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- Emerson
- VE5005
- Power Supply
- USA
- 393.7 × 63.5 × 127 mm
- 2.63 kg
- Xiamen, China
- New & In Stock
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| 12 VDC nominal | |
| Conversion Type | DC-to-DC |
| Primary Function | Converts 24 VDC input power to 12 VDC output |
| Dimensions | 393.7 × 63.5 × 127 mm |
| Weight | 2.63 kg |
Product Features
- DC-to-DC conversion: Converts a nominal 24 VDC input into a 12 VDC output for compatible loads.
- Bulk power conversion: Serves as a voltage-conversion stage within an industrial control cabinet.
- Separate voltage distribution: Allows selected devices to operate at 12 VDC while the upstream cabinet distribution remains at 24 VDC.
- Control-system integration: Can be incorporated into an automation power architecture when the connected equipment’s electrical requirements are met.
- Centralized installation: Keeps voltage conversion within the cabinet rather than requiring separate conversion at each device.
- System-level power planning: Allows the upstream 24 VDC source and downstream 12 VDC loads to be assessed as part of the same power budget.
Working Principle
The VE5005 receives a nominal 24 VDC input and converts it to a nominal 12 VDC output for compatible equipment.
24 VDC Input → VE5005 → 12 VDC Output → Compatible Loads
The upstream supply provides the input energy, while the VE5005 performs the voltage conversion required by the downstream circuit. The connected device draws current according to its operating conditions, so the converter must be selected according to the output load and its startup requirements.
In a control cabinet, the input may come from a 24 VDC distribution terminal, while the output feeds a separate 12 VDC branch. The branch wiring and protection should match the connected load, and the output voltage should be checked under operating conditions rather than only when the circuit is unloaded.
When diagnosing a power issue, measuring both the converter input and output helps distinguish an upstream supply problem from a conversion-stage fault or excessive downstream load.
Role in a DeltaV Control System Power Architecture
The VE5005 functions as a DC voltage-conversion stage in a control-system power arrangement. It differs from an AC/DC supply, which converts incoming AC power, and from a controller or I/O module, which performs control processing or signal acquisition.
24 VDC Distribution → VE5005 → 12 VDC Distribution → Compatible Equipment
| System Element | Function |
|---|---|
| Upstream 24 VDC Supply | Provides DC power to the conversion stage |
| 24 VDC Distribution | Routes input power to the VE5005 |
| VE5005 Power Supply | Converts 24 VDC input to 12 VDC output |
| 12 VDC Distribution | Routes the converted output to compatible loads |
| Branch-Circuit Protection | Protects wiring and downstream circuits according to the installation design |
| Control-System Accessories | Use the converted supply where their electrical requirements match |
| DeltaV Controller and I/O Hardware | Perform control and signal-processing functions using their specified power arrangements |
| Grounding and Bonding | Provides the protective connections required by the cabinet design |
The actual arrangement depends on the connected equipment and the system’s power requirements. The 12 VDC output should only be connected to devices rated for that supply, and the VE5005 should not be assumed to power every DeltaV controller or I/O module directly.
Industrial Applications
| Application | Typical Use |
|---|---|
| Process Automation | Providing 12 VDC to compatible auxiliary control equipment |
| Oil and Gas | Supplying DC-powered interface devices within automation cabinets |
| Water Treatment | Powering compatible monitoring and instrumentation accessories |
| Chemical Processing | Converting cabinet DC power for devices requiring 12 VDC |
| Manufacturing | Supplying lower-voltage equipment from a 24 VDC distribution system |
| Utility Systems | Providing a separate DC voltage for compatible auxiliary loads |
| Control Cabinets | Creating a 12 VDC branch from an existing 24 VDC source |
| Industrial Instrumentation | Supplying devices whose specified input voltage matches the converter output |
Installation and Maintenance
- Confirm the VE5005 model and verify that the intended application requires conversion from 24 VDC to 12 VDC.
- Check the upstream DC supply and confirm that its voltage and available current meet the converter’s input requirements.
- Isolate the power source before installation or wiring and verify that the circuit is de-energized.
- Mount the unit in a suitable location according to the cabinet’s installation requirements.
- Provide adequate clearance for wiring, ventilation, and maintenance access.
- Connect the 24 VDC input with the correct polarity and specified terminal arrangement.
- Connect the 12 VDC output only to equipment rated for that voltage.
- Calculate the combined downstream load and verify that the converter’s output capacity is sufficient.
- Check conductor sizing, branch protection, and expected voltage drop on the output circuit.
- Energize the converter and measure the output voltage before connecting or enabling sensitive downstream equipment.
- Verify the output again under normal operating load and investigate unexpected voltage variation.
- If a downstream device loses power, inspect the input source, wiring, protection devices, converter connections, and load current before replacing the power supply.
For installations with multiple 12 VDC loads, calculate the combined demand and account for startup current. A converter may show the expected voltage without a load but experience excessive voltage drop or shutdown when the connected equipment draws more current than the available output capacity.
Related Components
| Component | Function |
|---|---|
| 24 VDC Power Supply | Provides the upstream DC input |
| 24 VDC Distribution Terminal Block | Routes input power to the converter |
| VE5005 Power Supply | Converts 24 VDC input into 12 VDC output |
| 12 VDC Distribution Terminal Block | Distributes converted power to downstream branches |
| DC Branch-Circuit Protection | Protects downstream wiring and equipment |
| DC Power Wiring | Carries input and output power between components |
| Protective-Earth Connection | Provides protective grounding as required by the installation |
| Voltage Measuring Instrument | Checks input and output voltage during commissioning |
| Compatible 12 VDC Equipment | Receives power from the converter |
| DeltaV Controller and I/O Hardware | Performs control and process-signal functions using the specified power arrangement |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Emerson VE5003 | Bulk AC to 24 VDC Power Supply | Providing a 24 VDC source from an AC input |
| Emerson VE5005 | Bulk 24 VDC to 12 VDC Power Supply | Converting 24 VDC distribution to 12 VDC |
| Emerson VE5001 | DeltaV M-Series AC/DC System Power Supply | Supplying compatible M-Series control hardware |
| Emerson DeltaV System Power Supplies | Control-system power-supply family | Providing power for compatible controller and I/O arrangements |
| 24 VDC Distribution Equipment | DC power distribution components | Routing upstream power to converters and other loads |
| 12 VDC Distribution Equipment | Low-voltage DC distribution components | Distributing converted power to compatible equipment |
Key Advantages
- Converts nominal 24 VDC input power to nominal 12 VDC output.
- Allows compatible lower-voltage equipment to operate from an upstream 24 VDC distribution system.
- Separates voltage conversion from the controller and I/O signal-processing functions.
- Supports centralized DC conversion within an industrial control cabinet.
- Simplifies planning for systems with different DC voltage requirements.
- Can be integrated into a structured DC distribution arrangement with suitable wiring and circuit protection.
Technical FAQs
What is the function of the Emerson VE5005 DeltaV Bulk 24 VDC to 12 VDC Power Supply?
The VE5005 converts a nominal 24 VDC input into a nominal 12 VDC output for compatible downstream equipment. It is used where the upstream DC distribution voltage differs from the input voltage required by an auxiliary device or interface.
How do I determine whether the VE5005 can supply enough current to a 12 VDC load?
Calculate the combined current demand of the connected devices, including startup and transient loads. Compare the result with the converter’s rated output capacity, and account for wiring voltage drop and branch-circuit protection. The converter’s output-current rating must be confirmed before finalizing the load configuration.
Can the VE5005 directly replace a 24 VDC power supply?
No, not where the connected equipment requires 24 VDC input. The VE5005 is intended to convert 24 VDC input into 12 VDC output. Replacing a 24 VDC source with a 12 VDC converter output could leave equipment outside its specified operating range. Confirm the voltage requirements of the load and the role of the existing supply before making a substitution.
What should I check if the VE5005 output drops when equipment is connected?
Measure the input voltage and output voltage while the downstream equipment is operating. Check whether the upstream supply can maintain its voltage under load, whether the connected devices exceed the available output capacity, and whether wiring or terminal connections introduce excessive voltage drop. If the input remains within its required range and the load is within the converter’s ratings, investigate the converter and connected circuit for faults.