2.3. Key Features

A quick summary of the XR Series key features:

  • SCPI Remote Programming API

  • High Accuracy Measurements

  • Master-Slave Functionality

  • Remote Sensing

  • 37-Pin External User I/O

  • RS232 Interface

  • Ethernet and GPIB Available

  • 0-10V External Analog Inputs

  • Programmable Protection Limits

  • Fast Transient Response

  • Remote Interface Software

  • NI LabVIEW™ and IVI Driver

  • Interlock Shutdown Input

  • Designed and manufactured in the USA

2.3.1. Output Features

  • Robust Power Conversion Topology - All MagnaDC programmable DC power supplies utilize high-frequency IGBT-based power processing in current-fed topology. This topology adds an additional stage over the conventional voltage-fed topology for enhanced control and system protection, ensuring that even under a fault condition, the power supply will self-protect. Due to the self-protecting characteristics of this topology, the possibility of fast rising current spikes and magnetic core saturation is eliminated. Every power supply is tested at 90% to 125% nominal line to ensure satisfactory operation even under the worst line voltage conditions.

  • Fast Transient Response - Quick response to load changes, with 2 ms to recover within ±1% of regulated output with a 50% to 100% or 100% to 50% step load change.

  • Programmable Output Protection - Programmable over voltage trip (OVT) and over current trip (OCT) allow the user to program in soft latching fault trips when the threshold is exceeded. OVT and OCT settings can be programmed from 10% to 110% of the unit’s max ratings.

  • Wired Remote Sensing with Smart Detection - A set of remote sensing terminals are provided to sense voltage at the load and compensate for voltage drop in the load cables. Compensation is provided up to 3% above the unit’s max rated voltage. Wired remote sensing is available on models rated 1000 Vdc and below.

  • Leadless Remote Sensing - Using the product’s integrated modulation functionality, automatically compensate for voltage as a function of current. When the impedance between the power supply and load is known, this feature allows for remote sensing without leads, up to the max ratings of the product.

2.3.2. Programming Features

  • High Accuracy Programming and Measurement - ± 0.075% of max rated voltage or current programming accuracy to ensure the output is following the desired programmed set point. ± 0.2% of max rated voltage or current readback accuracy ensures high accuracy measurements. A NIST traceable calibration certificate is provided at no charge with all new units.

  • Simultaneous Measurement Interfaces - Voltage and current measurements are available simultaneously from the front panel meters, dedicated 0-10V analog output, and by computer command.

  • SCPI Remote Programming API - Compatible with the Standard Commands for Programmable Instruments (SCPI), allowing raw ASCII text commands to control all features, functions, and configurations of the product. Commands are consistent across all available interfaces.

  • 37-pin External User I/O Port - An isolated 37-pin external user I/O port is provided, which includes a variety of analog and digital inputs and outputs. Voltage, current, over voltage and over current set points can be set by applying a 0-10V analog signal. Each diagnostic condition is given a designated pin, which reads +5V when active. Reference +5V and +10V signals are provided, eliminating the need for external voltage signals and allowing the use of dry contacts. All these pins are isolated from the output terminals and referenced to earth-ground as standard—no additional isolation equipment or options necessary.

2.3.3. System Features

  • AC Mechanical Contactor with In-rush Limiter - An integrated mechanical contactor on the AC input circuit ensures the product is not processing power when in standby or fault. This contactor, coupled with step-start in-rush limiter circuitry, ensures no in-rush current will exceed peak input current rating of the product.

  • Designed for Safety - Extensive diagnostic functions are provided, including: AC phase loss (not on SL Series), excessive thermal conditions, over voltage trip (programmable), over current trip (programmable), cleared fuse (not on SL/XR Series), excessive program line voltage, and interlock fault. A dedicated +5V interlock input pin and included +5V reference on all models, external emergency stop systems can be easily integrated using an external contact.

  • High-Performance Plug and Play Master-Slaving - Power capability can easily be expanded with additional units by using the plug and play UID47 master-slaving device. In the MagnaDC master-slave scheme, the master sends gate drive signals directly to the slave units. This strategy eliminates the noise susceptibility commonly found when sending analog control references over long distances, in addition to enabling consistent performance by maintaining a single control loop.

  • Tailor Performance with Integrated Options - A variety of configured-to-order options are available for MagnaDC programmable power supplies are designed to be flexible, depending on the application’s requirements.

  • Designed and Manufactured in the USA - For complete control of quality, MagnaDC programmable DC power supplies are designed and manufactured at Magna-Power’s vertically integrated USA manufacturing facility in Flemington, New Jersey. Heat-sinks and chassis are machined from aluminum. All sheet metal is fabricated and powder coated in-house. Magnetics are wound-to-order from validated designs based on a model’s voltage and current. An automated surface-mount production line places components on printed circuit boards for control, driver, auxiliary power, and display circuits. And finally after assembly, products undergo comprehensive test and NIST-traceable calibration, followed by an extended burn-in period.