The Elektro-Automatik EA-PSI 9000 DT series are programmable DC power supplies, with an intuitive touch panel, built in function generator and extensive set of standard features. The EA-PSI 9000 DT are available in a variety of voltage and current configurations to suit many different applications.

Display and control panel

Set values and actual values of output voltage, output current and output power are clearly represented on the graphic display. The color TFT screen is touch sensitive and can be intuitively used to control all functions of the device with just a finger. Set values of voltage, current, power or resistance (internal resistance simulation) can be adjusted using the rotary knobs or entered directly via a numeric pad. To prevent unintentional operations, all operation controls can be locked.
 

Auto-ranging power stage
 

All models are equipped with a flexible auto-ranging output stage which provides a higher output voltage at lower output current, or a higher output current at lower output voltage, always limited to the max. nominal output power. The maximum power set value is adjustable with these models. Therefore, a wide range of applications can already be covered by the use of just one unit.

Protective features

 

For protection of the equipment connected, it is possible to set an overvoltage protection threshold (OVP), as well as one for overcurrent (OCP) and overpower (OPP).

As soon as one of these thresholds is reached for any reason, the DC output will be immediately shut off and a status signal will be generated on the display and via the interfaces. There is furthermore an over-temperature protection, which will shut off the DC output if the device overheats.

Remote sensing
 

The standard sensing input can be connected directly to the load in order to compensate voltage drops along the cables. If the sensing input is connected to the load, the power supply will detect this and adjust the output voltage automatically to ensure the accurate required voltage is available at the load.

Built in analog interface
 

There is a galvanically isolated analog interface terminal, located on the rear of the device. It offers analog inputs to set voltage, current, power and resistance from 0...100% through control voltages of 0 V...10 V or 0 V...5 V. To monitor the output voltage and current, there are analog outputs with 0 V...10 V or 0 V...5 V. Also, several inputs and outputs are available for controlling and monitoring the device status.

Function generator

All models within this series include a true function generator which can generate typical functions, as displayed in the figure below, and apply them to either the output voltage or the output current. The generator can be completely configured and controlled by using the touch panel on the front of the device, or by remote control via one of the digital interfaces. The predefined functions offer all necessary parameters to the user, such as Y offset, time / frequency or amplitude, for full configuration ability.
 

In addition to standard functions, this base generatorcan be used for the creation and execution of complex sets of functions, separated into up to 99 sequences. These can be used for testing purposes in development and production. The sequences can be loaded from and saved to a standard USB flash drive via the USB port on the front panel, making it easy to change between different test sequences.

Fictional example of a complex function (40 sequences) as it can be realized with the arbitrary generator. The function can be created on the device or externally and then loaded or saved:

 

Presetting of output values

To set output values without a direct impact on the output condition, the set values are also shown on the display, positioned below the actual values.

With this, the user can preset required values for voltage, current and pow-er. It is either done by using the rotary knobs or by direct input on the touch panel. The five user profiles furthermore enable the user to switch easily between often used set values, just by activating a different user profile.

Supervision features

All models offer supervision features for voltage and current steps. The supervision is configurable to monitor voltage or current over and under-shooting. As a reaction, the device can generate a notification of selectable type:

• Signals are displayed only; even if the fault is still active, without affecting the output
• Warnings remain active and must be acknowledged after the fault is removed
• Alarms will instantly shut off the output

Control software
 

Included with the device is a control software for Windows PC, which allows for the remote control of multiple identical or even different types of devices. It has a clear interface for all set and actual values, a direct input mode for SCPI and ModBus RTU commands, a firmware update feature and the semi-automatic table control named "Sequencing". Optionally unlockable with a licence code, the app "Multi Control" can monitor and control up to 20 units at once and in one windows. The sequencing feature and data logging are here available as well.

Available in many configurations

The Elektro-Automatik EA-PSI 9000 DT power supplies are available in many different voltage and current formats. The following is an overview of each::

 

Model	Voltage	Current	Power	Efficiency	Ripple U (2	Ripple I
PSI 9200-04 DT	0...200 V	0...4 A	0...320 W	≤89%	20 mVPP / 2.5 mVRMS	1.5 mARMS
PSI 9040-40 DT	0...40 V	0...40 A	0...640 W	≤89%	8 mVPP / 0.8 mVRMS	1 mARMS
PSI 9200-10 DT	0...200 V	0...10 A	0...640 W	≤92%	20 mVPP / 2.5 mVRMS	1.5 mARMS
PSI 9200-15 DT	0...200 V	0...15 A	0...1000 W	≤93%	60 mVPP / 9 mVRMS	1.8 mARMS
PSI 9360-10 DT	0...360 V	0...10 A	0...1000 W	≤93%	58 mVPP / 11 mVRMS	2 mARMS
PSI 9750-04 DT	0...750 V	0...4 A	0...1000 W	≤93%	94 mVPP / 16 mVRMS	10 mARMS
PSI 9080-60 DT	0...80 V	0...60 A	0...1500 W	≤92%	10 mVPP / 1.5 mVRMS	6 mARMS
PSI 9200-25 DT	0...200 V	0...25 A	0...1500 W	≤93%	60 mVPP / 9 mVRMS	1.8 mARMS
PSI 9360-15 DT	0...360 V	0...15 A	0...1500 W	≤93%	58 mVPP / 11 mVRMS	2 mARMS
PSI 9500-10 DT	0...500 V	0...10 A	0...1500 W	≤93%	62 mVPP / 13 mVRMS	8 mARMS
PSI 9750-06 DT	0...750 V	0...6 A	0...1500 W	≤93%	94 mVPP / 16 mVRMS	10 mARMS

⁽¹ Programmable resolution disregarding device errors
⁽² RMS value: measures at LF with BWL 300 kHz, PP value: measured at HF with BWL 20MHz