This product is order related with an standard delivery time of approx. 9 - 10 weeks.
The microprocessor controlled laboratory power supplies of series EA-PSI 9000 2U offer a user-friendly, interactive handling concept, along with a remarkable set of standard features, which can facilitate operating them. Configuration of output parameters, supervision features and other settings, as well as the replaceable digital interface modules is smart and comfortable. The implemented supervision features for all output parameters can help to reduce test equipment and make it almost unnecessary to install external supervision hardware and software. The clear control panel with its two knobs, one pushbutton, two LEDs and the touch panel with colour TFT display for all important values and status enable the user to handle the device easily with a few touches of a finger. For the integration into semi-automatic and remotely controlled test and automation systems, the devices offer a set of interfaces (analog and digital) on their rear side.
TECHNICAL DATA
- Wide AC voltage range 90…264 V with active PFC
- High efficiency up to 93%
- Output power ratings: 0…1000 W
- Output voltages: 0…200 V
- Output currents: 0…15 A
- Flexible, power regulated output stage
- Various protection circuits (OVP, OCP, OPP, OTP)
- Intuitive TFT touch panel with display for values, status and notifications
- Remote sensing
- Galvanically isolated, analog interface
- Integrated function generator
- Photovoltaics array simulation
- Internal resistance simulation and regulation
- 40 V models compliant to SELV (EN 60950)
- Discharge circuit (Uout < 60 V in ≤ 10 s)
- USB port integrated
- Optional, digital interface modules or alternatively installed IEEE/GPIB port
- SCPI command language supported
- Weight of standard version: 12 Kg
- Dimension of standard version (without extras): 19" 2HE/U x 463 mm
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.
AC SUPPLY
All units are provided with an active Power Factor Correction circuit and models up to 1.5 kW are suitable for a worldwide usage on a mains supply from 90 VAC up to 264 VAC. With the 1.5 kW models, the output power is automatically reduced to 1 kW if the supply voltage is <150 VAC and with the 3 kW models is reduced to 2.5 kW at <205 VAC.
DC OUTPUT
DC output voltages between 0…40 V and 0…750 V, output currents between 0…4 A and 0…120 A and output powers between 0…1000 W and 0…3000 W are available. Current, voltage and power can thus be adjusted continuously between 0% and 100%, no matter if manually or remotely controlled (analog or digital). The output terminal is located on the rear panel of the devices.
DISCHARGE CIRCUIT
Models with a nominal output voltage of 200 V or higher include a discharge circuit for the output capacities. For no load or low load situations, it ensures that the dangerous output voltage can sink to under 60 V DC after the DC output has been switched off. This value is considered as limit for voltages dangerous to human safety.
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.
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 overtemperature 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 for voltage drops along the power cables, up to a certain level. Once the sensing input is connected to the load, the power supply will adjust the output voltage automatically to ensure the accurate required voltage is available at the load. Set values and actual values of output voltage, output current and output power are clearly represented on the graphic display. The colour 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.
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. Additionally to the standard functions, which are all based upon a so-called arbitrary generator, this base generator is accessible for the creation and execution of complex sets of functions, separated into up to 99 sequences. Those 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 realised with the arbitrary generator. The function can be created on the device or externally and then loaded or saved: There is furthermore a XY generator, which is used to generate other functions, such as UI or IU, which are defined by the user in form of tables (CSV file) and then loaded from USB drive. For photovoltaics related tests, a PV curve can be generated and used from user-adjustable key parameters. Even more characteristics can be installed for user selection by applying future firmware updates.
MASTER-SLAVE
All models feature a digital master-slave bus by default. It can be used to connect up to 16 units of identical models in parallel operation to a bigger system with totals formation of the actual value of voltage, current and power. The configuration of the master-slave system is either completely done on the control panels of the units or by remote control via any of digital communication interfaces. Handling of the master unit is possibly by manual or remote control (any interface).
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”.
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