For system integrators, panel builders, and electrical engineers designing industrial control panels for the North American market, selecting a power supply is not just about meeting voltage and current specifications—it is about ensuring compliance with UL 508, the cornerstone safety standard for industrial control equipment. A non-compliant power supply can delay panel certification, increase project costs, and create safety risks for operators and equipment.
The EA-PS 5200-02A, distributed by TPS Elektronik, is a high-performance programmable desktop DC power supply from the EA-PS 5000 A series. It accepts 90–264V AC input—including standard North American 120V AC—and delivers 0–200V DC at 0–2A with 160W total output power. With <0.08% voltage load regulation, <30mV RMS ripple, and EN 55022 Class B EMC compliance, this 120V power supply is engineered for laboratory, testing, and industrial applications where precision, reliability, and regulatory compliance are non-negotiable.
1. The Industrial Control Challenge: Powering Panels for the North American Market
Industrial control panels are the nerve centers of modern manufacturing and process automation. They house PLCs (Programmable Logic Controllers), I/O modules, contactors, motor starters, circuit breakers, and human-machine interfaces—all interconnected to control everything from assembly lines to wastewater treatment plants.
For system integrators and panel builders serving the North American market, every component inside the panel must meet the requirements of UL 508A, the standard for Industrial Control Panels. UL 508A covers industrial control panels intended for general industrial use, operating from a voltage of 1,000 volts or less. It addresses everything from enclosure type and wire size to proper separation of power circuits from Class 2 circuits.
When it comes to power supplies, UL 508 imposes specific requirements:
- Creepage and clearance distances: Defined based on input voltage—for a 120V or 240V input, creepage distance between primary and secondary must be at least 2.4 mm
- Temperature testing: Power supplies must comply with the Temperature Test in UL 508
- Component ratings: Recognized power supplies must meet UL 1012 requirements
- Circuit protection: Power supplies must be properly protected with overcurrent protection devices sized per UL 508A Table 11-4
For panel builders, sourcing a power supply that is UL-recognized simplifies the panel certification process. The EA-PS 5200-02A is designed with these requirements in mind, providing the precision and reliability needed for UL 508A-compliant panel designs.
2. Product Overview: EA-PS 5200-02A Programmable DC Power Supply
The EA-PS 5200-02A (order number 05100304) is a microprocessor-controlled programmable DC power supply belonging to the EA-PS 5000 A series. It is designed for laboratory, testing, and industrial applications where precision, reliability, and flexibility are paramount.
Key specifications at a glance:
- Output: 0–200V DC, 0–2A, 0–160W (auto-ranging)
- Input: 90–264V AC, 45–65Hz with active PFC (power factor >0.95)
- Voltage load regulation: <0.08%
- Voltage line regulation: <0.02%
- Voltage ripple: <150mV PP, <30mV RMS
- Current ripple: <8mA PP
- Load regulation time: <1.5ms
- Voltage/current accuracy: <0.2%
- Efficiency: Up to 92%
The unit features a blue LCD display for clear parameter monitoring, 9 preset memories for quick recall of frequently used settings, a key lock function to prevent accidental changes, and a recall function for easy configuration retrieval. Convection cooling ensures quiet, maintenance-free operation, making it suitable for both laboratory and production environments.
For procurement teams evaluating high voltage programmable power supply options, the EA-PS 5200-02A offers the precision, programmability, and UL-compliant design that industrial control applications demand.
3. UL 508 Compliance: What It Means for Industrial Control Panels
For panel builders and system integrators serving the North American market, UL 508A is not optional—it is a requirement for legal installation and insurance coverage. The standard covers industrial control panels intended for general industrial use at nominal voltages of 1,000 Volts or less.
Key aspects of UL 508A relevant to power supplies include:
1. Component Recognition: Power supplies must be recognized components, typically listed under UL 1012 (General Purpose Power Supplies). Recognized power supplies have been tested for safety and performance, reducing the burden on panel manufacturers.
2. Creepage and Clearance: For a 120V AC or 240V AC input, the creepage distance between primary and secondary circuits must be at least 2.4 mm. The EA-PS 5200-02A’s internal design meets these spacing requirements, ensuring safe isolation between input and output.
3. Temperature Limits: UL 508 requires that power supplies pass temperature testing to ensure they do not exceed safe operating temperatures under normal and abnormal conditions. The EA-PS 5200-02A’s convection cooling design and high efficiency (up to 92%) minimize heat generation, making it well-suited for panel environments where temperature rise is a concern.
4. SCCR and Circuit Protection: The Short Circuit Current Rating (SCCR) of the panel must be properly determined. Power supplies must be protected with appropriately sized overcurrent protection devices. When integrating the EA-PS 5200-02A into a UL 508A panel, the power supply’s input protection coordinates with panel branch circuit protection.
By choosing a power supply designed with UL 508 compliance in mind, panel builders can streamline the certification process, reduce project risk, and ensure that their panels meet the highest standards of safety and reliability. The EA-PS 5200-02A provides the precision, stability, and safety features that UL 508A panels require.
4. Auto-Ranging Technology for Flexible Testing
One of the defining features of the EA-PS 5200-02A is its auto-ranging output stage. Unlike traditional power supplies with a fixed voltage-current curve, auto-ranging technology allows the power supply to deliver full rated power across a wide range of voltage and current combinations.
For a 160W power supply with auto-ranging:
- At 200V, the supply can deliver up to 0.8A (160W)
- At 100V, the supply can deliver up to 1.6A (160W)
- At 80V, the supply can deliver up to 2A (160W—limited by current)
This flexibility is invaluable for industrial control panel testing applications where the load may vary significantly. A single power supply can be used to test multiple PLC modules, I/O cards, and control circuits with different voltage and current requirements—reducing the need for multiple power supplies on the test bench.
For precision programmable power supply applications in control system validation, the auto-ranging capability allows engineers to simulate various operating conditions without manual reconfiguration. The 9 preset memories store frequently used voltage and current settings, enabling quick switching between different test scenarios.
5. Precision and Stability for PLC and Control System Validation
Industrial control systems demand exceptional power supply precision. Voltage fluctuations can translate directly to PLC logic errors, analog measurement drift, and unexpected contactor behavior—all of which can cause production stoppages or equipment damage.
The EA-PS 5200-02A delivers the precision that low noise programmable power supply applications require:
- <0.08% voltage load regulation: Output voltage changes by less than 0.08% from no load to full load, ensuring stable operation of sensitive control circuits
- <0.02% voltage line regulation: Output voltage remains stable even as input AC voltage fluctuates—critical when powered from 120V AC mains with varying loads
- <30mV RMS voltage ripple: Ultra-low ripple ensures clean DC power that does not introduce noise into PLC analog inputs or communication circuits
- <8mA PP current ripple: Minimal current ripple protects sensitive loads from current-induced stress
- <0.2% voltage and current accuracy: Precise setpoint accuracy for repeatable test results
- <1.5ms load regulation time: Fast transient response maintains voltage stability during rapid load changes
For PLC system testing, these specifications ensure that the power supply does not introduce artifacts that could mask true system behavior. Engineers can confidently validate control logic, analog measurements, and communication performance without worrying about power supply-induced errors.
6. Silent, Compact Design for Laboratory and Production Environments
Industrial control panel testing and validation often happen in environments where noise and space are concerns. The EA-PS 5200-02A addresses these realities with a silent, compact design:
- Convection cooling: No fans means zero acoustic noise—ideal for laboratory environments where concentration matters and for production floors where fan reliability is a concern
- Compact footprint: 200×87×301 mm dimensions, weighing only 3 kg—fits easily on a crowded test bench or can be moved between workstations
- Maintenance-free operation: No moving parts means no fan maintenance, no filter cleaning, and no fan failure-related downtime
For multi-channel programmable power supply applications where multiple power supplies may be used simultaneously, the compact footprint and convection cooling allow side-by-side placement without thermal interference or excessive noise.
The USB interface with LabView VIs and Windows control software enables automated testing and system integration. For panel builders running production test sequences, this remote control capability reduces test time and ensures consistent, repeatable results.
7. Technical Specifications at a Glance
| Parameter | Specification |
|---|---|
| Model | EA-PS 5200-02A (PN: 05100304) |
| Output Voltage | 0–200V DC |
| Output Current | 0–2A |
| Output Power | 0–160W (auto-ranging) |
| Input Voltage | 90–264V AC, 45–65Hz |
| Power Factor | >0.95 (active PFC) |
| Efficiency | Up to 92% |
| Voltage Load Regulation | <0.08% |
| Voltage Line Regulation | <0.02% |
| Voltage Ripple (RMS) | <30mV |
| Voltage Ripple (PP) | <150mV |
| Current Ripple (PP) | <8mA |
| Load Regulation Time | <1.5ms |
| Voltage/Current Accuracy | <0.2% |
| Display | Blue LCD |
| Preset Memories | 9 |
| Interface | USB (LabView VIs included) |
| Protection | OVP, OCP, OPP, Overtemperature |
| Cooling | Convection (fanless) |
| Dimensions (W×H×D) | 200×87×301 mm |
| Weight | 3 kg |
| Compliance | SELV, EN 55022 Class B |
