NI PXI-2593 Independent Topology

The NI PXI-2593 supports the independent topology, allowing you to utilize its full routing capabilities. Possible configurations include 3×1 multiplexers and dimensionally flexible sparse matrices.

Making a Connection

Control the individual relays with the niSwitch Relay Control VI or the niSwitch_RelayControl function (refer to the NI PXI-2593 hardware diagram for relay names). For example, to connect CH2 to COM0 on the NI PXI-2593, call the niSwitch Relay Control VI or the niSwitch_RelayControl function with relay action set to Relay Closed and relay name set to KA0. Repeat the call to the niSwitch Relay Control VI or the niSwitch_RelayControl function to close KB1 then KC0.

When scanning the NI PXI-2593, use the channel names in the scan list. A typical scan list entry could be ch2->com0;. This entry routes the signal connected to CH2 to COM0.

Valid Internal Channels

To determine the internal channel names, combine the names of all relays adjacent to a channel, in alphabetical order, and remove the K's. For example, the channel connecting KA0 and KB0 is called A0B0.

For example, to connect CH0 to COM0 using internal channel names, you need to call the following:

niSwitch_Connect (exampleSession, ch0, a0b0);
niSwitch_Connect (exampleSession, a0b0, b0b1c0);
niSwitch_Connect (exampleSession, b0b1c0, c0c1c2c3d0d1);
niSwitch_Connect (exampleSession, c0c1c2c3d0d1, com0);

The following is a list of the valid internal channel names:

a0b0	b0b1	c0c1	ch4
a10b10	b0b1c0	c0c1c2c3d0d1	ch5
a11b11	b10b11	c2c3	ch6
a12b12	b10b11c5	c4c5	ch7
a13b13	b12b13	c4c5c6c7d4d5	ch8
a14b14	b12b13c6	c6c7	ch9
a15b15	b14b15	ch0	com0
a1b1	b14b15c7	ch10	com1
a2b2	b2b3	ch11	d0d1
a3b3	b2b3c1	ch12	d1d2
a4b4	b4b5	ch13	d2d3
a5b5	b4b5c2	ch14	d2d3d4
a6b6	b6b7	ch15	d4d5
a7b7	b6b7c3	ch1
a8b8	b8b9	ch2
a9b9	b8b9c4	ch3