
| 2MLB-M12A | Twelve-Slot Main CPU Base |
| 2MLB-E04A | Four-Slot Expansion I/O Base |
| 2MLB-E08A | Eight-Slot Expansion I/O Base |
| Digital I/O Modules | Handle discrete field signals |
| Analog I/O Modules | Process continuous instrumentation signals |
| Communication Modules | Provide external network and serial connectivity |
Industrial Applications
| Application | Power Supply Function |
|---|---|
| Automated Production Lines | Supplies the MasterLogic-200 controller in DC-powered control cabinets |
| Packaging Machinery | Supports PLC operation and associated control electronics |
| Material Handling Systems | Supplies the controller coordinating conveyors and transfer equipment |
| Process Automation | Provides internal PLC power for process monitoring and control |
| Water Treatment Systems | Supports PLC installations using 24 V DC control power |
| Assembly Equipment | Supplies the controller managing automated machine sequences |
| Industrial Monitoring | Supports CPU and associated control hardware |
| Machine Control Cabinets | Integrates with centralized DC power distribution |
| Distributed Automation Systems | Supports compatible MasterLogic-200 controller configurations |
Installation and Maintenance
- Verify the Model Number: Confirm that the installed module is 2MLP-DC42 rather than an AC-input power supply or a redundant power module.
- Check CPU Compatibility: Verify that the selected power supply is supported by the installed MasterLogic-200 CPU family.
- Confirm Input Voltage: Ensure that the incoming supply is nominally 24 V DC and meets the module’s electrical requirements.
- Check Input Polarity: Verify the positive and negative DC connections before energizing the module.
- Inspect Input Wiring: Check cable condition, terminal tightness, and conductor suitability for the expected current.
- Evaluate Power Capacity: Confirm that the upstream DC power source can support the module’s input requirements under the expected operating load.
- Review System Power Demand: Calculate the combined power requirements of the installed controller hardware before commissioning.
- Inspect Module Installation: Ensure that the power supply is correctly seated in its designated installation position.
- Check Output Status: Observe the module’s voltage-status LED after applying power to confirm normal output indication.
- Investigate Protection Events: If the module enters a protection condition, check for short circuits, excessive loading, and abnormal downstream connections before restarting the system.
- Maintain Electrical Connections: Periodically inspect the power terminals and associated wiring for looseness, discoloration, or damage.
- Document Power Configuration: Record the input supply, connected CPU, installed modules, and system power calculations for future maintenance.
Compatible System Components
| Component | Product Type | Application |
|---|---|---|
| 2MLP-ACF1 | AC Power Supply Module | Alternative AC-input power configuration |
| 2MLP-ACF2 | AC Power Supply Module | Alternative AC-input power configuration |
| 2MLP-AC23 | High-Capacity AC Power Supply Module | 8.5 A 5 V DC output configuration |
| 2MLI-CPUS | Standard IEC CPU Module | PLC application processing |
| 2MLI-CPUH | High Performance IEC CPU Module | High-performance PLC processing |
| 2MLI-CPUU | Enhanced IEC CPU Module | Enhanced PLC processing |
| 2MLI-CPUS/P | Standard IEC CPU Module | PLC control configuration |
| 2MLB-M04A | Main CPU Base | Four-slot CPU system installation |
| 2MLB-M06A | Main CPU Base | Six-slot CPU system installation |
| 2MLB-M08A | Main CPU Base | Eight-slot CPU system installation |
| 2MLB-M12A | Main CPU Base | Twelve-slot CPU system installation |
| 2MLB-E04A | Expansion I/O Base | Four-slot I/O expansion |
| 2MLB-E06A | Expansion I/O Base | Six-slot I/O expansion |
| 2MLB-E08A | Expansion I/O Base | Eight-slot I/O expansion |
| 2MLB-E12A | Expansion I/O Base | Twelve-slot I/O expansion |
Recommended Related Models
| Model | Product Description |
|---|---|
| 2MLP-ACF1 | MasterLogic-200 AC Power Supply Module, 3 A |
| 2MLP-ACF2 | MasterLogic-200 AC Power Supply Module, 6 A |
| 2MLP-AC23 | MasterLogic-200 AC Power Supply Module, 8.5 A |
| 2MLI-CPUS | MasterLogic-200 Standard IEC CPU Module |
| 2MLI-CPUH | MasterLogic-200 High Performance IEC CPU Module |
| 2MLI-CPUU | MasterLogic-200 Enhanced IEC CPU Module |
Key Advantages
- Nominal 24 V DC input.
- Regulated 5 V DC output.
- Rated output current of 6 A.
- Output voltage tolerance of ±2%.
- Built-in input fuse.
- Integrated overcurrent protection.
- Integrated overvoltage protection.
- Output voltage status indication.
- Suitable for DC-powered MasterLogic-200 installations.
- Supports compatible ML200-IEC PLC configurations.
Technical FAQs
Can the 2MLP-DC42 operate directly from a 24 V DC control power supply?
Yes. The module has a nominal 24 V DC rated input and converts this supply into a regulated 5 V DC output for the compatible MasterLogic-200 system.
What is the difference between the 2MLP-DC42 and 2MLP-ACF2?
The primary difference is their input power source. The 2MLP-DC42 uses a 24 V DC input, whereas the 2MLP-ACF2 uses an AC input. Both provide a 5 V DC output rated at 6 A, but their input electrical requirements and installation arrangements differ.
What should be checked if the 2MLP-DC42 output voltage is abnormal?
Check the incoming 24 V DC supply, input wiring, connected load, and possible short circuits. Also inspect the module’s protection status and downstream power connections before restoring operation.
Can the 2MLP-DC42 be used in a redundant MasterLogic-200 power configuration?
The 2MLP-DC42 belongs to the non-redundant ML200-IEC power supply family. The MasterLogic-200 redundant architecture uses its designated 2MLR power modules. The two configurations should not be treated as interchangeable.