Keithley expands 1U Half-Rack Power Supply Offering to 850W
Packaged in a 1U high by half-rack wide configuration, the Keithley 850W Series 2268 dc power supplies from Tektronix, Inc. combine the highest available maximum power output in the Tektronix-Keithley power supply line with a compact form factor designed for saving space, for example when building high-density automated test systems. Series 2268 supplies also offer a wide choice of ranges with maximum voltage and current outputs from 20V and 42A to 150V and 5.6A.
Five standard digital interfaces (LAN, USB, GPIB, RS-232, and RS-485) are built in to the Series 2268 enabling users to choose the optimum interface for the application. These power supplies also include separate 15V and 5V analog control outputs for controlling relays and for interfacing with test fixtures and component handlers. This eliminates the need for additional instrumentation in the test system. For applications that require controlling the supply’s output with analog signals, the Series 2268’s isolated analog inputs minimize potential ground loops.
An auto sequence program mode gives the Series 2268 supplies the built-in intelligence needed to execute lists of commands. Multiple commands can be downloaded, stored in memory and executed using a single command from the controller. The program can be repeated a specific number of times or cycled continuously. This can save test time by eliminating the delays involved in sending individual commands over a PC bus.
Up to 30 Series 2268 supplies can be controlled through a single interface by linking all of them together through their RS-485 interfaces. That lets users control all the supplies through a master unit, which can use any of the five standard PC interfaces, simplifying the management of multiple power supplies. For applications that require a higher voltage or current two Series 2268 power supplies can be connected in series or up to four of them in parallel.
A foldback mode with programmable delay shuts down the output on transitions between constant voltage and constant current operation to protect voltage- or current-sensitive devices. In addition to the foldback mode, the Series 2268 supplies provide numerous safety features designed to protect the load and the supply, including over-voltage and under-voltage protection, over-current protection, over-temperature protection, loop protection for multiple-supply configurations, and a hardware output interlock.
