The Model 7052 is a configured 4 x 5(4 rows by 5 columns) channel cross point matrix card with 3-pole Form A (normally open) switching for HI, LO and GUARD. Designed for general purpose signal switching, the matrix switching scheme offers the flexibility to connect any one point to another. The card is field installable in an appropriate Keithley mainframe (eg. Model 705 or Model 706). The switching is accomplished in less than 2msec (exclusive of mainframe) and then specified relay life is 107 closures at maximum signal levels. Quick disconnect screw terminals (No. 18 AWG maximum) are used to facilitate input and output connections to the matrix scanner card. The scanner mainframe must be in the matrix mode (Program 6, number 0, available in B5 or later software for the Model 705) in order to operate the Model 7052 matrix card .