Your Industrial System Already Has a 24V DC Bus — Why Would It Still Need Separate 12V and 24V Auxiliary Power?

24VDC is widely used as a main power bus in industrial automation, remote monitoring and outdoor control systems.

However, not every device inside the system should necessarily operate directly from the same 24V power rail.

A typical industrial control or monitoring system may contain:

• 12V industrial communication equipment;

• 12V monitoring and data acquisition devices;

• 24V sensors;

• 24V remote I/O modules;

• PLCs and industrial controllers;

• Field monitoring and auxiliary equipment.

This creates a practical power design question:

How can a system provide both 12V and 24V auxiliary power while electrically isolating sensitive loads from the main DC bus?

The MINGZINC MDC150-24D12&24 is designed for this type of dual-voltage auxiliary power architecture.

One DC Input, Two Auxiliary Output Rails

The MDC150-24D12&24 is a 150W isolated dual-output DC-DC converter designed to provide two auxiliary voltage rails from an industrial DC source:

24V-class DC Input → 12VDC + 24VDC Dual Output

This allows one power module to support two different groups of loads.

For example, the 12VDC output can supply industrial routers, communication modules, data acquisition equipment, monitoring electronics and other 12V control devices.

The 24VDC output can support sensors, remote I/O, controllers and other 24V field equipment.

Instead of installing separate DC-DC converters for each auxiliary voltage, both power rails can be integrated into a single module.

If the Input Is Already 24V, Why Generate an Isolated 24V Output?

This is an important point when evaluating this type of power architecture.

At first glance, using a 24V input to generate another 24V output may appear unnecessary.

But in industrial systems:

The same voltage does not necessarily mean the same power domain.

The main 24V bus may also supply relays, actuators, switching devices, control electronics and other loads.

Transient disturbances and electrical noise generated by these devices can propagate through a shared power path and potentially affect sensitive monitoring or control electronics.

An isolated DC-DC stage creates a separate electrical boundary:

Main 24V Bus → Isolated DC-DC Converter → Auxiliary 24V Rail

In this case, the purpose of the 24V output is not simply voltage conversion.

It is also about galvanic isolation and creating a dedicated auxiliary power domain for selected equipment.

Why Are 12V and 24V Dual Outputs Useful for Remote Monitoring Systems?

Remote industrial sites and outdoor monitoring cabinets often contain equipment operating at different voltage levels.

A typical system may include:

12V Loads

Industrial 4G/5G routers, communication terminals, data loggers, monitoring electronics and embedded controllers.

24V Loads

Remote I/O modules, industrial sensors, PLC peripherals, monitoring devices and other field electronics.

Using an individual converter for each voltage rail means additional power modules, wiring and installation space.

With the MDC150-24D12&24, the auxiliary power architecture can be simplified to:

Industrial DC Bus → MDC150-24D12&24 → 12V + 24V

This approach is particularly useful in industrial cabinets where installation space and wiring complexity need to be controlled.

What Problems Can Isolated Auxiliary Power Help Address?

Industrial electrical environments are often much more complex than laboratory conditions.

Long cable runs, relay switching, inductive loads, power electronics and different grounding paths can all introduce disturbances into the power system.

In real equipment, engineers may encounter symptoms such as:

• Communication equipment restarting unexpectedly;

• Interrupted data logging;

• Unstable sensor readings;

• Intermittent remote I/O communication;

• Controller resets;

• Unexplained field-device interruptions.

These symptoms are not always caused by the power supply.

However, when troubleshooting system stability, auxiliary power quality and isolation between different power domains are important areas to investigate.

The MDC150-24D12&24 provides galvanic isolation between the input side and the auxiliary output side, helping establish a dedicated power path for 12V and 24V loads.

150W Power Platform for Multiple Auxiliary Loads

Industrial auxiliary power rails rarely supply only one device.

The 12V rail may support communication and data acquisition equipment, while the 24V rail may simultaneously supply sensors, I/O modules and other field electronics.

Therefore, selecting a dual-output DC-DC converter should involve more than asking:

“Does it provide 12V and 24V?”

Engineers should also consider:

How much power does the 12V rail require?

How much power does the 24V rail require?

What is the combined load when both outputs are operating?

Are there transient load requirements during startup or operating-state changes?

The MDC150-24D12&24 is based on a 150W power platform for industrial systems with multiple auxiliary loads.

For project selection, the actual load distribution between the two output rails should be evaluated according to the application.

Why We Can Do It

Industrial DC-DC converter reliability involves more than input voltage, output voltage and rated power.

The MDC series is designed around the operating conditions found in real industrial equipment.

Galvanic Isolation

Electrical isolation creates a defined boundary between the main DC bus and auxiliary loads, helping separate different power domains within the system.

Potted Construction

The internal structure is potted to improve mechanical stability and support operation in industrial environments where vibration, dust and other environmental factors may be present.

EMI/EMC-Oriented Design

The power architecture considers electromagnetic interference found in cabinets containing communication devices, controllers, relays and switching electronics.

Dynamic Load Response

Communication modules, controllers and field devices can change operating states rapidly. The DC-DC converter is designed to respond to changing load conditions.

Multiple Protection Functions

Depending on the product configuration, protection functions can include UVP, OVP, OCP, SCP and OTP for abnormal input, output and temperature conditions.

Production and Quality Control

Component selection, assembly, potting and final electrical testing are controlled throughout production to support consistency for OEM and batch applications.

Where Can the MDC150-24D12&24 Be Used?

The MDC150-24D12&24 is particularly suitable for systems where 12V and 24V auxiliary loads coexist within the same industrial DC architecture.

Typical applications include:

Industrial automation control cabinets, remote monitoring systems, industrial communication cabinets, solar monitoring systems, energy management equipment, PLC control systems, remote I/O systems, industrial data acquisition equipment, outdoor control cabinets and OEM industrial machinery.

For unattended and outdoor monitoring systems, reliable auxiliary power is especially important because communication, data acquisition and field monitoring equipment may need to operate continuously for long periods.

OEM/ODM Dual-Output DC-DC Power Solutions

The required power distribution between the 12V and 24V outputs can vary significantly from one application to another.

In addition to standard products, MINGZINC supports OEM/ODM requirements involving:

Input voltage range, dual-output combinations, output power distribution, electrical interfaces, mounting structure, thermal design and other project-specific parameters.

For a new equipment project, you can provide:

Input Voltage Range + 12V Load Requirement + 24V Load Requirement + Application

We can then evaluate the appropriate dual-output DC-DC power configuration for the actual system architecture.

One Power Module for Both 12V and 24V Auxiliary Loads

If your equipment already has an industrial DC power bus but internally requires both 12V communication/control electronics and 24V field equipment, power design is not only about voltage conversion.

It is also worth considering:

How can the number of separate power modules be reduced?

How can an isolated auxiliary power domain be created?

How can 12V and 24V loads be integrated into a simpler power architecture?

With its 150W power platform, galvanic isolation and 12V/24V dual outputs, the MDC150-24D12&24 provides an integrated approach for this type of industrial auxiliary power requirement.

For project evaluation, send us:

Input Voltage Range + 12V Load + 24V Load + Application

We can evaluate the appropriate DC-DC power solution for your system.