EA-PSI 9000 DT Desktop Programmable DC Power Supplies (320 W–1500 W)

Why EA-PSI 9000 DT for Industrial Testing

The EA-PSI 9000 DT series covers a broad operating range from 320 W to 1500 W, with output voltages up to 750 V.

It is suitable for environments where:

• R&D requires flexibility
• production requires repeatability and controlled behavior

Key characteristics

• Wide voltage and current coverage within a single device
• Digital and analog control options
• Configurable supervision and protection thresholds
• Remote sensing capability
• Discharge behavior for higher-voltage models

AC input note (important for deployment)

The devices support 90–264 Vac input with active PFC.
For 1.5 kW models, output power may be reduced to approximately 1 kW below 150 Vac input.

This should be considered when operating in regions or facilities with lower mains voltage.

Model Selection Overview

Typical selection criteria include voltage class, current requirement, and total output power.

Examples:

• 40 V class → low-voltage, higher-current applications
• 80 V class → control systems and automation rails
• 200 V and above → power electronics validation and stress testing

For higher-voltage models (≥200 V), ensure that:

• discharge behavior is aligned with internal safety procedures
• appropriate handling and test protocols are defined

Availability, pricing, and project quantities can be confirmed via the TPS Shop RFQ process.

Auto-Ranging Output (Constant-Power Behavior)

Auto-ranging enables the power supply to operate within a constant power envelope, rather than a fixed voltage/current rectangle.

This means:

• higher voltage is available at lower current
• higher current is available at lower voltage
• total output remains limited by nominal power

Practical implications

• Fewer device variants may be required across test benches
• Reduced need for reconfiguration between test cases
• Simplified replication of test setups across locations

Low Ripple and Measurement Consistency

For DUTs with sensitive components (e.g., analog front-ends, sensors, RF modules), output ripple can influence measurement results.

The EA-PSI 9000 DT includes an additional output filter to support low ripple operation.

Measurement recommendations

To ensure consistent results across benches:

• standardize oscilloscope bandwidth
• use consistent probe grounding
• align fixture layout and cabling

Safety and Fault Handling

Discharge Circuit (≥200 V models)

For higher-voltage models, the integrated discharge circuit supports reducing the output voltage to below 60 V DC after switch-off, particularly under low-load conditions.

This can help:

• reduce waiting times between test steps
• support safer handling during setup changes

Protection Functions

The system includes configurable:

• OVP – overvoltage protection
• OCP – overcurrent protection
• OPP – overpower protection
• OT – overtemperature protection

When thresholds are exceeded:

• the output is switched off
• status and alarm signals are provided

This supports predictable system behavior in automated environments.

Remote Sensing

Remote sensing compensates voltage drops across cables and fixtures by regulating directly at the load.

Benefits

• improved accuracy at the DUT
• reduced variation between test stations
• better reproducibility in production environments

Interfaces and Automation

The EA-PSI 9000 DT supports both digital and analog integration:

Digital interfaces

• USB
• Ethernet (SCPI-based control)

Analog interface (galvanically isolated)

• Selectable 0–5 V / 0–10 V ranges
• Control of voltage, current, power, resistance
• Monitor outputs and status signals

Typical workflow

• Engineering defines limits and supervision parameters
• Procurement standardizes selected models
• Production executes repeatable test sequences

Integrated Function Generator and Test Sequences

The integrated function generator can apply waveforms to:

• output voltage
• output current

Features

• Predefined waveform types (e.g., ramps, step profiles)
• Arbitrary sequences with up to 99 steps
• Save/load via USB interface

This allows implementation of structured test routines without additional external equipment in many cases.

RFQ Checklist for Procurement

Before requesting a quotation, confirm:

• Required output range (current and future needs)
• Mains conditions (possible derating at low input voltage)
• Safety procedures (especially for ≥200 V operation)
• Integration method (digital vs analog control)
• Test assets (sequences, calibration, documentation)

When Other Power Supply Types May Be More Suitable

A programmable desktop power supply is typically used for:

• validation
• characterization
• production testing

For continuous operation inside systems, other form factors may be more appropriate:

DIN-rail power supplies

• control cabinet applications
• continuous industrial operation

IPC / ATX power supplies

• embedded systems
• IT and industrial PCs

FAQ

Is the EA-PSI 9000 DT suitable for production environments?
It can be used in production test setups where controlled limits, repeatability, and interface integration are required.

What does auto-ranging change in practice?
It expands usable voltage/current combinations within a constant power limit.

Are USB and Ethernet included?
Yes, along with an isolated analog interface.

When is discharge behavior relevant?
For models with nominal output voltages ≥200 V.

Can complex test profiles be implemented without external equipment?
In many cases, yes, using the integrated function generator and sequence capability.