The NI RMX-4102 is a compact, single-channel programmable DC power supply designed for automated validation, production testing, laboratory measurement and rack-mounted power systems.
The RMX-4102 product family includes four voltage and current configurations, providing up to 432 W of output power, 100 VDC maximum voltage or 20 A maximum current. Its compact 2U, 1/6 rack-width design enables multiple power supplies to be integrated into a high-density test rack.
Key Features of the NI RMX-4102
- Single-channel programmable DC power supply
- Four voltage and current configurations
- Maximum output power up to 432 W
- Output voltage options up to 100 VDC
- Output current options up to 20 A
- Constant-voltage and constant-current operation
- USB 2.0 remote-control interface
- Ethernet/LAN connectivity
- RS232 serial control
- Analog programming and monitoring connections
- Front-panel buttons, display and adjustment knobs
- Internally powered design
- 2U height and compact 1/6 rack width
- Suitable for benchtop and rack-mounted operation
RMX-4102 Technical Specifications
| Product Model | RMX-4102 |
|---|---|
| Product Type | Programmable DC Power Supply |
| Number of Output Channels | 1 |
| Maximum Output Power | Up to 432 W, depending on configuration |
| Maximum Output Voltage | Up to 100 VDC, depending on configuration |
| Maximum Output Current | Up to 20 A, depending on configuration |
| Voltage Configurations | 0–20 V, 0–36 V, 0–60 V or 0–100 V |
| Current Configurations | 0–20 A, 0–12 A, 0–7 A or 0–4 A |
| Operating Modes | Constant voltage and constant current |
| Remote Interfaces | USB 2.0, Ethernet/LAN and RS232 |
| Analog Control | Supported |
| Power Source | Internally powered |
| Rack Height | 2U |
| Rack Width | 1/6 rack width |
| Supported Platform | Computer-based and standalone test systems |
| Product Status | Active |
RMX-4102 Part Numbers and Output Configurations
| Part Number | Voltage Range | Current Range | Maximum Power | Product Status |
|---|---|---|---|---|
| 786011-01 | 0–20 VDC | 0–20 A | 400 W | Active |
| 786012-01 | 0–36 VDC | 0–12 A | 432 W | Active |
| 786013-01 | 0–60 VDC | 0–7 A | 420 W | Active |
| 786010-01 | 0–100 VDC | 0–4 A | 400 W | Active |
The four RMX-4102 versions are separate hardware configurations. Select the part number that matches the maximum voltage and current required by the device under test.
Programmable Constant-Voltage Operation
In constant-voltage mode, the RMX-4102 regulates the output at the programmed voltage while supplying the current required by the load. A configurable current limit helps protect the DUT from excessive current.
This mode is commonly used for powering electronic assemblies, embedded controllers, automotive components, industrial devices and other equipment that requires a stable DC supply.
Programmable Constant-Current Operation
When the connected load attempts to draw more than the programmed current limit, the RMX-4102 transitions into constant-current operation. The power supply regulates current while reducing the output voltage as necessary.
Constant-current operation is useful for component testing, current-limited startup, LED evaluation and applications where excessive current could damage the DUT.
USB, LAN and RS232 Remote Control
The RMX-4102 supports USB 2.0, Ethernet/LAN and RS232 communication for integration into automated test systems. Engineers can remotely configure output voltage, current limits and operating states while retrieving instrument status and measurements.
LAN connectivity is useful for distributed test racks and remote laboratories. USB provides convenient direct computer control, while RS232 supports integration with industrial controllers and legacy automated systems.
Analog Programming and Monitoring
Analog control connections allow the RMX-4102 output to be programmed or monitored by an external control system. This functionality supports integration with PLCs, control circuits and specialized automated test equipment.
Before connecting an analog control signal, verify the required voltage range, grounding arrangement and connector pinout in the applicable RMX-4102 documentation.
Compact High-Density Rack Design
The RMX-4102 occupies only 1/6 of a standard rack width while maintaining a 2U height. Multiple units can therefore be installed together to create independently controlled power rails without consuming excessive rack space.
This modular configuration is useful when a test station must supply different voltage and current levels to several devices or sections of a product.
Front-Panel Operation
Front-panel buttons and adjustment knobs allow engineers to configure and operate the RMX-4102 without a computer. This makes the power supply suitable for interactive laboratory testing, troubleshooting and initial system setup.
For production testing, the same instrument can be controlled remotely through its digital or analog interfaces.
Typical RMX-4102 Applications
- Automated electronic product testing
- PCB and electronic assembly validation
- Automotive component testing
- Industrial equipment testing
- Power-management circuit evaluation
- Embedded system development
- LED and lighting product testing
- Battery-powered device simulation
- Manufacturing and burn-in systems
- Laboratory research and development
- Multirail rack-mounted power systems
Software and Automation Support
The RMX-4102 can be integrated into computer-controlled systems using supported NI drivers and programming interfaces. Engineers can build automated power sequences and measurement routines using LabVIEW, TestStand or other compatible development environments.
For reliable integration, verify the installed driver version, operating-system support, interface configuration and communication settings before developing the automated test sequence.
RMX-4102 Installation Considerations
Provide adequate airflow around the power supply and avoid blocking its cooling vents. When several RMX-4102 units are installed in one rack, review the total heat load, AC input requirements and rack ventilation.
Use output wiring with a suitable voltage, current and temperature rating. Higher-current configurations may require larger wire sizes to minimize heating and voltage drop.
RMX-4102 Troubleshooting
Why is the output voltage lower than the programmed value?
The power supply may have entered constant-current mode because the load is drawing more than the configured current limit. Check the DUT, current setting, output wiring and connection resistance.
Why is the full rated output power unavailable?
Confirm that the programmed voltage and current are within the operating range of the selected RMX-4102 configuration. The maximum voltage and maximum current cannot exceed the power envelope of the instrument.
Why can the computer not communicate with the RMX-4102?
Verify the selected USB, LAN or RS232 interface, driver installation, network address, serial settings and cable connections. For Ethernet control, confirm that the computer and power supply are accessible on the same network.
Why does the output shut down?
Check for overvoltage, overcurrent, overtemperature or other protection conditions. Inspect the load for shorts and ensure that airflow around the power supply is not restricted.
Why is there excessive voltage drop at the DUT?
Check the output cable length, conductor size and connector resistance. Use appropriately rated low-resistance wiring, especially with the 12 A and 20 A configurations.
RMX-4102 Comparison with Similar Programmable Power Supplies
| Model | Maximum Power | Maximum Voltage | Maximum Current | Rack Size |
|---|---|---|---|---|
| RMX-4101 | Up to 216 W | Up to 100 V | Up to 10 A | 2U, 1/6 width |
| RMX-4102 | Up to 432 W | Up to 100 V | Up to 20 A | 2U, 1/6 width |
| RMX-4104 | Up to 864 W | Up to 100 V | Up to 40 A | 2U, 1/6 width |
| RMX-4123 | 750 W | Up to 650 V | Up to 3.5 A | 1U, full width |
Recommended Related Products
- NI RMX-4101 Programmable Power Supply – suitable for applications requiring up to approximately 200 W in the same compact rack format.
- NI RMX-4104 Programmable Power Supply – offers higher output power and current for loads requiring up to 864 W or 40 A.
- NI RMX-4123 Programmable Power Supply – provides up to 650 V for higher-voltage device and insulation testing.
- NI RMX-4004 Power Distribution Unit – supports AC power distribution and control within rack-mounted test systems.
- NI PXI and PXI Express Modules – browse modular instruments for building an integrated automated test system.
How to Select the Correct RMX-4102 Configuration
Choose 786011-01 for low-voltage, high-current applications requiring up to 20 V and 20 A. Select 786012-01 when up to 36 V and 12 A are required, or 786013-01 for systems needing up to 60 V and 7 A.
The 786010-01 configuration is intended for higher-voltage applications requiring up to 100 V and 4 A. Always select the configuration according to both the maximum operating point and expected transient requirements of the DUT.
Why Choose the NI RMX-4102?
The RMX-4102 combines hundreds of watts of programmable DC power, multiple remote-control interfaces and a compact rack format. Its four output configurations make it suitable for building scalable automated test systems with different power-rail requirements.
Frequently Asked Questions
How many output channels does the RMX-4102 have?
The RMX-4102 is a single-channel programmable DC power supply.
What is the maximum output power?
Maximum power depends on the configuration and ranges from 400 W to 432 W.
What is the highest available output voltage?
The 786010-01 configuration supplies up to 100 VDC at a maximum current of 4 A.
What is the highest available output current?
The 786011-01 configuration supplies up to 20 A at a maximum voltage of 20 VDC.
Can the RMX-4102 be controlled remotely?
Yes. It supports USB 2.0, Ethernet/LAN, RS232 and analog control.
Can the RMX-4102 be used without a computer?
Yes. The front-panel display, buttons and adjustment knobs support standalone interactive operation.
Is the RMX-4102 a PXI module?
No. It is a standalone or rack-mounted programmable DC power supply that can be integrated with PXI-based automated test systems.
What are the RMX-4102 part numbers?
The selectable NI part numbers are 786010-01, 786011-01, 786012-01 and 786013-01.
Is the RMX-4102 still an active product?
Yes. NI currently classifies all four RMX-4102 configurations as active products.
Request a Quote for the NI RMX-4102
Contact us for current availability, lead time and project pricing for the NI RMX-4102 Programmable DC Power Supply. Please provide the required voltage, current, power and preferred part number so we can verify the correct configuration and compatible accessories.
