• Six 850W models with maximum voltage outputs from 20V to 150V, maximum current outputs from 42A to 5.6A • Isolated analog inputs minimize control line noise • Built-in LAN, USB, GPIB, RS-232, RS-485 interfaces and analog inputs are all standard • Constant voltage, constant current, and constant power setting control • Auto sequence control supports internal execution of commands to minimize bus communication time • Control up to 30 supplies through a single controller interface • Foldback mode with programmable delay shuts down the output on transitions between CV and CC operation to protect voltage- or currentsensitive devices • Numerous safety features protect the load and the supply, including: over-voltage and under-voltage protection, over-current protection, overtemperature protection, loop protection for multiple-supply configurations, and a hardware output interlock APPLICATIONS The six models in the 850W DC Power Supplies in the Series 2268 provide voltage and current output levels well suited for automated test applications. They offer maximum voltage outputs of 20V, 40V, 60V, 80V, 100V, and 150V with corresponding maximum current outputs of 42A, 21A, 14A, 10.5A, 8.5A, and 5.6A. Series 2268 supplies allow outputting any current, including the maximum current, at any voltage. They provide both analog and digital control options and a number of digital interface options and can operate in constant voltage (CV), constant current (CC), or constant power modes to address a broad array of applications. These high-efficiency, soft-starting power supplies provide reliable performance and long life. 850W in the Most Compact Package The Series 2268 supplies offer the highest power density in the smallest package. The Series 2268 supplies are packaged in a low profile 1U high, half-rack width enclosure. These supplies take up minimum space in a test rack. When multiple supplies are needed, these supplies can easily mount side-by-side in a test rack to provide two outputs in a 1U height space. Ventilation for the Series 2268 supplies is from the front of the instrument to the back so additional rack space for airflow above, below, or to the side of the supplies is not required. Thus, only 1U of total rack height is all that is needed. Furthermore the Series 2268 power supplies operate at temperatures up to 50°C so that they can perform reliably even in test racks that have elevated temperatures. Series 2268 DC Power Supply Isolated Analog Input Output – Interlock Safety Limit Switches Fixture Control • Production testing • Environmental testing • Accelerated life testing • Process control systems • Two auxiliary outputs support driving or signaling external devices, often eliminating the need for additional instrumentation Use a Series 2268 DC supply as part of a control system. Analog control signals can program the supply’s output. In addition to driving the load, the supply’s two auxiliary outputs can drive external devices or circuits. The auxiliary outputs can eliminate the need for extra power sources in a test system. Interlock connections can turn off the supply’s output if an unsafe external condition is detected. A Greater Measure of Confidence • Compact 1U, half-rack enclosure provides the highest power in the smallest package

Ordering Information 2268-20-42 850W DC Power Supply, 20V, 42A 2268-40-21 850W DC Power Supply, 40V, 21A 2268-60-14 850W DC Power Supply, 60V, 14A 2268-80-10 850W DC Power Supply, 80V, 10.5A 2268-100-8 850W DC Power Supply, 100V, 8.5A 2268-150-5 850W DC Power Supply, 150V, 5.6A Accessories Supplied CD with manual, power cord, test lead connection hardware (for 2268-20-42 and 2268-40-21 only) Downloads from www.keithley.com IVI driver LabVIEW driver ACCESSORIES AVAILABLE Hardware to Connect Test Lead Lugs to the 2268-20-42 or 2268-40-21 2268-RMK-1 Rack Mount Kit for One Series 2268 DC Power Supply...

The Series 2268 power supplies incorporate a standard foldback function which, when enabled, will turn the output off if the load condition causes the supply to switch between the CV and CC control modes. In addition, the Series 2268 supplies add a programmable delay time to the foldback function to allow a time delay before the output is turned off. Thus, if the supply is powering a load with a high in-rush current which is large enough to cause the supply to switch to the CC mode from the CV mode, the delay would prevent the foldback function from an unwanted shutdown of the output so that...

850W DC Power Supplies ANALOG CONTROL Model Accuracy Voltage Programming 9 Current Programming10 Power Programming11 Voltage Readback 9 Current Readback10 Power Readback11 Meter Accuracy Resolution12 Voltage Programming Current Programming Power Programming Voltage Readback Current Readback Power Readback ANALOG VOLTAGE INPUT PROGRAMMING RANGE FOR VOLTAGE AND CURRENT OUTPUT: 0.0V to a maximum voltage, which can be set from 2.0V to 10V. Resolution of the maximum voltage is 0.1V. 0.0V to maximum voltage corresponds to 0 to rated output. ANALOG RESISTANCE INPUT PROGRAMMING RANGE FOR VOLTAGE AND...

PARALLEL OPERATION: Up to 4 instruments in a master/slave configuration. SERIES OPERATION: Up to 2 instruments (with external diodes). POWER SUPPLY RATED AC INPUT VOLTAGE/FREQUENCY: 100VAC to 240VAC, 47Hz to 63Hz. OPERATIONAL AC INPUT VOLTAGE/FREQUENCY: 85VAC to 265VAC, continuous, single-phase, 47Hz to 63Hz, 360Hz to 440Hz. INPUT CURRENT (100/200VAC): 11.5/6A (850W). INPUT POWER: 1100VA. INRUSH CURRENT (100/200VAC): <25A (850W). POWER FACTOR CORRECTION: 0.99 at 100/200VAC, rated output power. EFFICIENCY17 (100/200VAC input): Model 2268-20-42: 82/85%. All other models: 83/87%. TEMPERATURE COEFFICIENT:...

Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments. All other trademarks and trade names are the property of their respective companies. A Greater Measure of Confidence KEITHLEY INSTRUMENTS ■ 28775 AURORA RD. ■ CLEVELAND, OH 44139-1891 ■ 440-248-0400 ■ Fax: 440-248-6168 ■ 1-888-KEITHLEY ■ www.keithley.com UNITED KINGDOM +44-1344-39-2450 www.keithley.co.uk For further information on how to purchase or to locate a sales partner please visit www.keithley.com/buy © Copyright 2014 Keithley Instruments