Switching Topology

As illustrated in block diagram form, the basic switch topology connects one input to one output. This input can be one or more signal lines, connected through Form A, B, or C switching elements. One pole is required for each signal line, with all poles controlled together. The figure below shows an example using each switch topology.

Switch Topology (Form A, B, C)

A typical application for this switch topology is power and control applications. Because each switch is independent and isolated, more than one switch can be closed at the same time.

Hardware that implements the switch topology often provides the flexibility to select Form A, B, or C switching and the number of poles controlled together. If the test system designer is willing to do external wiring, then any topology can be built from the basic switch topology.

Marvin Test Solutions' GX6315  can be used to perform all switching functions shown in the figure above. Since these products contain individually controlled Form-C relays, The COM and NO poles of the relay will be used in the first example, the COM and NC poles will be used in the second, and two relays (COM, NO, and NC) will be used in the third.