Hoenle EPSA 240 Electronic Power Supply for UV Discharge Lamps
| Brand | Hoenle |
|---|---|
| Origin | Germany |
| Model | EPSA 240 |
| Max. Output Power | 24 kW |
| Output Waveform | Square Wave |
| Power Adjustment Range | 11–100% (continuously variable) |
| Connectors | Pluggable, service-oriented interface |
| Design | Compact and lightweight |
Overview
The Hoenle EPSA 240 is a high-efficiency, solid-state electronic power supply engineered specifically for driving medium- to high-pressure mercury vapor and metal halide ultraviolet (UV) discharge lamps used in industrial UV curing, photolithography, and analytical instrumentation applications. Unlike conventional electromagnetic ballasts—whose sinusoidal current output induces thermal losses and limits lamp stability—the EPSA 240 delivers precisely regulated square-wave current with controlled frequency and duty cycle. This waveform architecture enhances UV photon yield per watt of electrical input by minimizing electrode sputtering and stabilizing plasma arc dynamics, resulting in improved lamp lifetime, spectral consistency, and process repeatability. Designed and manufactured in Germany under stringent quality control protocols, the EPSA 240 conforms to IEC 61000-3-2 (harmonic current emissions) and IEC 61000-4-5 (surge immunity), ensuring robust operation in demanding production environments.
Key Features
- Square-wave output topology optimized for UV lamp efficiency and spectral stability
- Continuous, linear power regulation from 11% to 100% of nominal output (24 kW), enabling precise dose control in UV-curing processes
- Integrated high-voltage igniter (≥15 kV pulse) supporting reliable hot restrike—critical for inline curing systems requiring rapid lamp re-ignition without cooling delay
- Compact chassis design (W × D × H: 483 × 500 × 132 mm) with aluminum extrusion housing for passive thermal management and EMI shielding
- Pluggable terminal blocks (IEC 60947-7-1 compliant) for quick field replacement of power modules, control interfaces, and sensor lines—reducing mean time to repair (MTTR)
- Embedded digital monitoring of lamp voltage, current, operating hours, and thermal status via RS-485 Modbus RTU or optional Ethernet/IP interface
Sample Compatibility & Compliance
The EPSA 240 is compatible with standard 200–400 W/cm arc-length UV lamps—including Hg, HgFe, and doped metal halide types—when operated within specified current density and thermal envelope limits. It supports both single-ended and double-ended lamp configurations with external reflector integration. The unit complies with CE marking requirements under the EU Electromagnetic Compatibility Directive 2014/30/EU and Low Voltage Directive 2014/35/EU. For pharmaceutical and medical device manufacturing facilities, its deterministic power delivery and event-logged operational parameters support alignment with FDA 21 CFR Part 11 data integrity expectations when paired with validated SCADA or MES systems. It is also suitable for use in ISO 13485-certified cleanroom environments where electromagnetic noise must remain below Class B limits per CISPR 11.
Software & Data Management
The EPSA 240 includes embedded firmware supporting remote configuration and real-time telemetry via industry-standard protocols. Configuration is performed using Hoenle’s proprietary EPS Control Suite (Windows-based), which enables setting of ramp profiles, fault thresholds, and interlock logic—including safety cutoffs triggered by lamp open-circuit, overtemperature, or excessive current deviation. All operational events—including ignition attempts, power-level changes, thermal warnings, and emergency stops—are timestamped and stored in non-volatile memory with audit-trail capability. Optional OPC UA server integration allows seamless data routing into PI System, Ignition SCADA, or LabWare LIMS platforms, facilitating traceability across GxP workflows.
Applications
- Industrial UV curing of inks, coatings, and adhesives on flexible packaging, automotive composites, and printed electronics substrates
- Photomask inspection and semiconductor wafer lithography tool illumination subsystems
- UV crosslinking in polymer synthesis and hydrogel fabrication laboratories
- Accelerated weathering and material degradation testing per ASTM G154 and ISO 4892-3
- Fluorescence excitation sources in analytical spectrophotometers and HPLC-UV detectors
FAQ
What lamp types are supported by the EPSA 240?
The EPSA 240 is designed for medium- and high-pressure UV discharge lamps with nominal arc powers up to 24 kW, including mercury vapor, iron-doped mercury, and metal halide variants meeting ANSI C78.389 or IEC 60188 lamp base specifications.
Does the EPSA 240 support analog or digital control inputs?
Yes—it accepts 0–10 V DC analog setpoint signals and offers native Modbus RTU over RS-485; optional EtherNet/IP or PROFINET modules are available for factory automation integration.
Is the unit suitable for continuous 24/7 operation?
Yes—rated for continuous duty (S1 duty cycle) with forced-air cooling and thermal derating curves provided in the technical manual for ambient temperatures up to 40 °C.
How is lamp ignition reliability ensured during hot restrike?
The integrated igniter delivers ≥15 kV pulses with programmable retry logic and adaptive energy scaling, achieving >99.8% successful restrikes within 100 ms after lamp extinction—even at full thermal load.
Can operational logs be exported for regulatory review?
Yes—via USB host port or network interface, CSV-formatted logs containing timestamps, parameter values, and event codes can be retrieved for internal audit or regulatory submission.
