DC Power Supplies

PQA SERIES power supplies are fully programmable via resistance, voltage, current, or optional IEEE-488/RS232. While other supplies can remotely control only output voltage and current, PQA SERIES units also allow programming of over voltage and over current protection. Program lines are constantly monitored for range of operation. If a line should open or if a programmable input is set beyond that anticipated, the unit safely shuts down protecting the load.

PQA SERIES can operate as a voltage source or current source depending on the control settings and load conditions. If the power supply is operating as a voltage source and the load increases to a point beyond the current command setting, the power supply automatically crosses over to current mode control and operates as a current source at that setting.

Differential feedback amplifiers allow remote load sensing at any distance from the power supply. Additional differential amplifiers are provided for master/slave series or parallel operation.

Diagnostic functions are contained directly within the supply’s control loop. Exclusive circuitry eliminates guesswork about which function has control -- voltage, current, or a fault condition. If the fault condition requires user attention, main power is disconnected and the diagnostic condition is latched into memory. Pressing the reset switch clears the memory. All diagnostic functions are monitored with optical isolators that can be paralleled for master/slave operation. Furthermore, control functions are also set through optical isolators to allow simultaneous control of one or more PQA SERIES units. Programming switches in the rear of the supply enable internal operation of controls, external operation, or both.

PQA SERIES supplies have three levels of over voltage/current protection: shutdown of controlling insulated gate bipolar transistors (IGBT’s), disconnect of main power, and optional SCR crowbar. After an over voltage/current condition, the supply must be reset. Pressing the reset switch causes the over voltage/ current settings to be displayed on the front meters. PQA SERIES have push button start/stop controls. These controls are tied to a mechanical contactor which operate with the electronic switches to break the ac mains when stop is commanded. Unlike competing products, an off means both an electrical and mechanical break in the power circuit -- not a break in an electronic switch. Safety comes first at Magna-Power Electronics.

Magna-Power Electronics, Inc. HIGH PERFORMANCE PRODUCT MATRIX DC POWER SUPPLIES MODELS MODEL SERIES VOLTS Vdc AMPS Adc POWER kW FEATURES PQ II M I N 5 3 3.3 54 Models: 5 to 1000 Vdc, 3 to 900 Adc Series and parallel master/slave operation High dielectric withstand: 2500 Vac 50 Hz and 60 Hz input frequency All user interface circuitry referenced to earth ground OVT and OCT shutdown standard Automatic V/I crossover RS232 interface with SCPI commands Optional IEEE-488, RS485, and Ethernet programming Front panel potentiometers for stepless rotary control Front panel calibration User friendly controls and indicators Remote Interface Software with self-teaching features Drivers: Certified LabWindows/CVI and LabVIEW for GPIB, Serial, and TCP/IP communications Load dependent cooling High power factor M A X 1000 900 10 TS M I N 16 20 15 80 Models: 16 to 1000 Vdc, 20 to 2700 Adc Series and parallel master/slave operation High dielectric withstand: 2500 Vac 50 Hz to 400 Hz input frequency All user interface circuitry referenced to earth ground OVT and OCT shutdown standard Automatic V/I crossover RS232 interface with SCPI commands Optional IEEE-488, RS485, and Ethernet programming Front panel potentiometers for stepless rotary control Front panel calibration User friendly controls and indicators Remote Interface Software with self-teaching features Drivers: Certified LabWindows/CVI and LabVIEW for GPIB, Serial, and TCP/IP communications Load dependent cooling High power factor M A X 1000 2700 45 MS M I N 16 20 30 80 Models: 16 to 1000 Vdc, 20 to 4500 Adc Series and parallel master/slave operation High dielectric withstand: 2500 Vac 50 Hz to 400 Hz input frequency All user interface circuitry referenced to earth ground OVT and OCT shutdown standard Automatic V/I crossover RS232 interface with SCPI commands Optional IEEE-488, RS485, and Ethernet programming Front panel potentiometers for stepless rotary control Front panel calibration User friendly controls and indicators Remote Interface Software with self-teaching features Drivers: Certified LabWindows/CVI and LabVIEW for GPIB, Serial, and TCP/IP communications Load dependent cooling High power factor M A X 1000 4500 75 MT II M I N 100 16 40 39 Models: 16 to 2500 Vdc, 40 to 6000 Adc Series and parallel master/slave operation High dielectric withstand: 2500 Vac 50 Hz and 60 Hz input frequency All user interface circuitry referenced to earth ground OVT and OCT shutdown standard Automatic V/I crossover RS232 interface with SCPI commands Optional IEEE-488, RS485, and Ethernet programming Front panel potentiometers for stepless rotary control Front panel calibration User friendly controls and indicators Remote Interface Software with self-teaching features Drivers: Certified LabWindows/CVI and LabVIEW for GPIB, Serial, and TCP/IP communications Load dependent cooling High power factor M A X 750 2500 6000 Instrument selection