The Model 7053 is a high current scanner card with the maximum capabilities of 300V, 5A or 1GQV*A switching (resistive load only). Signal levels of this magnitude may be found in applications such as power semiconductor testing. The Mode! 7053 can also be used in monitoring currents from DC power supplies in general purpose ATE bench or laboratory applications. For easy input and output wiring the Model 7053 is designed with quick disconnect screw terminals. Each channel has a Hi and LO connection with a common guard. Each of the 10 channels consist of a single 2-pole Form C relay. The card is field installable in an appropriate Keithley scanner mainframe (e.g. Model 705} via the mainframe's rear panel. Channel switching is accomplished in less than 15msec {exclusive of mainframe; and the specified relay life is greater than 10⁷ closures (greater than 10⁵ closures at maximum signal levels). With the Model 7053's high channel isolation ( >10⁹Ω), it is well insulated from cross channel noise and interference. The Model 7053's high input isolation {>10⁶Ω) reduces loading to a minimum.