Agilent Technologies Switch/Measure 34931A Dual 4x8 Armature Matrix, Are connecting matrices

5Matrix Switch Modules

34931A Dual 4x8 Armature Matrix

The 34931A dual 4x8 armature matrix contains two matrices, each with 32 2- wire crosspoint latching armature relays organized in a 4- row by 8- column configuration. Every row and column are made up of two wires each, a high

(H)and a low (L). Each crosspoint relay has a unique channel number representing the row and column that intersects to create the crosspoint. For example, channel 304 represent the crosspoint connection between row 3 and column 4 (all columns consisting of two digits; in this case the digits are 04). See the simplified schematic on page 145.

You can connect any combination of inputs and outputs at the same time. However, only Matrix 2 in this module connects to the Analog Buses. By closing channels 921 and 922 you can connect rows 5 and 6 respectively to the internal DMM of the 34980A mainframe for voltage and resistance measurements. You can connect multiple matrix modules externally and/or through the Analog Buses for applications that require large matrices. For information on linking multiple matrices, refer to page 142 of this chapter.

N O TE	When the DMM is scanning, it controls ABus1 and ABus2 relays,
	which are on Matrix 2. Therefore, consider this behavior when you
	are connecting matrices.

When the power is off, matrix relays maintain state, and Analog Bus relays open.

144 34980A User’s Guide